Gearbox, hybrid power system and automobile

Abstract

The present disclosure belongs to the technical field of vehicle accessories. Provided are a hybrid power transmission system and a vehicle. The hybrid power transmission system comprises an engine (1), first electric motors (2), a second electric motor (3), first clutches (4), a transmission mechanism (5) and an output shaft (6), wherein an output shaft of the engine (1) and output shafts of the first electric motors (2) are coaxial and are drivingly connected by means of the first clutches (4); the output shafts of the first electric motors (2) and an output shaft of the second electric motor (3) are both connected to the output shaft (6) by means of the transmission mechanism (5), and the transmission mechanism (5) is configured to drivingly connect the output shaft (6) to the engine (1), and / or to the first electric motors (2), and / or to the second electric motor (3); and the output shaft (6) is configured to be drivingly connected to wheels (100). In this way, it is not necessary to arrange a pair of gears between the engine (1) and the first electric motors (2) to realize driving connection, thereby reducing the volume of the hybrid power transmission system.

Description

Gearbox, hybrid power system and vehicle

[0001] The present disclosure claims priority to the Chinese patent application No. 202410654164X, filed on May 24, 2024, and entitled "Hybrid power transmission system and vehicle", the entire content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] The present disclosure relates to the technical field of vehicle accessories, in particular to a hybrid power transmission system and vehicle. BACKGROUND

[0003] The hybrid power transmission system is an important component in a hybrid vehicle, which uses an engine and a motor as power sources. This enables the vehicle to realize oil and electric driving modes, thereby combining power performance and economy.

[0004] However, the structure of the hybrid power transmission system in the related art is relatively complex and occupies a large volume, which makes it difficult to arrange the hybrid power transmission system in the vehicle. SUMMARY

[0005] The present disclosure provides a hybrid power transmission system that can reduce the volume of the hybrid power transmission system. The technical solution of the hybrid power transmission system is as follows.

[0006] In a first aspect, the present disclosure provides a hybrid power transmission system, comprising an engine, a first motor, a second motor, a first clutch, a transmission mechanism and an output shaft;

[0007] The output shaft of the engine is coaxial with the output shaft of the first motor and is drivingly connected through the first clutch.

[0008] The output shaft of the first motor and the output shaft of the second motor are both connected to the output shaft through the transmission mechanism, wherein the transmission mechanism is used to drivingly connect the output shaft with the engine, and / or the first motor, and / or the second motor.

[0009] The output shaft is used to drivingly connect with a wheel.

[0010] In a possible implementation, the first motor surrounds the first clutch.

[0011] In a possible implementation, the transmission mechanism comprises a second clutch, a transmission shaft, a first gear train, a second gear train, a gear shifting mechanism and a third gear train, the second clutch is a double clutch comprising a first sub-clutch mechanism and a second sub-clutch mechanism.

[0012] The output shaft of the first motor is in driving connection with the transmission shaft through the first sub-clutch mechanism, the transmission shaft is in driving connection with the input ends of the first and second wheel trains;

[0013] The second motor is in driving connection with the input ends of the first and second wheel trains;

[0014] The output ends of the first and second wheel trains are connected with the output shaft through the gear shifting mechanism, and the gear shifting mechanism can adjust the driving connection of the first wheel train, the first wheel train and the output shaft;

[0015] The input end of the third wheel train is in driving connection with the first motor through the second sub-clutch mechanism, and the input end of the third wheel train is connected with the transmission shaft through the first sub-clutch mechanism and the second sub-clutch mechanism.

[0016] In a possible implementation, the transmission ratio of the first wheel train is greater than the transmission ratio of the third wheel train, and the transmission ratio of the third wheel train is greater than the transmission ratio of the second wheel train.

[0017] In a possible implementation, the hybrid power transmission system has a pure electric driving mode and an engine driving mode;

[0018] In the pure electric driving mode, the first clutch is not engaged, the second motor drives the output shaft to rotate, or the first motor and the second motor jointly drive the output shaft to rotate;

[0019] In the engine driving mode, the first clutch is engaged, the first sub-clutch mechanism, and / or the second sub-clutch mechanism is engaged.

[0020] In a possible implementation, the hybrid power transmission system has a series driving mode and a parallel driving mode;

[0021] In the series driving mode, the first clutch is engaged, the engine drives the first motor to generate electricity, the first motor is used to supply power to the second motor, and the second motor drives the output shaft;

[0022] In the parallel driving mode, the first clutch is engaged, the first sub-clutch mechanism, and / or the second sub-clutch mechanism is engaged, and the engine, the first motor and the second motor jointly drive the output shaft.

[0023] In a possible implementation, the first wheel train includes engaged first and second gears, and the second wheel train includes engaged third and fourth gears;

[0024] The first gear, the third gear and the transmission shaft are connected, the first gear is further connected with the second motor, and the second gear and the fourth gear are sleeved on the output shaft.

