Gearbox, hybrid system and vehicle

Abstract

The present disclosure provides a gearbox, a hybrid power system and a vehicle, which comprises a housing, a transmission mechanism, a first clutch, a second clutch, a first main shaft and a second main shaft; the first main shaft and the second main shaft are movably inserted into the housing, and the first main shaft is parallel and spaced apart from the second main shaft; the transmission mechanism comprises a central wheel, a plurality of planetary gears, a planet carrier, a ring gear, the first clutch and the second clutch; the ring gear is coaxially arranged with the central wheel; the plurality of planetary gears are located between the central wheel and the ring gear, and are in meshing connection with the central wheel and the ring gear; the first clutch is located on the first main shaft, and divides the first main shaft into a first section and a second section; the first section is in driving connection with the ring gear, and is used for being in driving connection with a power source; the second section is in driving connection with the central wheel; the planet carrier is coaxially sleeved outside the second main shaft; and the second clutch is located on the second main shaft, and is in driving connection with the second main shaft and the ring gear, respectively. The present disclosure can avoid dragging the motor, and simplify the structure of the gearbox.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of automobiles, in particular to a gearbox, a hybrid power system and an automobile. BACKGROUND

[0002] The hybrid power system is a power system taking an engine and a motor as power sources to jointly drive an automobile to travel. The hybrid power system comprises a gearbox, an engine and a motor. The gearbox usually comprises a first main shaft and a second main shaft in transmission connection. The output shafts of the engine and the motor are respectively in transmission connection with the first main shaft, so that the engine and the motor can transmit power to the gearbox. Wheels are in transmission connection with the second main shaft, so that the power of the engine and the motor can be output to the wheels to drive the vehicle to travel.

[0003] In the related art, a plurality of gear sets and a synchronizer are usually arranged in the gearbox. The gear sets are respectively in transmission connection with the first main shaft and the second main shaft, and the synchronizer is located on the first main shaft. The synchronizer is used to control whether each gear set is in transmission connection with the first main shaft. In this way, the power of the engine and the motor can be transmitted to the wheels through different gear sets by switching the synchronizer, so as to realize multi-gear driving.

[0004] However, arranging a plurality of gear sets makes the structure of the gearbox more complex and occupies a large space, which is not conducive to reducing the cost of the gearbox. SUMMARY

[0005] The present disclosure provides a gearbox, a hybrid power system and an automobile, which can realize multi-gear driving while simplifying the structure of the gearbox and reducing the cost. The technical solution is as follows:

[0006] The present disclosure provides a gearbox, which comprises a housing, a transmission mechanism, a first clutch, a second clutch, a first main shaft and a second main shaft. The transmission mechanism, the first clutch and the second clutch are located in the housing. The first main shaft and the second main shaft are movably inserted into the housing. The first main shaft is parallel and spaced apart from the second main shaft. The second main shaft is used to be in transmission connection with wheels. The transmission mechanism comprises a sun gear, a plurality of planet gears, a planet carrier, a ring gear, a first clutch and a second clutch. The ring gear is coaxially arranged with the sun gear. The plurality of planet gears are located between the sun gear and the ring gear and are in meshing connection with the sun gear and the ring gear. The first main shaft comprises a first section and a second section connected by the first clutch. The first section is in transmission connection with the ring gear and is used to be in transmission connection with a power source. The second section is in transmission connection with the sun gear. The planet carrier is coaxially sleeved outside the second main shaft. The second clutch is in transmission connection with the second main shaft and the ring gear.

[0007] In another implementation manner of the embodiment of the present disclosure, the transmission mechanism further comprises a first transmission gear and a second transmission gear, the first transmission gear and the second transmission gear are engaged; the first transmission gear is coaxially sleeved outside the first section, the second transmission gear is movably sleeved outside the second main shaft, the second transmission gear is in transmission connection with the gear ring, and the second transmission gear is in transmission connection with the second clutch.

[0008] In an implementation manner of the embodiment of the present disclosure, the transmission mechanism further comprises a connecting ring, an outer edge of the connecting ring is coaxially connected with the gear ring, and an inner edge of the connecting ring is coaxially connected with the second transmission gear.

[0009] In another implementation manner of the embodiment of the present disclosure, the second clutch comprises a flywheel and a driven disc coaxially distributed, in the second clutch, the flywheel of the second clutch is coaxially sleeved outside the second main shaft, the driven disc of the second clutch is movably sleeved outside the second main shaft, and the driven disc of the second clutch is coaxially connected with the second transmission gear.

