Hybrid transmission system and vehicle

Abstract

This disclosure provides a hybrid power transmission system and a vehicle, belonging to the field of vehicle component technology. The hybrid power transmission system includes an engine, a first motor, a second motor, a first clutch, a transmission mechanism, and an output shaft. The output shaft of the engine is coaxial with the output shaft of the first motor and is drivenly connected via the first clutch. The output shafts of both the first and second motors are connected to the output shafts via the transmission mechanism, wherein the transmission mechanism is used to drively connect the output shaft to the engine and / or, the first motor and / or, the second motor. The output shaft is used to connect to the wheels. In this way, the transmission connection between the engine and the first motor does not require a pair of gears, thus reducing one gear shaft. This reduces the height dimension of the hybrid power transmission system, resulting in a smaller volume occupied by the system, which facilitates its placement in a vehicle.

Description

Technical Field

[0001] This disclosure relates to the field of vehicle parts technology, and in particular to a hybrid power transmission system and a vehicle. Background Technology

[0002] The hybrid transmission system is a crucial component of hybrid vehicles, using both an engine and an electric motor as power sources. This allows the vehicle to operate in both gasoline and electric modes, thus achieving a balance between power and fuel economy.

[0003] However, the hybrid transmission system in the relevant technology has a relatively complex structure and occupies a large volume, making it difficult to install the hybrid transmission system in the vehicle. Summary of the Invention

[0004] This disclosure provides a hybrid power transmission system that can solve the technical problems existing in related technologies. The technical solution of the hybrid power transmission system is as follows.

[0005] In a first aspect, this disclosure provides a hybrid power transmission system, which includes an engine, a first motor, a second motor, a first clutch, a transmission mechanism, and an output shaft;

[0006] The output shaft of the engine is coaxial with the output shaft of the first motor and is connected by the first clutch.

[0007] The output shafts of the first motor and the second motor are both connected to the output shaft via the speed change mechanism, wherein the speed change mechanism is used to drive the output shaft to the engine, and / or the first motor, and / or the second motor;

[0008] The output shaft is used to connect to the wheel drive.

[0009] In one possible implementation, the first motor loops around the first clutch.

[0010] In one possible implementation, the transmission mechanism includes a second clutch, a drive shaft, a first gear train, a second gear train, a shifting mechanism, and a third gear train. The second clutch is a dual clutch, including a first sub-clutch mechanism and a second sub-clutch mechanism.

[0011] The output shaft of the first motor is connected to the transmission shaft via the first sub-clutch mechanism, and the transmission shaft is connected to the input ends of the first gear train and the second gear train.

[0012] The second motor is connected to the input ends of the first gear train and the second gear train in a transmission connection;

[0013] The output ends of the first gear train and the second gear train are connected to the output shaft through the shifting mechanism, and the shifting mechanism can adjust the transmission connection between the first gear train and the output shaft;

[0014] The input end of the third gear train is connected to the first motor via the second sub-clutch mechanism, and the input end of the third gear train is connected to the drive shaft via the first sub-clutch mechanism and the second sub-clutch mechanism.

[0015] In one possible implementation, the gear ratio of the first gear train is greater than the gear ratio of the third gear train, and the gear ratio of the third gear train is greater than the gear ratio of the second gear train.

[0016] In one possible implementation, the hybrid transmission system has a pure electric drive mode and an engine drive mode;

[0017] In the pure electric drive mode, the first clutch is not engaged, and the second motor drives the output shaft to rotate; or, the first motor and the second motor jointly drive the output shaft to rotate.

[0018] In the engine drive mode, the first clutch is engaged, the first sub-clutch mechanism is engaged, and / or the second sub-clutch mechanism is engaged.

[0019] In one possible implementation, the hybrid transmission system has a series drive mode and a parallel drive mode;

[0020] In the series drive mode, the first clutch is engaged, the engine drives the first motor to generate electricity, the first motor supplies power to the second motor, and the second motor drives the output shaft;

[0021] In the parallel drive mode, the first clutch is engaged, the first sub-clutch mechanism is engaged, and / or the second sub-clutch mechanism is engaged, and the engine, the first motor, and the second motor jointly drive the output shaft.