[0025] The third gear train comprises a fifth gear and a sixth gear, the fifth gear is sleeved on the transmission shaft and connected with the second sub-clutch mechanism, and the sixth gear is connected with the output shaft.

[0026] In a possible implementation, the second clutch further comprises a first housing connected with the output shaft of the first motor.

[0027] The first sub-clutch mechanism comprises a first clutch plate fixed on the inner side of the first housing in the circumferential direction and a first pressure plate connected with the transmission shaft, and when the first pressure plate engages with the first clutch plate, the first motor is connected with the transmission shaft.

[0028] The second sub-clutch mechanism comprises a second clutch plate fixed on the inner side of the first housing in the circumferential direction and a second pressure plate connected with the third gear train and sleeved on the transmission shaft, and when the second clutch plate engages with the second pressure plate, the first motor is connected with the third gear train.

[0029] In a possible implementation, the second motor comprises a motor body, an output gear and an idler gear.

[0030] The output gear is connected with the motor body, and the idler gear engages with the output gear and the input end of the first gear train.

[0031] In a second aspect, the present disclosure further provides a vehicle comprising the hybrid transmission system according to any one of the first aspect.

[0032] The technical solutions provided by the present disclosure have at least the following beneficial effects:

[0033] The present disclosure provides a hybrid transmission system, in which the engine and the first motor are coaxially arranged and connected through the first clutch. When the engine drives the first motor to generate electricity or drives the output shaft to rotate, the first clutch is engaged. In this way, the engine and the first motor are connected without a pair of gears, thereby reducing one gear shaft. In this way, the size of the hybrid transmission system in the height direction is reduced, so that the hybrid transmission system occupies a smaller volume, which facilitates the arrangement of the hybrid transmission system in the vehicle.

[0034] Additional aspects and advantages of the present disclosure will be made apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0036] FIG. 1 is a structural schematic diagram of a hybrid transmission system according to an embodiment of the present disclosure;

[0037] FIG. 2 is a structural schematic diagram of a hybrid transmission system according to an embodiment of the present disclosure;

[0038] FIG. 3 is a partial structural schematic diagram of a hybrid transmission system according to an embodiment of the present disclosure;

[0039] FIG. 4 is a schematic diagram of a power transmission path of a hybrid transmission system according to an embodiment of the present disclosure;

[0040] FIG. 5 is a schematic diagram of a power transmission path of a hybrid transmission system according to an embodiment of the present disclosure;

[0041] FIG. 6 is a schematic diagram of a power transmission path of a hybrid transmission system according to an embodiment of the present disclosure;

[0042] FIG. 7 is a structural schematic diagram of a hybrid transmission system according to an embodiment of the present disclosure;

[0043] FIG. 8 is a schematic diagram of a power transmission path of a hybrid transmission system in a single-motor mode according to an embodiment of the present disclosure;

[0044] FIG. 9 is a schematic diagram of a power transmission path of a hybrid transmission system in a single-motor mode according to an embodiment of the present disclosure;

[0045] FIG. 10 is a schematic diagram of a power transmission path of a hybrid transmission system in a single-motor mode according to an embodiment of the present disclosure;

[0046] FIG. 11 is a schematic diagram of a power transmission path of a hybrid transmission system in a double-motor mode according to an embodiment of the present disclosure;

[0047] FIG. 12 is a schematic diagram of a power transmission path of a hybrid transmission system in a double-motor mode according to an embodiment of the present disclosure;

[0048] FIG. 13 is a schematic diagram of a power transmission path in a double-motor mode of a hybrid transmission system according to an embodiment of the present disclosure;

[0049] FIG. 14 is a schematic diagram of a power transmission path in a double-motor mode of a hybrid transmission system according to an embodiment of the present disclosure;

[0050] FIG. 15 is a schematic diagram of a power transmission path in a double-motor mode of a hybrid transmission system according to an embodiment of the present disclosure;

[0051] FIG. 16 is a schematic diagram of a power transmission path in an engine drive mode of a hybrid transmission system according to an embodiment of the present disclosure;

[0052] FIG. 17 is a schematic diagram of a power transmission path in an engine drive mode of a hybrid transmission system according to an embodiment of the present disclosure;

[0053] FIG. 18 is a schematic diagram of a power transmission path in an engine drive mode of a hybrid transmission system according to an embodiment of the present disclosure;

[0054] FIG. 19 is a schematic diagram of a power transmission path in a parallel drive mode of a hybrid transmission system according to an embodiment of the present disclosure;

[0055] FIG. 20 is a schematic diagram of a power transmission path in a parallel drive mode of a hybrid transmission system according to an embodiment of the present disclosure;

[0056] FIG. 21 is a schematic diagram of a power transmission path in a parallel drive mode of a hybrid transmission system according to an embodiment of the present disclosure;

[0057] FIG. 22 is a schematic diagram of a power transmission path in a parallel drive mode of a hybrid transmission system according to an embodiment of the present disclosure;

[0058] FIG. 23 is a schematic diagram of a power transmission path in a parallel drive mode of a hybrid transmission system according to an embodiment of the present disclosure.