[0010] In another implementation manner of the embodiment of the present disclosure, the transmission mechanism further comprises a third transmission gear, a fourth transmission gear and a hollow shaft, the third transmission gear and the fourth transmission gear are engaged; the third transmission gear is coaxially sleeved outside the second section, the fourth transmission gear is coaxially sleeved outside the hollow shaft, the hollow shaft is movably sleeved outside the second main shaft, and one end of the hollow shaft is coaxially connected with the center wheel.

[0011] In another implementation manner of the embodiment of the present disclosure, the first clutch comprises a flywheel and a driven disc coaxially distributed, the flywheel of the first clutch is coaxially connected with the first section, and the driven disc of the first clutch is coaxially connected with the second section.

[0012] In another implementation manner of the embodiment of the present disclosure, the transmission mechanism further comprises a fifth transmission gear and a differential, the fifth transmission gear is coaxially sleeved outside the second main shaft, the fifth transmission gear is in engagement with an input gear of the differential, and an output shaft of the differential is in transmission connection with the wheel.

[0013] The embodiment of the present disclosure provides a hybrid power system, the hybrid power system comprises a first power source, a second power source, a third power source and a transmission mechanism as described above, the first power source is an engine, the second power source is a first motor, and the third power source is a second motor; the engine, the first motor and the second motor are located outside the shell, an output shaft of the engine is coaxially connected with the first main shaft, an output shaft of the first motor is in transmission connection with the first main shaft, and an output shaft of the second motor is in transmission connection with the second main shaft.

[0014] In another implementation form of the hybrid power system according to the disclosure, the hybrid power system further comprises a power supply assembly located outside the housing, and the power supply assembly comprises a battery and two inverters, one of the two inverters being connected between the battery and the first motor, and the other of the two inverters being connected between the battery and the second motor.

[0015] The disclosure provides a vehicle, which comprises the hybrid power system as described above and a vehicle body, and the hybrid power system is located in the vehicle body.

[0016] The technical scheme provided by the disclosure has at least the following beneficial effects:

[0017] The transmission mechanism in the gearbox according to the disclosure comprises a sun gear, a plurality of planet gears, a planet carrier, a ring gear, a first clutch and a second clutch. The first clutch is located on the first main shaft and separates the first main shaft into a first section and a second section, and the first clutch can realize power on-off between the first section and the second section. The second clutch is located on the second main shaft and is in transmission connection with the second main shaft and the ring gear, respectively, and the second clutch can realize power on-off between the first section and the second main shaft.

[0018] When the gearbox is working, the power of the power source can be transmitted to the first section. When the first clutch is separated and the second clutch is combined, the power of the power source can be transmitted to the second main shaft in sequence through the first section, the ring gear and the second clutch, to realize the first gear mode to drive the wheels. When the first clutch is combined and the second clutch is separated, part of the power of the power source is transmitted to the planet carrier in sequence through the first section, the ring gear and the planet gears, and the other part of the power of the power source is transmitted to the planet carrier in sequence through the first section, the first clutch, the second section, the sun gear and the planet gears. In this way, the two parts of the power of the power source are transmitted to the planet carrier through different paths and coupled at the planet carrier, and finally the coupled power is transmitted to the wheels through the second main shaft to realize the second gear mode to drive the wheels. This kind of transmission structure can realize multi-gear driving without setting multiple gear trains and synchronizers, which not only simplifies the structure of the gearbox, reduces the space ratio of the gearbox, but also reduces the manufacturing cost. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme in the embodiments of the disclosure, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the disclosure, and other drawings can be obtained by those skilled in the art without creative labor.

[0020] Figure 1Fig. 1 is a structural schematic diagram of a gearbox according to an embodiment of the present disclosure;

[0021] Figure 2 Fig. 2 is a structural schematic diagram of a hybrid system according to an embodiment of the present disclosure;

[0022] Figure 3 Fig. 3 is an energy transmission schematic diagram of the hybrid system in an all-electric mode according to an embodiment of the present disclosure;

[0023] Figure 4 Fig. 4 is an energy transmission schematic diagram of the hybrid system in a hybrid mode according to an embodiment of the present disclosure;

[0024] Figure 5 Fig. 5 is an energy transmission schematic diagram of the hybrid system in a hybrid mode according to an embodiment of the present disclosure;