[0022] In one possible implementation, the first gear train includes a meshing first gear and a second gear, and the second gear train includes a meshing third gear and a fourth gear;

[0023] The first gear and the third gear are connected to the drive shaft. The first gear is also connected to the second motor. The second gear and the fourth gear are ring-fitted around the output shaft.

[0024] The third gear train includes a fifth gear and a sixth gear. The fifth gear is looped around the drive shaft and connected to the second sub-clutch mechanism. The sixth gear is connected to the output shaft.

[0025] In one possible implementation, the second clutch further includes a first housing connected to the output shaft of the first motor;

[0026] The first sub-clutch mechanism includes a first clutch plate and a first pressure plate. The first clutch plate is fixed circumferentially to the inner side of the first housing. The first pressure plate is connected to the drive shaft. When the first pressure plate is engaged with the first clutch plate, the first motor is connected to the drive shaft.

[0027] The second sub-clutch mechanism includes a second clutch plate and a second pressure plate. The second clutch plate is fixed circumferentially to the inner side of the first housing. The second pressure plate is connected to the third gear train and is sleeved around the drive shaft. When the second clutch plate and the second pressure plate are engaged, the first motor is connected to the third gear train for transmission.

[0028] In one possible implementation, the second motor includes a motor body, an output gear, and an idler gear;

[0029] The output gear is connected to the motor body, and the idler gear meshes with the output gear and the input end of the first gear train.

[0030] Secondly, this disclosure also provides a vehicle that includes a hybrid power transmission system as described in any of the first aspects.

[0031] The technical solution provided in this disclosure includes at least the following beneficial effects:

[0032] This disclosure provides a hybrid power transmission system in which an engine and a first electric motor are arranged coaxially and connected by a first clutch. The first clutch engages when the engine drives the first motor to generate electricity or when the engine drives the output shaft to rotate. This eliminates the need for a pair of gears to connect the engine and the first electric motor, thus reducing the number of gear shafts. This reduces the height dimension of the hybrid power transmission system, resulting in a smaller footprint and facilitating its installation in a vehicle.

[0033] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0034] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. In the drawings:

[0035] Figure 1This is a schematic diagram of the structure of a hybrid power transmission system shown in an embodiment of this disclosure;

[0036] Figure 2 This is a schematic diagram of the structure of a hybrid power transmission system shown in an embodiment of this disclosure;

[0037] Figure 3 This is a partial structural schematic diagram of a hybrid power transmission system shown in an embodiment of this disclosure;

[0038] Figure 4 This is a schematic diagram of the power transmission path of a hybrid power transmission system according to an embodiment of the present disclosure;

[0039] Figure 5 This is a schematic diagram of the power transmission path of a hybrid power transmission system according to an embodiment of the present disclosure;

[0040] Figure 6 This is a schematic diagram of the power transmission path of a hybrid power transmission system according to an embodiment of the present disclosure;

[0041] Figure 7 This is a schematic diagram of the structure of a hybrid power transmission system shown in an embodiment of this disclosure;

[0042] Figure 8 This is a schematic diagram of the power transmission path in a single-motor mode of a hybrid transmission system according to an embodiment of the present disclosure;

[0043] Figure 9 This is a schematic diagram of the power transmission path in a single-motor mode of a hybrid transmission system according to an embodiment of the present disclosure;

[0044] Figure 10 This is a schematic diagram of the power transmission path in a single-motor mode of a hybrid transmission system according to an embodiment of the present disclosure;

[0045] Figure 11 This is a schematic diagram of the power transmission path in a dual-motor mode of a hybrid transmission system according to an embodiment of the present disclosure;

[0046] Figure 12 This is a schematic diagram of the power transmission path in a dual-motor mode of a hybrid transmission system according to an embodiment of the present disclosure;

[0047] Figure 13 This is a schematic diagram of the power transmission path in a dual-motor mode of a hybrid transmission system according to an embodiment of the present disclosure;