[0059] Legend: 1, engine; 2, first motor; 3, second motor, 301, motor body, 302, output gear, 303, idler gear; 4, first clutch, 41, second housing, 42, third clutch plate, 43, third pressure plate; 5, transmission mechanism, 51, second clutch, 511, first sub-clutch mechanism, 5111, first clutch plate, 5112, first pressure plate, 512, second sub-clutch mechanism, 5121, second clutch plate, 5122, second pressure plate, 513, first housing, 52, transmission shaft, 53, first train, 531, first gear, 532, second gear, 54, second train, 541, third gear, 542, fourth gear, 55, gear shifting mechanism, 56, third train, 561, fifth gear, 562, sixth gear; 6, output shaft; 7, differential; 100, wheel. DETAILED DESCRIPTION

[0060] Unless otherwise defined, technical terms or scientific terms used herein shall have 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 the like, as used in the description and the claims of this disclosure do not indicate any order, quantity, or importance, but are used to distinguish different components. Similarly, the terms "one", "a", and "an" do not indicate a quantity of one, but rather indicate the presence of at least one. The terms "include", "comprise", and the like, mean that the elements or objects listed after the terms "include", "comprise", and the like, encompass the elements or objects listed after the terms "include", "comprise", and the like, and equivalents thereof, and do not exclude other elements or objects. The terms "connected", "coupled", and the like, do not limit the manner in which the components are connected or coupled, and can include electrical connections, whether direct or indirect. The terms "upper", "lower", "left", "right", and the like, are used only to indicate relative positions, and can change when the absolute positions of the described objects change.

[0061] In order to make the purpose, technical solutions and advantages of the present disclosure clearer, the embodiments of the present disclosure will be further described in detail below with reference to the drawings.

[0062] Embodiments of the present disclosure are described in detail below, and examples of the embodiments are shown in the drawings, in which the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present disclosure, and cannot be understood as limiting the present disclosure.

[0063] The hybrid transmission system is an important component in a hybrid vehicle, which uses an engine and a motor as a power source. The hybrid transmission system enables the vehicle to realize oil and electricity driving mode, thereby having power performance and economy. In the related art, the hybrid transmission system includes an engine, a first motor and a second motor. The engine and the first motor are connected through a pair of gears, so that the engine can drive the first motor to generate electricity. However, the structure of the hybrid transmission system in the related art is relatively complex, and occupies a large volume, which makes it difficult to arrange the hybrid transmission system in the vehicle.

[0064] The hybrid transmission system provided by the embodiments of the present disclosure is shown in FIG. 1 and FIG. 2, which includes an engine 1, a first motor 2, a second motor 3, a first clutch 4, a transmission mechanism 5 and an output shaft 6. The output shaft of the engine 1 is coaxial with the output shaft of the first motor 2, and is connected through the first clutch 4. The output shaft of the first motor 2 and the output shaft of the second motor 3 are both connected with the output shaft 6 through the transmission mechanism 5. The transmission mechanism 5 is used to connect the output shaft 6 with the engine 1, and / or the first motor 2 and / or the second motor 3. The output shaft 6 is used to be connected with a wheel 100.

[0065] The engine 1, the first motor 2 and the second motor 3 are power sources of the hybrid transmission system, and the transmission mechanism 5 is used to switch the power source of the output shaft 6.

[0066] The technical scheme provided by the embodiments of the present disclosure is that the engine 1 and the first motor 2 are coaxially arranged, and are connected through the first clutch 4. When the engine 1 drives the first motor 2 to generate electricity or the engine 1 drives the output shaft 6 to rotate, the first clutch 4 is engaged. In this way, the engine 1 and the first motor 2 do not need to be connected through a pair of gears, thereby reducing one gear shaft. In this way, the size of the hybrid transmission system in the height direction is reduced, thereby reducing the volume occupied by the hybrid transmission system, which facilitates the arrangement of the hybrid transmission system in the vehicle.

[0067] In some examples, the first motor 2 surrounds the first clutch 4.

[0068] The implementation of the transmission mechanism 5 is described below.