[0025] Figure 6 Fig. 6 is an energy transmission schematic diagram of the hybrid system in a hybrid mode according to an embodiment of the present disclosure;

[0026] Figure 7 Fig. 7 is an energy transmission schematic diagram of the hybrid system in an engine direct drive mode according to an embodiment of the present disclosure;

[0027] Figure 8 Fig. 8 is an energy transmission schematic diagram of the hybrid system in an engine direct drive mode according to an embodiment of the present disclosure;

[0028] Figure 9 Fig. 9 is an energy transmission schematic diagram of the hybrid system in an energy recovery mode according to an embodiment of the present disclosure.

[0029] The following are explanations of the various marks in the figures:

[0030] 100, housing;

[0031] 10, engine; 11, first motor; 12, second motor; 13, wheel;

[0032] 21, first main shaft; 211, first section; 212, second section; 22, second main shaft; 23, hollow shaft;

[0033] 31, sun gear; 32, planet gear; 33, planet carrier; 34, ring gear;

[0034] 41, first clutch; 42, second clutch; 401, flywheel; 402, driven disc;

[0035] 51, first transmission gear; 52, second transmission gear; 53, third transmission gear; 54, fourth transmission gear; 55, fifth transmission gear; 56, connecting ring;

[0036] 61, first gear train; 62, second gear train; 63, differential;

[0037] 70, power supply assembly; 71, battery; 72, inverter. DETAILED DESCRIPTION

[0038] In order to make the objects, technical solutions and advantages of the present disclosure clearer, the following will further describe the embodiments of the present disclosure in detail with reference to the drawings.

[0039] Unless otherwise defined, technical terms or scientific terms used herein should be understood as having the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terms "first", "second", "third" and similar terms used in the specification and claims of the present patent application do not denote any order, quantity or importance, but are used to distinguish different components. Similarly, the terms "one" or "a" or similar terms do not denote a quantity limitation, but mean that at least one exists. The terms "include" or "contain" or similar terms mean that the elements or objects appearing before the terms "include" or "contain" cover the elements or objects listed after the terms "include" or "contain" and their equivalents, and do not exclude other elements or objects. The terms "connected" or "connected" or similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms "up", "down", "left", "right", "top", "bottom" and the like are only used to indicate relative positional relationships, and when the absolute positions of the described objects change, the relative positional relationships may also change accordingly.

[0040] Figure 1 is a structural schematic diagram of a gearbox provided by an embodiment of the present disclosure. As shown in Figure 1 , the gearbox comprises a housing 100, a transmission mechanism, a first clutch 41, a second clutch 42, a first main shaft 21 and a second main shaft 22.

[0041] As shown in Figure 1 , the transmission mechanism, the first clutch 41 and the second clutch 42 are all located in the housing 100, and the first main shaft 21 and the second main shaft 22 are both movably inserted into the housing 100, the first main shaft 21 and the second main shaft 22 are parallel and spaced apart, and the second main shaft 22 is used for driving connection with a wheel 13.

[0042] As shown in Figure 1As shown, the variable speed mechanism comprises a center wheel 31, a plurality of planetary gears 32, a planet carrier 33, a ring gear 34, a first clutch 41 and a second clutch 42, the ring gear 34 is coaxially arranged with the center wheel 31, the plurality of planetary gears 32 are located between the center wheel 31 and the ring gear 34 and are in mesh with the center wheel 31 and the ring gear 34, the first main shaft 21 comprises a first section 211 connected by the first clutch 41 and a second section 212, the first section 211 is in driving connection with the ring gear 34, and the first section 211 is used for driving connection with the power source, the second section 212 is in driving connection with the center wheel 31, the planet carrier 33 is coaxially sleeved outside the second main shaft 22, and the second clutch 42 is in driving connection with the second main shaft 22 and the ring gear 34.

[0043] The variable speed mechanism in the gearbox of the embodiment of the present disclosure comprises a center wheel 31, a plurality of planetary gears 32, a planet carrier 33, a ring gear 34, a first clutch 41 and a second clutch 42. Among them, the first clutch 41 is located on the first main shaft 21, which separates the first main shaft 21 into a first section 211 and a second section 212, and can realize the power on-off between the first section 211 and the second section 212 through the first clutch 41; the second clutch 42 is located on the second main shaft 22 and is in driving connection with the second main shaft 22 and the ring gear 34 respectively, and can realize the power on-off between the first section 211 and the second main shaft 22 through the second clutch 42.