[0048] Figure 14 This is a schematic diagram of the power transmission path in a dual-motor mode of a hybrid transmission system according to an embodiment of the present disclosure;

[0049] Figure 15 This is a schematic diagram of the power transmission path in a dual-motor mode of a hybrid transmission system according to an embodiment of the present disclosure;

[0050] Figure 16 This is a schematic diagram of the power transmission path in the engine drive mode of a hybrid transmission system according to an embodiment of the present disclosure;

[0051] Figure 17 This is a schematic diagram of the power transmission path in the engine drive mode of a hybrid transmission system according to an embodiment of the present disclosure;

[0052] Figure 18 This is a schematic diagram of the power transmission path in the engine drive mode of a hybrid transmission system according to an embodiment of the present disclosure;

[0053] Figure 19 This is a schematic diagram of the power transmission path in the parallel drive mode of a hybrid transmission system according to an embodiment of the present disclosure;

[0054] Figure 20 This is a schematic diagram of the power transmission path in the parallel drive mode of a hybrid transmission system according to an embodiment of the present disclosure;

[0055] Figure 21 This is a schematic diagram of the power transmission path in the parallel drive mode of a hybrid transmission system according to an embodiment of the present disclosure;

[0056] Figure 22 This is a schematic diagram of the power transmission path in the parallel drive mode of a hybrid transmission system according to an embodiment of the present disclosure;

[0057] Figure 23 This is a schematic diagram of the power transmission path in the parallel drive mode of a hybrid transmission system according to an embodiment of this disclosure.

[0058] Legend:

[0059] 1. Engine;

[0060] 2. First motor;

[0061] 3. Second motor; 301. Motor body; 302. Output gear; 303. Idler gear;

[0062] 4. First clutch; 41. Second housing; 42. Third clutch disc; 43. Third pressure plate;

[0063] 5. Transmission mechanism; 51. Second clutch; 511. First sub-clutch mechanism; 5111. First clutch disc; 5112. First pressure plate; 512. Second sub-clutch mechanism; 5121. Second clutch disc; 5122. Second pressure plate; 513. First housing; 52. Drive shaft; 53. First gear train; 531. First gear; 532. Second gear train; 54. Second gear train; 541. Third gear; 542. Fourth gear; 55. Shifting mechanism; 56. Third gear train; 561. Fifth gear; 562. Sixth gear;

[0064] 6. Output shaft;

[0065] 7. Differential.

[0066] The accompanying drawings have illustrated specific embodiments of this disclosure, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concepts of this disclosure to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0067] To make the objectives, technical solutions, and advantages of this disclosure clearer, the embodiments of this disclosure will be further described in detail below with reference to the accompanying drawings.

[0068] The terminology used in the embodiments of this disclosure is for illustrative purposes only and is not intended to limit the disclosure. Unless otherwise defined, the technical or scientific terms used herein should be understood in their ordinary sense by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” “third,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “a” or “one,” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “comprising,” “including,” and similar terms mean that the elements or objects preceding “comprising” or “including” encompass the elements or objects listed following “comprising” or “including” and their equivalents, and do not exclude other elements or objects. The terms “connected,” “linked,” and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms “upper,” “lower,” “left,” “right,” etc., are used only to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described object changes.

[0069] The hybrid transmission system is a crucial component of hybrid vehicles, utilizing both an engine and an electric motor as power sources. This allows the vehicle to operate in both gasoline and electric modes, thus achieving a balance between power and fuel economy. In related technologies, the hybrid transmission system includes an engine, a first electric motor, and a second electric motor. The engine and the first electric motor are connected via a gear transmission, enabling the engine to drive the first electric motor to generate electricity. However, the hybrid transmission systems in these technologies have a relatively complex structure and occupy a large volume, making their installation within the vehicle challenging.

[0070] This disclosure provides a hybrid power transmission system, such as... Figure 1 and Figure 2 As shown, the hybrid transmission system 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 via the first clutch 4. The output shafts of both the first motor 2 and the second motor 3 are connected to the output shaft 6 via the transmission mechanism 5. The transmission mechanism 5 is used to drive the output shaft 6 to the engine 1, and / or the first motor 2 and / or the second motor 3. The output shaft 6 is used to drive the wheels 100.