[0069] In some examples, as shown in FIG. 2, the gear shifting mechanism 5 includes a second clutch 51, a transmission shaft 52, a first gear train 53, a second gear train 54, a gear shifting mechanism 55, and a third gear train 56. As shown in FIG. 3, the second clutch 51 is a double clutch, including a first sub-clutch mechanism 511 and a second sub-clutch mechanism 512. As shown in FIG. 4, the output shaft of the first motor 2 is in driving connection with the transmission shaft 52 through the first sub-clutch mechanism 511, and the transmission shaft 52 is in driving connection with the input ends of the first gear train 53 and the second gear train 54. As shown in FIG. 2, the second motor 3 is in driving connection with the input ends of the first gear train 53 and the second gear train 54. The output ends of the first gear train 53 and the second gear train 54 are connected with the output shaft 6 through the gear shifting mechanism 55, and the gear shifting mechanism 55 can adjust the driving connection between the first gear train 53, the second gear train 54, and the output shaft 6. As shown in FIG. 5, the input end of the third gear train 56 is in driving connection with the first motor 2 through the second sub-clutch mechanism 512. As shown in FIG. 6, the input end of the third gear train 56 is connected with the transmission shaft 52 through the first sub-clutch mechanism 511 and the second sub-clutch mechanism 512.

[0070] For example, as shown in FIG. 2, the first gear train 53 includes a first gear 531 and a second gear 532 in meshing engagement, and the second gear train 54 includes a third gear 541 and a fourth gear 542 in meshing engagement. The first gear 531 and the fourth gear 542 are connected with the transmission shaft 52, the first gear 531 is also in driving connection with the second motor 3, and the second gear 532 and the fourth gear 542 are sleeved on the output shaft 6. The third gear train 56 includes a fifth gear 561 and a sixth gear 562. The fifth gear 561 is sleeved on the transmission shaft 52 and connected with the second sub-clutch mechanism 512, and the sixth gear 562 is connected with the output shaft 6. The fifth gear 561 and the second sub-clutch mechanism 512 can be connected through a hollow shaft. The hollow shaft is sleeved on the transmission shaft 52, one end of the hollow shaft is connected with the fifth gear 561, and the other end of the hollow shaft is connected with the second sub-clutch mechanism 512.

[0071] The gear shifting mechanism 55 is located between the second gear 532 and the fourth gear 542, and the gear shifting mechanism 55 is in sliding connection with the output shaft 6. When the gear shifting mechanism 55 slides to the second gear 532 and is connected with the second gear 532, the first gear 531 drives the second gear 532 to rotate, and the second gear 532 drives the output shaft 6 to rotate through the gear shifting mechanism 55. When the gear shifting mechanism 55 slides to the fourth gear 542 and is connected with the fourth gear 542, the third gear 541 drives the fourth gear 542 to rotate, and the fourth gear 542 drives the output shaft 6 to rotate through the gear shifting mechanism 55. The side wall of the gear shifting mechanism 55 can have a protrusion, the side wall of the second gear 532 and the fourth gear 542 can have a groove, and the protrusion on the gear shifting mechanism 55 can extend into the groove on the second gear 532 or the fourth gear 542, so that the gear shifting mechanism 55 can be in meshing engagement with the second gear 532 or the fourth gear 542.

[0072] In some examples, the transmission ratio of the first gear train 53 is greater than the transmission ratio of the third gear train 56, and the transmission ratio of the third gear train 56 is greater than the transmission ratio of the second gear train 54. In this way, the transmission mechanism 5 can realize the switching of different gears. When the transmission mechanism 5 drives the output shaft 6 through the first gear train 53, the transmission mechanism 5 is in the first gear. When the transmission mechanism 5 drives the output shaft 6 through the second gear train 54, the transmission mechanism 5 is in the second gear. When the transmission mechanism 5 drives the output shaft 6 through the third gear train 56, the transmission mechanism 5 is in the third gear.

[0073] In some examples, as shown in FIGS. 1 and 2, the second motor 3 includes a motor body 301, an output gear 302, and an idler gear 303. The output gear 302 is connected to the motor body 301, and the idler gear 303 is engaged with the output gear 302 and the input end of the first gear train 53. The idler gear 303 is used to transmit the power of the output gear 302 to the first gear 531 of the first gear train 53, and the idler gear 303 does not change the transmission ratio between the output gear 302 and the first gear 531. After the idler gear 303 is provided, the rotation direction of the first gear 531 can be made the same as the rotation direction of the output gear 302.

[0074] Next, the implementation of the clutch is exemplarily described.

[0075] In some examples, as shown in FIG. 3, the second clutch 51 further includes a first housing 513 connected to the output shaft of the first motor 2. The first sub-clutch mechanism 511 includes a first clutch plate 5111 fixed to the inner side of the first housing 513 in the circumferential direction and a first pressure plate 5112 connected to the transmission shaft 52. When the first pressure plate 5112 is engaged with the first clutch plate 5111, the first motor 2 is connected to the transmission shaft 52.

[0076] The second sub-clutch mechanism 512 includes a second clutch plate 5121 fixed to the inner side of the first housing 513 in the circumferential direction and a second pressure plate 5122 connected to the third gear train 56 and sleeved around the transmission shaft 52. When the second clutch plate 5121 is engaged with the second pressure plate 5122, the first motor 2 is drivingly connected to the third gear train 56.