[0044] When the gearbox works, the power of the power source can be transmitted to the first section 211. When the first clutch 41 is separated and the second clutch 42 is combined, the power of the power source can be transmitted to the second main shaft 22 in sequence through the first section 211, the ring gear 34 and the second clutch 42, realizing the first gear mode driving the wheel 13. When the first clutch 41 is combined and the second clutch 42 is separated, part of the power of the power source is transmitted to the planet carrier 33 in sequence through the first section 211, the ring gear 34 and the planetary gear 32, and the other part of the power of the power source is transmitted to the planet carrier 33 in sequence through the first section 211, the first clutch 41, the second section 212, the center wheel 31 and the planetary gear 32. In this way, the two parts of the power of the power source are transmitted to the planet carrier 33 through different paths and coupled at the planet carrier 33, and finally the coupled power is transmitted to the wheel 13 through the second main shaft 22, realizing the second gear mode driving the wheel 13. This kind of variable speed structure can realize multi-gear driving without setting multiple gear trains and synchronizers, which not only simplifies the structure of the gearbox, reduces the space ratio of the gearbox, but also reduces the manufacturing cost.

[0045] Optionally, as Figure 1The transmission mechanism further comprises a first transmission gear 51 and a second transmission gear 52, and the first transmission gear 51 and the second transmission gear 52 are engaged. The first transmission gear 51 is coaxially sleeved outside the first section 211, and the second transmission gear 52 is movably sleeved outside the second main shaft 22. The second transmission gear 52 is in transmission connection with the ring gear 34, and the second transmission gear 52 is in transmission connection with the second clutch 42.

[0046] By arranging the engaged first transmission gear 51 and the second transmission gear 52, the first transmission gear 51 is coaxially connected with the first section 211, and the second transmission gear 52 is coaxially connected with the ring gear 34. In this way, the power of the power source can be transmitted to the ring gear 34 through the first transmission gear 51 and the second transmission gear 52, or only the first transmission gear 51 and the second transmission gear 52 transmit the power to the second clutch 42. So that the power of the power source can be transmitted to the second main shaft 22 by two paths.

[0047] Optionally, as shown in Figure 1 The transmission mechanism further comprises a connecting ring 56, and the outer edge of the connecting ring 56 is coaxially connected with the ring gear 34, and the inner edge of the connecting ring 56 is coaxially connected with the second transmission gear 52.

[0048] In the above implementation, the second transmission gear 52 and the ring gear 34 are coaxially connected together through the connecting ring 56, so that the ring gear 34 and the second transmission gear 52 are arranged as an integrated structure. In this way, the ring gear 34 can directly obtain the power transmitted from the first section 211. Therefore, the planetary gear set 32 can not only obtain power from the first transmission gear 51 at the first end, but also obtain power from the second section 212, so that the planetary gear set 32 has two power transmission paths, and thus different gear driving can be realized.

[0049] Optionally, as shown in Figure 1 The second clutch 42 comprises a flywheel 401 and a driven disc 402 which are coaxially distributed. In the second clutch 42, the flywheel 401 of the second clutch 42 is coaxially sleeved outside the second main shaft 22, and the driven disc 402 of the second clutch 42 is movably sleeved outside the second main shaft 22 and is coaxially connected with the second transmission gear 52.

[0050] The second clutch 42 is connected with the second transmission gear 52 and the second main shaft 22 respectively, so that the power of the power source can also be directly transmitted to the second main shaft 22 through the first section 211, the first transmission gear 51, the second transmission gear 52 and the second clutch 42, realizing a gear mode.

[0051] Exemplarily, as shown in Figure 1As shown, the second transmission gear 52 and the driven disc 402 of the second clutch 42 are spaced, and a connecting cylinder is further arranged between the second transmission gear 52 and the driven disc 402. One end of the connecting cylinder is coaxially connected with the driven disc 402 of the second clutch 42, and the other end of the connecting cylinder is coaxially connected with the second transmission gear 52, and the connecting cylinder is movably sleeved outside the second main shaft 22.

[0052] Optionally, as shown in Figure 1 As shown, the transmission mechanism further comprises a third transmission gear 53, a fourth transmission gear 54 and a hollow shaft 23, and the third transmission gear 53 and the fourth transmission gear 54 are engaged.