[0071] Among them, engine 1, first motor 2 and second motor 3 are the power sources of the hybrid transmission system, and transmission mechanism 5 is used to switch the power source of output shaft 6.

[0072] The technical solution provided in this disclosure involves an engine 1 and a first motor 2 arranged coaxially and connected by a first clutch 4. The first clutch 4 engages when the engine 1 drives the first motor 2 to generate electricity or when the engine 1 drives the output shaft 6 to rotate. This eliminates the need for a pair of gears to connect the engine 1 and the first motor 2, thus reducing the number of gear shafts. This reduces the height dimension of the hybrid transmission system, resulting in a smaller overall volume and facilitating its installation in a vehicle.

[0073] In some examples, the first motor 2 loops around the first clutch 4.

[0074] The following is an exemplary description of how the transmission mechanism 5 is implemented.

[0075] In some examples, such as Figure 2 As shown, the transmission mechanism 5 includes a second clutch 51, a drive shaft 52, a first gear train 53, a second gear train 54, a shifting mechanism 55, and a third gear train 56. Figure 3 As shown, the second clutch 51 is a dual clutch, including a first sub-clutch mechanism 511 and a second sub-clutch mechanism 512. Figure 4As shown, the output shaft of the first motor 2 is connected to the transmission shaft 52 via a first sub-clutch mechanism 511. The transmission shaft 52 is connected to the input ends of the first gear train 53 and the second gear train 54. The second motor 3 is connected to 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 to the output shaft 6 via a shifting mechanism 55, and the shifting mechanism 55 can adjust the transmission connection between the first gear train 53, the second gear train 54, and the output shaft 6. Figure 5 As shown, the input end of the third gear train 56 is connected to the first motor 2 via the second sub-clutch mechanism 512. (As indicated...) Figure 6 As shown, the input end of the third gear train 56 is connected to the drive shaft 52 through the first sub-clutch mechanism 511 and the second sub-clutch mechanism 512.

[0076] For example, such as Figure 2 As shown, the first gear train 53 includes a meshing first gear 531 and a second gear 532, and the second gear train 54 includes meshing third gear 541 and fourth gear 542. The first gear 531 and fourth gear 542 are connected to the drive shaft 52. The first gear 531 is also connected to the second motor 3. The second gear 532 and fourth gear 542 are rings around the output shaft 6. The third gear train 56 includes a fifth gear 561 and a sixth gear 562. The fifth gear 561 is ringed around the drive shaft 52 and connected to the second sub-clutch mechanism 512. The sixth gear 562 is connected to the output shaft 6. The fifth gear 561 and the second sub-clutch mechanism 512 can be connected via a hollow shaft.

[0077] The shift mechanism 55 is located between the second gear 532 and the fourth gear 542, and is slidably connected to the output shaft 6. When the shift mechanism 55 slides to and connects 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 via the shift mechanism 55. When the shift mechanism 55 slides to and connects 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 via the shift mechanism 55.

[0078] In some examples, the gear ratio of the first gear train 53 is greater than that of the third gear train 56, and the gear ratio of the third gear train 56 is greater than that of the second gear train 54. This allows the transmission mechanism 5 to switch between different gears. When the transmission mechanism 5 drives the output shaft 6 through the first gear train 53, it is in the first gear. When the transmission mechanism 5 drives the output shaft 6 through the second gear train 54, it is in the second gear. When the transmission mechanism 5 drives the output shaft 6 through the third gear train 56, it is in the third gear.

[0079] In some examples, such as Figure 1 and Figure 2 As shown, 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 meshes with the output gear 302 and the input end of the first gear train 53.

[0080] The following is an exemplary description of how a clutch is implemented.

[0081] In some examples, such as Figure 3 As shown, the second clutch 51 also includes a first housing 513, which is connected to the output shaft of the first motor 2. The first sub-clutch mechanism 511 includes a first clutch disc 5111 and a first pressure plate 5112. The first clutch disc 5111 is circumferentially fixed to the inner side of the first housing 513, and the first pressure plate 5112 is connected to the drive shaft 52. When the first pressure plate 5112 engages with the first clutch disc 5111, the first motor 2 is connected to the drive shaft 52.