[0077] When the first pressure plate 5112 is engaged with the first clutch plate 5111 and the second clutch plate 5121 and the second pressure plate 5122 are engaged, the second motor 3 drives the first pressure plate 5112 through the first gear 531 and the transmission shaft 52. The first pressure plate 5112 drives the first housing 513 to rotate through the first clutch plate 5111, and the first housing 513 drives the fifth gear 561 to rotate through the second clutch plate 5121 and the second pressure plate 5122, thereby realizing the driving connection between the second motor 3 and the second gear train 54.

[0078] The first sub clutch mechanism 511 and the second sub clutch mechanism 512 are combined into a double clutch, so that the structure of the first sub clutch mechanism 511 and the second sub clutch mechanism 512 is more compact and small in size, thereby facilitating the reduction of the axial size of the hybrid power transmission system, and further reducing the volume of the hybrid power transmission system.

[0079] In some examples, as shown in FIG. 3, the first clutch 4 includes a second housing 41, a third clutch plate 42, and a third pressure plate 43. The third pressure plate 43 is drivingly connected to the output shaft of the engine 1, and the third clutch plate 42 is fixed to the inside of the second housing 41 in the circumferential direction. The first motor 2 is sleeved on the second housing 41 and is drivingly connected to the second housing 41. When the first clutch 4 is engaged, the third clutch plate 42 and the third pressure plate 43 are engaged, so that the engine 1 drives the third clutch plate 42 to rotate through the third pressure plate 43, and further drives the first motor 2 to rotate through the third clutch plate 42 and the second housing 41.

[0080] In some examples, as shown in FIG. 1 and FIG. 7, the hybrid power transmission system further includes a differential 7, an input shaft of the differential 7 is drivingly connected to the output shaft 6, and an output shaft of the differential 7 is drivingly connected to the wheels 100.

[0081] As shown in FIG. 7, the axis of the motor body 301 of the second motor 3 is A, the axis of the idler 303 is B, the axis of the transmission shaft 52 is C, the axis of the output shaft 6 is D, and the axis of the output shaft of the differential 7 is E. Then, ∠ABC, ∠BCD, and ∠CDE are all less than 180°, so that the structure of the entire hybrid power transmission system is relatively compact.

[0082] For example, ∠ABC is 164.82°±0.5°, ∠BCD is 130°±0.5°, and ∠CDE is 117.25°±0.5°. The center distance L between the transmission shaft 52 and the output shaft of the differential 7 can be 197mm, and the height difference D between the transmission shaft 52 and the output shaft of the differential 7 can be 65mm.

[0083] The hybrid power transmission system is located in a transmission case, and the height difference between the lowest line of the entire transmission case and the ground line is H, then H is 226mm-236mm.

[0084] Next, the working principle of the hybrid power transmission system will be described by way of example.

[0085] In some examples, the hybrid power transmission system has a pure electric driving mode and an engine driving mode. Next, the implementation of the pure electric driving mode and the engine driving mode will be described by way of example. In the drawings, the black bold arrows are the power transmission paths.

[0086] (1) Pure electric drive mode

[0087] In the pure electric drive mode, the first clutch 4 is not engaged, and the second motor 3 drives the output shaft 6 to rotate. Alternatively, the first motor 2 and the second motor 3 jointly drive the output shaft 6 to rotate. The pure electric drive mode has a single motor mode and a double motor mode.

[0088] (a) Single motor mode

[0089] In the single motor mode, neither the engine 1 nor the first motor 2 rotates, and the output shaft 6 is driven to rotate by the second motor 3. The single motor mode has a first gear position, a second gear position, and a third gear position, and is suitable for a case where the vehicle has sufficient electric power or the vehicle is driving at low speed on urban roads.

[0090] In the first gear position of the single motor mode, as shown in FIG. 8, the first clutch 4, the first sub-clutch mechanism 511, and the second sub-clutch mechanism 512 are not engaged. The shift mechanism 55 is engaged with the second gear 532 of the first train 53, and the power of the second motor 3 is transmitted to the output shaft 6 through the first train 53 and the shift mechanism 55 in turn.

[0091] In the second gear position of the single motor mode, as shown in FIG. 9, the first clutch 4, the first sub-clutch mechanism 511, and the second sub-clutch mechanism 512 are not engaged. The shift mechanism 55 is engaged with the fourth gear 542 of the second train 54, and the power of the second motor 3 is transmitted to the output shaft 6 through the second train 54 and the shift mechanism 55 in turn.

[0092] In the third gear position of the single motor mode, as shown in FIG. 10, the first clutch 4 is not engaged, and the first sub-clutch mechanism 511 and the second sub-clutch mechanism 512 are engaged. The power of the second motor 3 is transmitted to the output shaft 6 through the first gear 531, the transmission shaft 52, the first sub-clutch mechanism 511, the second sub-clutch mechanism 512, and the third train 56 in turn.