[0053] As shown in Figure 1 The third transmission gear 53 is coaxially sleeved outside the second section 212, the fourth transmission gear 54 is coaxially sleeved outside the hollow shaft 23, the hollow shaft 23 is movably sleeved outside the second main shaft 22, and one end of the hollow shaft 23 is coaxially connected with the sun gear 31.

[0054] In the above implementation, since the second section 212 and the sun gear 31 are further connected through two transmission gears and the hollow shaft 23, the power of the power source can also be transmitted to the planetary gear 32 system through the first section 211, the first clutch 41, the second section 212, the third transmission gear 53, the fourth transmission gear 54 and the hollow shaft 23 in turn, so as to realize one gear mode.

[0055] Exemplarily, the first clutch 41 comprises a flywheel 401 and a driven disc 402 which are coaxially distributed, the flywheel 401 of the first clutch 41 is coaxially connected with the first section 211, and the driven disc 402 of the first clutch 41 is coaxially connected with the second section 212.

[0056] By connecting the first section 211 and the second section 212 through the first clutch 41, whether the power of the power source is transmitted to the second section 212 can be controlled. When the first clutch 41 connects the first section 211 and the second section 212, the power can be transmitted to the ring gear 34 through the first transmission gear 51 and the second transmission gear 52, and can also be transmitted to the sun gear 31 through the third transmission gear 53, the fourth transmission gear 54 and the hollow shaft 23, so as to realize one gear mode; when the first clutch 41 separates the first section 211 and the second section 212, the power can only be transmitted to the first transmission gear 51 and the second transmission gear 52, so as to realize another gear mode.

[0057] Optionally, as shown in Figure 1 As shown, the transmission mechanism further comprises a third transmission gear 53, a fourth transmission gear 54 and a hollow shaft 23, and the third transmission gear 53 and the fourth transmission gear 54 are engaged.

[0058] The fifth transmission gear 55 is arranged in transmission connection with the differential 63 and the second main shaft 22, so that the power transmitted from the power source is transmitted to the wheels 13 to drive the vehicle.

[0059] Optionally, as shown in Figure 1 The transmission further comprises a first gear train 61 and a second gear train 62. The input gear of the first gear train 61 is arranged in transmission connection with the power source, and the output gear of the first gear train 61 is coaxially sleeved on the first section 211. The input gear of the second gear train 62 is arranged in transmission connection with the power source, and the output gear of the second gear train 62 is coaxially sleeved on the second main shaft 22.

[0060] The gear train is arranged to connect the stationary power source to the transmission, so as to achieve the purpose of driving the wheels 13 by multiple power sources, thereby improving the power performance of the vehicle.

[0061] In the embodiments of the present disclosure, the first gear train 61 and the second gear train 62 each comprise at least an input gear and an output gear. The input gear and the output gear are the first and last gears in the gear train, respectively, and are in transmission connection, so that the power can be transmitted from the input gear to the output gear.

[0062] Optionally, the input gear and the output gear in the first gear train 61 and the second gear train 62 can be directly meshed to achieve transmission connection between the input gear and the output gear. At least one connecting gear can also be arranged between the input gear and the output gear. For example, when only one connecting gear is arranged, the connecting gear is meshed with the input gear and the output gear, respectively, to achieve transmission connection between the input gear and the output gear.

[0063] It should be noted that the number of gears arranged in the first gear train 61 and the second gear train 62 can be determined according to actual needs. Since the number of gears arranged in the gear train affects the transmission ratio of the gear train, the number of gears in the gear train can be adjusted in combination with the power demand of the vehicle.

[0064] Figure 2 is a structural schematic diagram of a hybrid power system provided by the embodiments of the present disclosure. As shown in Figure 2 The hybrid power system comprises a first power source, a second power source, a third power source, and a transmission as described above. The first power source is an engine 10, the second power source is a first motor 11, and the third power source is a second motor 12.

[0065] The engine 10, the first motor 11, and the second motor 12 are located outside the housing 100. The output shaft of the engine 10 is coaxially connected with the first main shaft 21, the output shaft of the first motor 11 is in transmission connection with the first main shaft 21, and the output shaft of the second motor 12 is in transmission connection with the second main shaft 22.

[0066] For example, the output shaft of the first motor 11 is coaxially connected with the input gear of the first gear train 61, and the output shaft of the second motor 12 is coaxially connected with the input gear of the second gear train 62.