[0082] The second clutch mechanism 512 includes a second clutch disc 5121 and a second pressure plate 5122. The second clutch disc 5121 is circumferentially fixed to the inner side of the first housing 513. The second pressure plate 5122 is connected to the third gear train 56 and is ring-encircled by the drive shaft 52. When the second clutch disc 5121 and the second pressure plate 5122 are engaged, the first motor 2 is driven by the third gear train 56.

[0083] When the first pressure plate 5112 is engaged with the first clutch disc 5111 and the second clutch disc 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 disc 5111, and the first housing 513 drives the fifth gear 561 to rotate through the second clutch disc 5121 and the second pressure plate 5122, thereby realizing the transmission connection between the second motor 3 and the second gear train 54.

[0084] The first sub-clutch mechanism 511 and the second sub-clutch mechanism 512 are combined to form a dual clutch. This makes the structure of the first sub-clutch mechanism 511 and the second sub-clutch mechanism 512 more compact and smaller in size, which helps to reduce the axial dimension of the hybrid transmission system and thus reduce the volume of the hybrid transmission system.

[0085] In some examples, such as Figure 3As shown, the first clutch 4 includes a second housing 41, a third clutch disc 42, and a third pressure plate 43. The third pressure plate 43 is drive-connected to the output shaft of the engine 1, and the third clutch disc 42 is circumferentially fixed inside the second housing 41. The first motor 2 is fitted around the second housing 41 and is drive-connected to the second housing 41. When the first clutch 4 is engaged, the third clutch disc 42 and the third pressure plate 43 engage, causing the engine 1 to drive the third pressure plate 43 to rotate via the third clutch disc 42, which in turn drives the first motor 2 to rotate via the third clutch disc 42 and the second housing 41.

[0086] In some examples, such as Figure 1 and Figure 7 As shown, the hybrid transmission system also includes a differential 7, the input shaft of which is connected to the output shaft 6, and the output shaft of which is connected to the wheel 100.

[0087] like Figure 7 As shown, let the axis of the motor body 301 of the second motor 3 be A, the axis of the idler wheel 303 be B, the axis of the drive shaft 52 be C, the axis of the output shaft 6 be D, and the axis of the output shaft of the differential 7 be E. Then ∠ABC, ∠BCD, and ∠CDE are all less than 180°, which makes the structure of the entire hybrid transmission system more compact.

[0088] 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 drive shaft 52 and the output shaft of the differential 7 can be 197mm, and the height difference D between the drive shaft 52 and the output shaft of the differential 7 can be 65mm.

[0089] The hybrid transmission system is located in the gearbox. Let H be the height difference between the lowest design line of the gearbox and the ground line. Then H is 226mm-236mm.

[0090] The working principle of a hybrid transmission system will be explained below by way of example.

[0091] In some examples, the hybrid transmission system has both a pure electric drive mode and an engine drive mode. The implementation methods of the pure electric drive mode and the engine drive mode are illustrated below.

[0092] (1) Pure electric drive mode

[0093] In 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 includes both single-motor and dual-motor modes.

[0094] (a) Single motor mode

[0095] In single-motor mode, neither engine 1 nor the first motor 2 rotates; instead, the output shaft 6 is driven to rotate by the second motor 3. The single-motor mode has three gears: a first gear, a second gear, and a third gear, suitable for situations where the vehicle has sufficient battery power or is traveling at low speeds in urban areas.

[0096] In the first gear of single motor mode, such as Figure 8 As shown, the first clutch 4, the first sub-clutch mechanism 511, and the second sub-clutch mechanism 512 are not engaged. The shifting mechanism 55 engages with the second gear 532 of the first gear train 53, and the power of the second motor 3 is transmitted to the output shaft 6 sequentially through the first gear train 53 and the shifting mechanism 55.