[0093] (b) Double motor mode

[0094] In the double motor mode, the engine 1 does not rotate, and the output shaft 6 is driven to rotate by the first motor 2 and the second motor 3 simultaneously. The first motor 2 and the second motor 3 can drive the output shaft 6 through the same train, such as the first motor 2 and the second motor 3 driving the first train 53. The first motor 2 and the second motor 3 can also drive the output shaft 6 through different trains, such as the first motor 2 driving the output shaft 6 through the third train 56 while the second motor 3 drives the output shaft through the first train 53. In this way, the function of no power interruption during gear shifting can be achieved. The single motor mode is suitable for a case where the vehicle has sufficient electric power or the vehicle is driving at high speed on urban roads.

[0095] In the dual-motor mode, the hybrid transmission system has a first dual-motor gear, a second dual-motor gear, a third dual-motor gear, a fourth dual-motor gear and a fifth dual-motor gear.

[0096] In the first dual-motor gear, as shown in FIG. 11, the shift mechanism 55 engages with the second gear 532 of the first gear train 53, and the first sub-clutch mechanism 511 is engaged, so that both the first motor 2 and the second motor 3 drive the first gear train 53.

[0097] In the second dual-motor gear, as shown in FIG. 12, the shift mechanism 55 engages with the second gear 532 of the first gear train 53, so that the second motor 3 drives the first gear train 53. Meanwhile, the second sub-clutch mechanism 512 is engaged, so that the first motor 2 drives the third gear train 56.

[0098] In the third dual-motor gear, as shown in FIG. 13, the shift mechanism 55 engages with the fourth gear 542 of the second gear train 54 and the first sub-clutch mechanism 511 is engaged, so that both the first motor 2 and the second motor 3 drive the second gear train 54.

[0099] In the fourth dual-motor gear, as shown in FIG. 14, the shift mechanism 55 engages with the fourth gear 542 of the second gear train 54, and the second motor 3 drives the second gear train 54. Meanwhile, the second sub-clutch mechanism 512 is engaged, and the first motor 2 drives the third gear train 56.

[0100] In the fifth dual-motor gear, as shown in FIG. 15, both the first sub-clutch mechanism 511 and the second sub-clutch mechanism 512 are engaged, and both the first motor 2 and the second motor 3 drive the third gear train 56. At this time, the shift mechanism 55 does not engage with the second gear 532 or the fourth gear 542.

[0101] (2) Engine drive mode

[0102] In the engine drive mode, the first clutch 4 is engaged, the first sub-clutch mechanism 511 is engaged, and / or the second sub-clutch mechanism 512 is engaged. The engine drive mode has a first gear, a second gear and a third gear.

[0103] In the first gear of the engine drive mode, as shown in FIG. 16, both the first clutch 4 and the first sub-clutch mechanism 511 are engaged, and the power of the engine 1 is transmitted to the first gear 531 of the first gear train 53 through the first motor 2, the first sub-clutch mechanism 511 and the transmission shaft 52. The shift mechanism 55 engages with the second gear 532, so that the first gear train 53 drives the output shaft 6 to rotate.

[0104] In the second gear of the engine driving mode, as shown in FIG. 17, the first clutch 4 and the first sub-clutch mechanism 511 are engaged, the power of the engine 1 is transmitted to the third gear 541 of the second gear train 54 through the first motor 2, the first sub-clutch mechanism 511 and the transmission shaft 52. The shift mechanism 55 is engaged with the fourth gear 542, so that the second gear train 54 drives the output shaft 6 to rotate.

[0105] In the third gear of the engine driving mode, as shown in FIG. 18, the first clutch 4 and the second sub-clutch mechanism 512 are engaged, the power of the engine 1 is transmitted to the output shaft 6 through the first motor 2, the second sub-clutch mechanism 512 and the third gear train 56. At this time, the shift mechanism 55 is not engaged with the second gear 532 and the fourth gear 542.

[0106] It should be noted that in the engine driving mode, the first motor 2 rotates but only plays a role in power transmission, i.e. the first motor 2 is not powered at this time, and at this time the first motor 2 can be regarded as a transmission shaft.

[0107] In some examples, the hybrid transmission system has a series driving mode and a parallel driving mode. Next, the implementation of the series driving mode and the parallel driving mode will be exemplarily described.