[0067] In the embodiment of the present disclosure, the engine 10, the first motor 11 and the second motor 12 are set as power sources to form a hybrid power system. The hybrid power system can transmit the power of the three power sources to the second main shaft 22 through the gearbox to drive the wheels 13. When the engine 10 is working, the first motor 11 can also be controlled to generate electricity, so that the engine 10 works efficiently and the power performance and endurance of the hybrid power system are improved.

[0068] Optionally, as shown in the figure, the hybrid power system further comprises a power supply assembly 70 located outside the housing 100. The power supply assembly 70 comprises a battery 71 and two inverters 72. One of the two inverters 72 is connected between the battery 71 and the first motor 11, and the other of the two inverters 72 is connected between the battery 71 and the second motor 12.

[0069] By setting two inverters 72, one of which is used to connect the battery 71 and the first motor 11, and the other of which is used to connect the battery 71 and the second motor 12. Among them, the battery 71 is a rechargeable battery 71, and the inverter 72 is arranged on the output circuit of the battery 71, which is used to convert the direct current output by the battery 71 into three-phase alternating current to drive the first motor 11 or the second motor 12. In addition, in the embodiment of the present disclosure, the inverter 72 and the transformer are integrated together, which is convenient for installation and saves installation space.

[0070] The embodiment of the present disclosure provides an automobile, which comprises the hybrid power system and the automobile body as described above, and the hybrid power system is located in the automobile body.

[0071] The hybrid power system provided by the embodiment of the present disclosure can run in any one of the power modes, including pure electric mode, hybrid drive mode, engine 10 direct drive mode and energy recovery mode.

[0072] Figure 3 is a schematic diagram of energy transmission of a hybrid power system provided by the embodiment of the present disclosure in pure electric mode. As shown in the figure, the engine 10 is not working, the first motor 11 is working in generator mode, and the second motor 12 is working in motor mode. Figure 3As shown, in the pure electric mode, the engine 10 and the first motor 11 do not work, the first clutch 41 and the second clutch 42 are not combined, and the vehicle is driven by the second motor 12. The power supply assembly 70 discharges, converts direct current into three-phase alternating current through the inverter 72 to drive the output shaft of the second motor 12 to rotate, the second motor 12 converts electrical energy into mechanical energy and transmits it to the second main shaft 22, and then transmits it to the wheels 13 through the second main shaft 22, the fifth transmission gear 55 and the differential 63, to realize the second motor 12 driving the vehicle running mode.

[0073] Alternatively, the vehicle can also be driven in reverse by the second motor 12 in the pure electric mode. The engine 10 and the first motor 11 do not work, the first clutch 41 and the second clutch 42 are not combined, and the vehicle is driven by the second motor 12. The power supply assembly 70 discharges, converts direct current into three-phase alternating current through the inverter 72 to drive the output shaft of the second motor 12 to rotate, the second motor 12 converts electrical energy into mechanical energy and transmits it to the second main shaft 22, and then transmits it to the wheels 13 through the second main shaft 22, the fifth transmission gear 55 and the differential 63, to drive the wheels 13 to reverse to realize reverse driving.

[0074] In the embodiment of the present disclosure, the hybrid mode includes a series hybrid mode, a parallel one-gear hybrid mode and a parallel two-gear hybrid mode.

[0075] Figure 4 is a schematic diagram of energy transmission of a hybrid power system in a hybrid mode provided by the embodiment of the present disclosure. As shown in the figure, Figure 4 As shown, in the series hybrid mode, the engine 10, the first motor 11 and the second motor 12 work together and jointly drive the vehicle to run. In this mode, the first clutch 41 and the second clutch 42 are not combined, the engine 10 runs in the high efficiency zone to drive the first motor 11 to generate electricity, the generated electrical energy is supplied to the second motor 12 to drive the vehicle to run, and the excess electrical energy is stored in the power supply assembly 70. When the power generation is insufficient, the power supply assembly 70 is used to supplement, and the first motor 11 and the power supply assembly 70 jointly meet the power demand of the second motor 12.