[0097] In the second gear of single motor mode, such as Figure 9 As shown, the first clutch 4, the first sub-clutch mechanism 511, and the second sub-clutch mechanism 512 are not engaged. The shifting mechanism 55 engages with the fourth gear 542 of the second gear train 54, and the power of the second motor 3 is transmitted to the output shaft 6 sequentially through the second gear train 54 and the shifting mechanism 55.

[0098] In the third gear of single-motor mode, such as Figure 10 As shown, the first clutch 4 is not engaged, while the first sub-clutch mechanism 511 and the second sub-clutch mechanism 512 are both engaged. The power of the second motor 3 is transmitted to the output shaft 6 sequentially through the first gear 531, the transmission shaft 52, the first sub-clutch mechanism 511, the second sub-clutch mechanism 512 and the third gear train 56.

[0099] (b) Dual motor mode

[0100] In dual-motor mode, engine 1 does not rotate; instead, output shaft 6 is driven to rotate simultaneously by first motor 2 and second motor 3. First motor 2 and second motor 3 can drive output shaft 6 through the same gear train, such as both driving the first gear train 53. Alternatively, first motor 2 and second motor 3 can drive output shaft 6 through different gear trains, such as first motor 2 driving output shaft 6 through a third gear train 56, while second motor 3 drives output shaft 6 through the first gear train 53. This allows for uninterrupted power during gear shifts. Single-motor mode is suitable when the vehicle has sufficient battery power or when the vehicle is traveling at high speeds on urban roads.

[0101] In 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.

[0102] In the first dual-motor mode, such as Figure 11As shown, the shift mechanism 55 engages with the first gear train 53, and the first sub-clutch mechanism 511 engages, so that both the first motor 2 and the second motor 3 drive the first gear train 53.

[0103] In the second dual-motor mode, such as Figure 12 As shown, the shifting mechanism 55 engages with the first gear train 53, causing the second motor 3 to drive the first gear train 53. At the same time, the second sub-clutch mechanism 512 engages, causing the first motor 2 to drive the third gear train 56.

[0104] In the third dual-motor mode, such as Figure 13 As shown, the shift mechanism 55 engages with the second gear train 54 and the first sub-clutch mechanism 511 engages, so that both the first motor 2 and the second motor 3 drive the second gear train 54.

[0105] In the fourth dual-motor mode, such as Figure 14 As shown, the shift mechanism 55 engages with the second gear train 54, and the second motor 3 drives the second gear train 54. At the same time, the second sub-clutch mechanism 512 engages, and the first motor 2 drives the third gear train 56.

[0106] In the fifth dual-motor mode, such as Figure 15 As shown, the first sub-clutch mechanism 511 and the second sub-clutch mechanism 512 are both engaged, and the first motor 2 and the second motor 3 both drive the third gear train 56.

[0107] (2) Engine drive mode

[0108] In engine-driven 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-driven mode has a first gear, a second gear, and a third gear.

[0109] In the first gear of engine drive mode, such as Figure 16 As shown, the first clutch 4 and the first sub-clutch mechanism 511 are both engaged, and the power of the engine 1 is transmitted to the first gear train 53 through the first motor 2, the first sub-clutch mechanism 511 and the drive shaft 52. The shift mechanism 55 engages with the second gear 532, causing the first gear train 53 to drive the output shaft 6 to rotate.

[0110] In the second gear of engine drive mode, such as Figure 17 As shown, the first clutch 4 and the first sub-clutch mechanism 511 are both engaged, and the power of the engine 1 is transmitted to the second gear train 54 through the first motor 2, the first sub-clutch mechanism 511 and the drive shaft 52. The shift mechanism 55 engages with the fourth gear 542, causing the second gear train 54 to drive the output shaft 6 to rotate.

[0111] In the third gear of engine drive mode, such as Figure 18As shown, the first clutch 4 and the second sub-clutch mechanism 512 are both engaged, and 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.

[0112] It should be noted that in engine-driven mode, although the first motor 2 rotates, it only serves to transmit power, that is, the first motor 2 is not energized. In this case, the first motor 2 can be regarded as a drive shaft.

