Hybrid transmission system and vehicle

Abstract

This disclosure provides a hybrid transmission system and a vehicle, and belongs to the technical field of vehicle components. 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 power-driven by the first clutch (4). The output shafts of the first motor (2) and the second motor (3) are both power-driven by the transmission mechanism (5), which is used to power-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 power-drive a wheel (100). In this way, there is no need to implement a transmission connection by placing a pair of gears between the engine (1) and the first motor (2), thus reducing the volume of the hybrid transmission system.

Description

Technical Field

[0001] This disclosure relates to the technical field of vehicle parts, and particularly to a hybrid transmission system and a vehicle.

Background Art

[0002] A hybrid transmission system is an important component in a hybrid vehicle, and adopts an engine and a motor as power sources. The vehicle can realize a driving mode by oil and electricity, thereby having both power performance and economy.

Summary of the Invention

[0003] This disclosure provides a hybrid transmission system, and the technical solution of the hybrid transmission system is as follows.

[0004] In a first aspect, this disclosure provides a hybrid transmission system, which 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 transmission-connected by the first clutch. The output shafts of the first motor and the second motor are both connected to the output shaft by the transmission mechanism. Among them, the transmission mechanism is used to transmission-connect the output shaft with the engine, the first motor, and the second motor. at least one of and is used for transmission connection. The output shaft is used for transmission connection to the vehicle wheels.

[0005] In a possible embodiment, the first motor is externally fitted to the first clutch.

[0006] In a possible embodiment, the transmission mechanism includes a second clutch, a transmission shaft, a first gear train, a second gear train, a shift mechanism, and a third gear train. The second clutch is a dual clutch and includes a first sub-clutch mechanism and a second sub-clutch mechanism. The output shaft of the first motor is transmitted to the transmission shaft by the first sub-clutch mechanism, and the transmission shaft is transmitted to the input ends of the first gear train and the second gear train. The second motor described above is power-driven to the input terminals of the first gear train and the second gear train. The output ends of the first gear train and the second gear train are connected to the output shaft by the shift mechanism, and the shift mechanism can adjust the transmission connection between the first gear train and the output shaft. The input terminal of the third gear train is transmitted to the first motor by the second sub-clutch mechanism, and the input terminal of the third gear train is connected to the transmission shaft by the first sub-clutch mechanism and the second sub-clutch mechanism.

[0007] In one possible embodiment, the transmission ratio of the first gear train is greater than the transmission ratio of the third gear train, and the transmission ratio of the third gear train is greater than the transmission ratio of the second gear train.

[0008] In one possible embodiment, the hybrid transmission system has a purely electric drive mode and an engine drive mode, In the above pure electric drive mode, the first clutch does not engage, the second motor drives and rotates the output shaft, or both the first motor and the second motor drive and rotate the output shaft. In the above engine drive mode, the first clutch engages with the first sub-clutch mechanism and the second sub-clutch mechanism. at least one of the They fit together.

[0009] In one possible embodiment, the hybrid transmission system has a series drive mode and a parallel drive mode, In the above series drive mode, the first clutch engages, 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. In the above parallel drive mode, the first clutch engages with the first sub-clutch mechanism and the second sub-clutch mechanism. at least one of the In this configuration, the engine, the first motor, and the second motor all drive the output shaft.

[0010] In one possible embodiment, 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. The first gear and the third gear are connected to the transmission shaft, the first gear is further connected to the second motor, and the second gear and the fourth gear are fitted onto the output shaft. The third gear train includes a fifth gear and a sixth gear, the fifth gear being fitted onto the transmission shaft and connected to the second sub-clutch mechanism, and the sixth gear being connected to the output shaft.

[0011] In one possible embodiment, the second clutch further includes a first housing, the first housing being connected to the output shaft of the first motor, The first sub-clutch mechanism includes a first clutch plate and a first pressure plate, wherein the first clutch plate is fixed circumferentially inside the first housing, and the first pressure plate is connected to the transmission shaft, and when the first pressure plate engages with the first clutch plate, the first motor is connected to the transmission shaft. The second sub-clutch mechanism includes a second clutch plate and a second pressure plate, the second clutch plate being fixed circumferentially inside the first housing, and the second pressure plate being connected to the third gear train and fitted onto the transmission shaft, and the first motor being transmitted to the third gear train when the second clutch plate engages with the second pressure plate.