[0108] (1) Series driving mode

[0109] In the series driving mode, the first clutch 4 is engaged, the engine 1 drives the first motor 2 to generate electricity, the first motor 2 is used to supply power to the second motor 3, and the second motor 3 drives the transmission mechanism 5. The series driving mode can also be called the extended range mode, at this time the engine 1 does not directly drive the output shaft 6, but is only used to drive the first motor 2 to generate electricity. Therefore, in the series driving mode, only the switching of the first gear and the second gear can be realized. If the second gear is to be realized, the first sub-clutch mechanism 511 and the second sub-clutch mechanism 512 need to be engaged at the same time, which will make the engine 1 transmit power to the third gear train 56. The switching of the first gear and the second gear in the series driving mode is similar to the principle of the switching of the first gear and the second gear in the single motor mode, which will not be described here.

[0110] (2) Parallel driving mode

[0111] In the parallel driving mode, the first clutch 4 is engaged, the first sub-clutch mechanism 511 and / or the second sub-clutch mechanism 512 is engaged, and the engine 1, the first motor 2 and the second motor 3 jointly drive the transmission mechanism 5. The parallel driving mode has a first parallel gear, a second parallel gear, a third parallel gear, a fourth parallel gear and a fifth parallel gear.

[0112] In the first parallel gear position, as shown in FIG. 19, the first clutch 4 and the first sub-clutch mechanism 511 are engaged, and the shift mechanism 55 is engaged with the second gear 532 of the first gear train 53. This allows the engine 1, the first motor 2 and the second motor 3 to drive the output shaft 6 through the first gear train 53.

[0113] In the second parallel gear position, as shown in FIG. 20, the first clutch 4 and the second sub-clutch mechanism 512 are engaged, and the shift mechanism 55 is engaged with the second gear 532 of the first gear train 53. This allows the engine 1 and the first motor 2 to drive the output shaft 6 through the third gear train 56, and the second motor 3 to drive the output shaft 6 through the first gear train 53.

[0114] In the third parallel gear position, as shown in FIG. 21, the first clutch 4 and the first sub-clutch mechanism 511 are engaged, and the shift mechanism 55 is engaged with the fourth gear 542 of the second gear train 54. This allows the engine 1, the first motor 2 and the second motor 3 to drive the output shaft 6 through the second gear train 54.

[0115] In the fourth parallel gear position, as shown in FIG. 22, the first clutch 4 and the second sub-clutch mechanism 512 are engaged, and the shift mechanism 55 is engaged with the fourth gear 542 of the second gear train 54. This allows the engine 1 and the first motor 2 to drive the output shaft 6 through the third gear train 56, and the second motor 3 to drive the output shaft 6 through the second gear train 54.

[0116] In the fifth parallel gear position, as shown in FIG. 23, the first clutch 4, the first sub-clutch mechanism 511 and the second sub-clutch mechanism 512 are engaged. This allows the engine 1, the first motor 2 and the second motor 3 to drive the output shaft 6 through the third gear train 56. At this time, the shift mechanism 55 is not engaged with the second gear 532 or the fourth gear 542.

[0117] In some examples, the hybrid transmission system also has a drive charging mode. In the drive charging mode, the first clutch 4 is engaged, and the engine 1 drives the first motor 2 to generate electricity. In the drive charging mode, the hybrid transmission system also has an engine drive mode, which has a similar principle to the engine drive mode described above, and will not be described here.

[0118] In the drive charging mode, the second motor 3 can also drive the output shaft 6. At this time, the principle of switching gears of the hybrid transmission system is similar to that in the parallel drive mode, except that in the drive charging mode, the first motor 2 does not participate in driving but only generates electricity, which will not be described here.

[0119] In some examples, the hybrid transmission system also has a parking charging mode. In the parking charging mode, the first clutch 4 is engaged, and the engine 1 drives the first motor 2 to generate electricity.

[0120] The hybrid transmission system provided by the embodiments of the present disclosure integrates five gear shafts, ten gears and three clutches, realizes separate driving and hybrid driving functions of the engine and the driving motor, and also realizes the power generation function of the generator. In combination with the parameters such as the power torque speed of the engine and the power torque speed of the motor, and in combination with the boundary limit requirements of the whole vehicle and the boundary requirements of the hybrid transmission itself, three gear positions are designed by fully utilizing the space, the whole vehicle arrangement requirements are met under the limited space, and excellent power performance is realized. The design of multiple gear positions fully utilizes the efficient operating point of the engine to realize low fuel consumption performance.

[0121] The embodiments of the present disclosure also provide a vehicle, which comprises the hybrid transmission system described above.

[0122] The above only describes optional embodiments of the present disclosure, and is not used to limit the present disclosure. Any modification, equivalent replacement, improvement, etc. made within the principles of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A hybrid transmission system characterized by, The hybrid transmission system comprises an engine (1), a first motor (2), a second motor (3), a first clutch (4), a transmission mechanism (5) and an output shaft (6); The output shaft of the engine (1) is coaxial with the output shaft of the first motor (2) and is drivingly connected through the first clutch (4); The output shaft of the first motor (2) and the output shaft of the second motor (3) are both connected with the output shaft (6) through the transmission mechanism (5), wherein the transmission mechanism (5) is used for drivingly connecting the output shaft (6) with the engine (1), the first motor (2) and / or the second motor (3); The output shaft (6) is used for drivingly connecting with a wheel (100).