[0113] In some examples, the hybrid transmission system has both series drive mode and parallel drive mode. The implementation methods of series drive mode and parallel drive mode are illustrated below.

[0114] (1) Series drive mode

[0115] In series drive mode, the first clutch 4 engages, and the engine 1 drives the first motor 2 to generate electricity. The first motor 2 then supplies power to the second motor 3, which in turn drives the transmission mechanism 5. Series drive mode can also be called range-extending mode. In this mode, the engine 1 does not directly drive the output shaft 6, but only drives the first motor 2 to generate electricity. Therefore, in series drive mode, only the first and second gears can be switched. To achieve the second gear, the first sub-clutch mechanism 511 and the second sub-clutch mechanism 512 need to engage simultaneously, which will cause the engine 1 to transmit power to the third gear train 56. The switching between the first and second gears in series drive mode is similar in principle to that in single-motor mode, and will not be elaborated further here.

[0116] (2) Parallel drive mode

[0117] In parallel drive 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 transmission mechanism 5. The parallel drive mode has a first parallel gear, a second parallel gear, a third parallel gear, a fourth parallel gear, and a fifth parallel gear.

[0118] In the first parallel gear, such as Figure 19 As shown, the first clutch 4 and the first sub-clutch mechanism 511 are both engaged, and the shifting 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 all drive the output shaft 6 through the first gear train 53.

[0119] In the second parallel gear position, such as Figure 20 As shown, the first clutch 4 and the second sub-clutch mechanism 512 are both engaged, and the shifting 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 transmission 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.

[0120] In the third parallel gear, such as Figure 21 As shown, the first clutch 4 and the first sub-clutch mechanism 511 are both engaged, and the shifting 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 all drive the output shaft 6 through the second gear train 54.

[0121] In the fourth parallel gear, such as Figure 22 As shown, the first clutch 4 and the second sub-clutch mechanism 512 are both engaged, and the shifting 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 transmission 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.

[0122] In the fifth parallel gear, such as Figure 23 As shown, the first clutch 4, the first sub-clutch mechanism 511, and the second sub-clutch mechanism 512 are all engaged. This allows the engine 1, the first motor 2, and the second motor 3 to drive the output shaft 6 via the third gear train 56.

[0123] In some examples, the hybrid transmission system also features a driving-charging mode. In driving-charging mode, the first clutch 4 engages, and the engine 1 drives the first electric motor 2 to generate electricity. The hybrid transmission system also features an engine-driven mode in driving-charging mode; the principle of the engine-driven mode in driving-charging mode is similar to that described above, and will not be repeated here.

[0124] In driving charging mode, the second motor 3 can also participate in driving the output shaft 6. At this time, the principle of gear switching of the hybrid transmission system is similar to that of gear switching in parallel drive mode. The difference is that in driving charging mode, the first motor 2 does not participate in driving but only generates electricity, which will not be elaborated here.

[0125] In some examples, the hybrid transmission system also features a parking charging mode. In parking charging mode, the first clutch 4 engages, and the engine 1 drives the first electric motor 2 to generate electricity.

[0126] The hybrid transmission system provided in this disclosure integrates five gear shafts, ten gears, and three clutches, enabling individual and hybrid drive functions for the engine and drive motor, as well as power generation by the generator. By combining parameters such as engine power, torque, and speed with those of the motor, and considering the limitations of the vehicle and the hybrid transmission itself, a three-gear design is achieved, maximizing space utilization to meet vehicle layout requirements within a limited space while achieving superior power performance. The multi-gear design also fully utilizes the engine's efficient operating point to achieve low fuel consumption.

[0127] This disclosure also provides a vehicle that includes the aforementioned hybrid power transmission system.

[0128] The above description is merely an optional embodiment of this disclosure and is not intended to limit this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the principles of this disclosure should be included within the protection scope of this disclosure.