[0076] Figure 5 is a schematic diagram of energy transmission of a hybrid power system in a hybrid mode provided by the embodiment of the present disclosure. As shown in the figure, Figure 5As shown, in the parallel one-gear hybrid mode, the engine 10, the first motor 11 and the second motor 12 work together to jointly drive the vehicle to travel, and can output greater power to improve the vehicle power performance. In this mode, the first clutch 41 is separated, the second clutch 42 is combined, the kinetic energy of the engine 10 and the first motor 11 is transmitted to the second clutch 42 through the first transmission gear 51, the second transmission gear 52 and the ring gear 34, coupled with the kinetic energy of the second motor 12, transmitted to the wheels 13 through the fifth transmission gear 55 and the differential 63, realizing simultaneous driving of the three power sources to drive the vehicle to travel.

[0077] Figure 6 is a schematic diagram of energy transmission of a hybrid power system in the hybrid mode provided by the embodiment of the present disclosure. As shown in the figure, Figure 6 As shown, in the parallel two-gear hybrid mode, the engine 10, the first motor 11 and the second motor 12 work together to jointly drive the vehicle to travel, and can output greater power to improve the vehicle power performance. In this mode, the first clutch 41 is combined, the second clutch 42 is separated, part of the power of the engine 10 and the first motor 11 is transmitted to the ring gear 34 through the first transmission gear 51 and the second transmission gear 52, and the other part of the power is transmitted to the sun gear 31 through the first clutch 41, the third transmission gear 53 and the fourth transmission gear 54, both of which drive the planetary gear 32 and the planet carrier 33 to rotate, and are coupled with the kinetic energy of the second motor 12 at the second main shaft 22, transmitted to the wheels 13 through the fifth transmission gear 55 and the differential 63, realizing simultaneous driving of the three power sources to drive the vehicle to travel.

[0078] In the embodiment of the present disclosure, the engine 10 direct drive mode includes one-gear direct drive mode and two-gear direct drive mode.

[0079] Figure 7 is a schematic diagram of energy transmission of a hybrid power system in the engine 10 direct drive mode provided by the embodiment of the present disclosure. As shown in the figure, Figure 7 As shown, in the one-gear direct drive mode, the engine 10 and the first motor 11 work, the second motor 12 does not work, the first clutch 41 is separated, the second clutch 42 is combined, the power of the engine 10 is transmitted to the second main shaft 22 through the first transmission gear 51, the second transmission gear 52 and the second clutch 42, the vehicle is driven to travel by the power provided by the engine 10, and the first motor 11 operates in the power generation or electric drive mode according to the vehicle speed and torque demand.

[0080] Figure 8 is a schematic diagram of energy transmission of a hybrid power system in the engine 10 direct drive mode provided by the embodiment of the present disclosure. As shown in the figure, Figure 8As shown, in the two-gear direct-drive mode, the engine 10 is working, the second motor 12 is not working, the first clutch 41 is engaged, the second clutch 42 is disengaged, part of the power of the engine 10 is transmitted to the ring gear 34 through the first transmission gear 51 and the second transmission gear 52, and the other part of the power is transmitted to the central wheel 31 through the first clutch 41, the third transmission gear 53 and the fourth transmission gear 54, both of which drive the planetary gear 32 and the carrier 33 to rotate, and the power is further transmitted to the wheels 13 through the fifth transmission gear 55 and the differential 63, so as to drive the vehicle to run. The vehicle is driven to run by the power provided by the engine 10, and the first motor 11 operates in the power generation or electric mode according to the vehicle speed and torque demand.

[0081] Figure 9 is a schematic diagram of energy transmission of a hybrid power system in an energy recovery mode provided by the embodiment of the present disclosure. As shown in the figure, Figure 9 As shown, in the energy recovery mode, when the vehicle is sliding or braking, the power system provides a reverse torque to the vehicle, and part of the kinetic energy of the vehicle is converted into electric energy by the second motor 12 and stored in the power supply assembly 70 for standby. In the sliding and braking working conditions, the second motor 12 is started in the power generation mode, the engine 10 and the first motor 11 are not working, and the kinetic energy of the vehicle is transmitted to the second motor 12 through the wheels 13, the differential 63, the fifth transmission gear 55 and the second main shaft 22 to drive the second motor 12 to generate electricity, and the generated electric energy is stored in the power supply assembly 70, so as to realize the energy recovery function of the second motor 12.