2. The hybrid transmission system of claim 1, wherein, The first motor (2) surrounds the first clutch (4).

3. The hybrid transmission system of claim 1, wherein, The transmission mechanism (5) comprises a second clutch (51), a transmission shaft (52), a first gear train (53), a second gear train (54), a gear shifting mechanism (55) and a third gear train (56), the second clutch (51) is a double clutch comprising a first sub clutch mechanism (511) and a second sub clutch mechanism (512); The output shaft of the first motor (2) is drivingly connected with the transmission shaft (52) through the first sub clutch mechanism (511), the transmission shaft (52) is drivingly connected with the input ends of the first gear train (53) and the second gear train (54); The second motor (3) is drivingly connected with the input ends of the first gear train (53) and the second gear train (54); The output ends of the first gear train (53) and the second gear train (54) are connected with the output shaft (6) through the gear shifting mechanism (55), and the gear shifting mechanism (55) can adjust the driving connection of the first gear train (53), the first gear train (53) and the output shaft (6); The input end of the third gear train (56) is drivingly connected with the first motor (2) through the second sub clutch mechanism (512), and the input end of the third gear train (56) is connected with the transmission shaft (52) through the first sub clutch mechanism (511) and the second sub clutch mechanism (512).

4. The hybrid transmission system of claim 3, wherein The transmission ratio of the first gear train (53) is greater than that of the third gear train (56), and the transmission ratio of the third gear train (56) is greater than that of the second gear train (54).

5. The hybrid transmission system of claim 3, wherein The hybrid transmission system has a pure electric driving mode and an engine driving mode; In the pure electric driving mode, the first clutch (4) is not engaged, the second motor (3) drives the output shaft (6) to rotate, or the first motor (2) and the second motor (3) jointly drive the output shaft (6) to rotate; In the engine driving mode, the first clutch (4) is engaged, and the first sub clutch mechanism (511) and / or the second sub clutch mechanism (512) is engaged.

6. The hybrid transmission system of claim 3, wherein, The hybrid transmission system has a series driving mode and a parallel driving mode; In the series driving mode, the first clutch (4) is engaged, the engine (1) drives the first motor (2) to generate electricity, the first motor (2) is used to supply power to the second motor (3), and the second motor (3) drives the output shaft (6); In the parallel driving mode, the first clutch (4) is engaged, the first sub-clutch mechanism (511) and / or the second sub-clutch mechanism (512) are engaged, and the engine (1), the first motor (2) and the second motor (3) jointly drive the output shaft (6).

7. The hybrid transmission system according to any one of claims 3-6, characterized in that, The first gear train (53) comprises an engaged first gear (531) and a second gear (532), and the second gear train (54) comprises an engaged third gear (541) and a fourth gear (542); The first gear (531) and the third gear (541) are connected with the transmission shaft (52), the first gear (531) is also in transmission connection with the second motor (3), and the second gear (532) and the fourth gear (542) are sleeved on the output shaft (6); The third gear train (56) comprises a fifth gear (561) and a sixth gear (562), the fifth gear (561) is sleeved on the transmission shaft (52) and connected with the second sub-clutch mechanism (512), and the sixth gear (562) is connected with the output shaft (6).

8. The hybrid transmission system of any one of claims 3-6, wherein, The second clutch (51) further comprises a first housing (513), and the first housing (513) is connected with an output shaft of the first motor (2); The first sub-clutch mechanism (511) comprises a first clutch plate (5111) and a first pressure plate (5112), the first clutch plate (5111) is fixed to the inner side of the first housing (513) in the circumferential direction, the first pressure plate (5112) is connected with the transmission shaft (52), and when the first pressure plate (5112) is engaged with the first clutch plate (5111), the first motor (2) is connected with the transmission shaft (52); The second sub-clutch mechanism (512) comprises a second clutch plate (5121) and a second pressure plate (5122), the second clutch plate (5121) is fixed to the inner side of the first housing (513) in the circumferential direction, the second pressure plate (5122) is connected with the third gear train (56) and sleeved on the transmission shaft (52), and when the second clutch plate (5121) is engaged with the second pressure plate (5122), the first motor (2) is in transmission connection with the third gear train (56).

9. The hybrid transmission system according to any one of claims 1-6, characterized in that, The second motor (3) comprises a motor body (301), an output gear (302) and an idler gear (303); The output gear (302) is connected with the motor body (301), and the idler gear (303) is engaged with the output gear (302) and the input end of the first gear train (53).

10. A vehicle characterized by comprising: The vehicle comprises the hybrid transmission system according to any one of claims 1-9.

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