Claims

1. A hybrid power transmission system, characterized in that, The hybrid transmission system includes an engine (1), a first motor (2), a second motor (3), a first clutch (4), a transmission mechanism (5), an output shaft (6), and a differential (7). The output shaft of the engine (1) is coaxial with the output shaft of the first motor (2) and is connected by transmission through the first clutch (4), wherein the first motor (2) is wrapped around the first clutch (4). 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) meshes with the output gear (302). The transmission mechanism (5) includes a second clutch (51), a drive shaft (52), a first gear train (53), a second gear train (54), a shifting mechanism (55), and a third gear train (56). The first gear train (53) includes a meshing first gear (531) and a second gear (532). The second gear train (54) includes a meshing third gear (541) and a fourth gear (542). The third gear train (56) includes a meshing fifth gear (561) and a sixth gear (562). 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). The second clutch (51) is a dual clutch. The diameter of the second clutch (51) is smaller than that of the first clutch (4). The second clutch (51) includes a first sub-clutch mechanism (511), a second sub-clutch mechanism (512), and a first housing (513). The first housing (513) is connected to the output shaft of the first motor (2). The first sub-clutch mechanism (511) includes a first clutch plate (5111) and a first pressure plate (5112). The first clutch plate (5111) is fixed circumferentially to the inner side of the first housing (513). The first pressure plate (5112) is connected to the drive shaft (52). When the first pressure plate (5112) is engaged with the first clutch plate (5111), the first motor (2) is connected to the drive shaft (52). The second sub-clutch mechanism (512) includes a second clutch plate (5121) and a second pressure plate (5122). The second clutch plate (5121) is fixed circumferentially to the inner side of the first housing (513). The second pressure plate (5122) is connected to the fifth gear (561), and both the second pressure plate (5122) and the fifth gear (561) are ringed around the transmission shaft (52). When the second clutch plate (5121) and the second pressure plate (5122) are engaged, the first motor (2) is connected to the fifth gear (561) in a transmission connection. The first gear (531) and the third gear (541) are connected to the drive shaft (52). The first gear (531) is also connected to the idler wheel (303). The second gear (532) and the fourth gear (542) are looped around the output shaft (6) and can be connected to the output shaft (6) through the shifting mechanism (55). The fifth gear (561) is looped around the drive shaft (52). The sixth gear (562) is connected to the output shaft (6). The input shaft of the differential (7) is connected to the output shaft (6) in a driving connection, and the output shaft of the differential (7) is connected to the wheel (100) in a driving connection. Let the axis of the motor body (301) be A, the axis of the idler wheel (303) be B, the axis of the transmission shaft (52) be C, the axis of the output shaft (6) be D, and the axis of the output shaft of the differential (7) be E. Among them, the axes A, B, C, D and E are parallel. The arrangement order of the axes from high to low is: axis A, axis B, axis C, axis E, axis D. The arrangement order of the axes from left to right is: axis C, axis B, axis A, axis D, axis E. ∠ABC is 164.82°±0.5°, ∠BCD is 130°±0.5°, ∠CDE is 117.25°±0.5°, the center distance L between the drive shaft (52) and the output shaft of the differential (7) is 197mm, and the height difference D between the drive shaft (52) and the output shaft of the differential (7) is 65mm; The hybrid power transmission system is located in the gearbox, and the height difference H between the lowest design line of the gearbox and the ground line is 226mm-236mm. The hybrid transmission system has a pure electric drive mode, an engine drive mode, a series drive mode, and a parallel drive mode. 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; or, the first motor (2) and the second motor (3) jointly drive the output shaft (6) to rotate. In the engine drive mode, the first clutch (4) is engaged, the first pressure plate (5112) is engaged with the first clutch disc (5111), and / or, the second clutch disc (5121) and the second pressure plate (5122) are engaged; In the series drive mode, the first clutch (4) is engaged, the engine (1) drives the first motor (2) to generate electricity, the first motor (2) supplies power to the second motor (3), and the second motor (3) drives the output shaft (6). In the parallel drive mode, the first clutch (4) is engaged, the first pressure plate (5112) is engaged with the first clutch disc (5111), and / or the second clutch disc (5121) and the second pressure plate (5122) are engaged, and the engine (1), the first motor (2) and the second motor (3) jointly drive the output shaft (6).

2. A vehicle, characterized in that, The vehicle includes the hybrid transmission system as described in claim 1.

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