[0082] The above is only an optional embodiment of the present disclosure, and does not limit the present disclosure. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A gearbox, characterized in that, The gearbox includes: a housing (100), a transmission mechanism, a first clutch (41), a second clutch (42), a first main shaft (21), and a second main shaft (22); The transmission mechanism, the first clutch (41) and the second clutch (42) are all located inside the housing (100). The first main shaft (21) and the second main shaft (22) are movably inserted into the housing (100). The first main shaft (21) and the second main shaft (22) are parallel and spaced apart. The second main shaft (22) is used for transmission connection with the wheel (13). The transmission mechanism includes: a center gear (31), multiple planetary gears (32), a planet carrier (33), a ring gear (34), a first clutch (41), and a second clutch (42). The ring gear (34) is coaxially arranged with the center gear (31). The multiple planetary gears (32) are located between the center gear (31) and the ring gear (34), and all of them mesh with the center gear (31) and the ring gear (34). The first main shaft (21) includes a first section (211) and a second section connected by the first clutch (41). (212), the first segment (211) is connected to the gear ring (34) for transmission, and the first segment (211) is used for transmission connection with the power source. The second segment (212) is connected to the center wheel (31) for transmission. The planetary carrier (33) is coaxially sleeved outside the second main shaft (22). The second clutch (42) is connected to the second main shaft (22) and the gear ring (34) for transmission. The second clutch (42) can realize the power connection and disconnection between the first segment (211) and the second main shaft (22). The speed change mechanism further includes a first transmission gear (51) and a second transmission gear (52), wherein the first transmission gear (51) and the second transmission gear (52) mesh. The first transmission gear (51) is coaxially sleeved outside the first section (211), the second transmission gear (52) is movably sleeved outside the second main shaft (22), the second transmission gear (52) is connected to the gear ring (34) in a transmission connection, and the second transmission gear (52) is connected to the second clutch (42) in a transmission connection. The speed change mechanism also includes a connecting ring (56), the outer edge of which is coaxially connected to the gear ring (34), and the inner edge of which is coaxially connected to the second transmission gear (52).

2. The gearbox according to claim 1, characterized in that, The second clutch (42) includes a flywheel and a driven plate that are coaxially distributed. In the second clutch (42), the flywheel of the second clutch (42) is coaxially sleeved outside the second main shaft (22), and the driven plate of the second clutch (42) is movably sleeved outside the second main shaft (22) and coaxially connected to the second transmission gear (52).

3. The gearbox according to claim 1, characterized in that, The speed change mechanism also includes a third transmission gear (53), a fourth transmission gear (54) and a hollow shaft (23), wherein the third transmission gear (53) and the fourth transmission gear (54) mesh; The third transmission gear (53) is coaxially sleeved outside the second section (212), the fourth transmission gear (54) is coaxially sleeved outside the hollow shaft (23), the hollow shaft (23) is movably sleeved outside the second main shaft (22), and one end of the hollow shaft (23) is coaxially connected to the center wheel (31).

4. The gearbox according to any one of claims 1 to 3, characterized in that, The first clutch (41) includes a flywheel and a driven plate that are coaxially distributed. The flywheel of the first clutch (41) is coaxially connected to the first section (211), and the driven plate of the first clutch (41) is coaxially connected to the second section (212).

5. The gearbox according to any one of claims 1 to 3, characterized in that, The gearbox also includes a fifth transmission gear (55) and a differential (63). The fifth transmission gear (55) is coaxially sleeved outside the second main shaft (22). The fifth transmission gear (55) meshes with the input gear of the differential (63). The output shaft of the differential (63) is connected to the wheel (13) in a transmission connection.

6. A hybrid power system, characterized in that, The hybrid power system includes a first power source, a second power source, a third power source, and a gearbox as described in any one of claims 1 to 5, wherein the first power source is an engine (10), the second power source is a first motor (11), and the third power source is a second motor (12); The engine (10), the first motor (11) and the second motor (12) are all located outside the housing (100). The output shaft of the engine (10) is coaxially connected to the first main shaft (21), the output shaft of the first motor (11) is drivenly connected to the first main shaft (21), and the output shaft of the second motor (12) is drivenly connected to the second main shaft (22).

7. The hybrid power system according to claim 6, characterized in that, The hybrid power system also includes a power supply assembly (70) located outside the housing (100). The power supply assembly (70) includes a battery (71) and two inverters (72), one of which is connected between the battery (71) and the first motor (11), and the other of which is connected between the battery (71) and the second motor (12).

8. A car, characterized in that, The vehicle includes a hybrid power system as described in claim 6 or 7 and a vehicle body, wherein the hybrid power system is located within the vehicle body.

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