[0012] In one possible embodiment, the second motor includes a motor body, an output gear and an idler, The output gear is connected to the motor body, and the idler meshes with the output gear and the input terminal of the first gear train.

[0013] In a second aspect, the Disclosure further provides a vehicle which includes a hybrid transmission system as described in any one of the first aspects. [Brief explanation of the drawing]

[0014] To further illustrate the technical concepts in the embodiments of this disclosure, the drawings used in the description of the embodiments are briefly introduced below. Clearly, the drawings in the following description represent only a few embodiments of this disclosure, and those skilled in the art can obtain further drawings based on these without any creative work. [Figure 1] This is a schematic diagram of the structure of the hybrid transmission system shown in the embodiments of this disclosure. [Figure 2] This is a schematic diagram of the structure of the hybrid transmission system shown in the embodiments of this disclosure. [Figure 3] This is a schematic diagram of the local structure of the hybrid transmission system shown in the embodiments of this disclosure. [Figure 4] This is a schematic diagram of the power transmission path of the hybrid transmission system shown in the embodiments of this disclosure. [Figure 5] This is a schematic diagram of the power transmission path of the hybrid transmission system shown in the embodiments of this disclosure. [Figure 6] This is a schematic diagram of the power transmission path of the hybrid transmission system shown in the embodiments of this disclosure. [Figure 7] This is a schematic diagram of the structure of the hybrid transmission system shown in the embodiments of this disclosure. [Figure 8] This is a schematic diagram of the power transmission path in single-motor mode of the hybrid transmission system shown in the embodiments of this disclosure. [Figure 9]It is a schematic diagram of the power transmission path in the single-motor mode of the hybrid transmission system shown in the embodiments of the present disclosure. [Figure 10] It is a schematic diagram of the power transmission path in the single-motor mode of the hybrid transmission system shown in the embodiments of the present disclosure. [Figure 11] It is a schematic diagram of the power transmission path in the dual-motor mode of the hybrid transmission system shown in the embodiments of the present disclosure. [Figure 12] It is a schematic diagram of the power transmission path in the dual-motor mode of the hybrid transmission system shown in the embodiments of the present disclosure. [Figure 13] It is a schematic diagram of the power transmission path in the dual-motor mode of the hybrid transmission system shown in the embodiments of the present disclosure. [Figure 14] It is a schematic diagram of the power transmission path in the dual-motor mode of the hybrid transmission system shown in the embodiments of the present disclosure. [Figure 15] It is a schematic diagram of the power transmission path in the dual-motor mode of the hybrid transmission system shown in the embodiments of the present disclosure. [Figure 16] It is a schematic diagram of the power transmission path in the engine drive mode of the hybrid transmission system shown in the embodiments of the present disclosure. [Figure 17] It is a schematic diagram of the power transmission path in the engine drive mode of the hybrid transmission system shown in the embodiments of the present disclosure. [Figure 18] It is a schematic diagram of the power transmission path in the engine drive mode of the hybrid transmission system shown in the embodiments of the present disclosure. [Figure 19] It is a schematic diagram of the power transmission path in the parallel drive mode of the hybrid transmission system shown in the embodiments of the present disclosure. [Figure 20] It is a schematic diagram of the power transmission path in the parallel drive mode of the hybrid transmission system shown in the embodiments of the present disclosure. [Figure 21] It is a schematic diagram of the power transmission path in the parallel drive mode of the hybrid transmission system shown in the embodiments of the present disclosure. [Figure 22]This is a schematic diagram of the power transmission path in parallel drive mode of the hybrid transmission system shown in the embodiments of this disclosure. [Figure 23] This is a schematic diagram of the power transmission path in parallel drive mode of the hybrid transmission system shown in the embodiments of this disclosure. [Modes for carrying out the invention]

[0015] Unless otherwise defined, technical or scientific terms used herein have their ordinary meanings as understood by those skilled in the art to which this disclosure pertains. The terms “first,” “second,” “third,” and similar words used in the patent disclosure and claims of this disclosure are not intended to indicate order, quantity, or importance, but are used simply to distinguish different components. Similarly, similar phrases such as “one” or “one” are not intended to indicate a limit on quantity, but simply to indicate the presence of at least one. Similar phrases such as “include” or “contain” mean that the element or object appearing before “include” or “contain” includes the elements or objects and their equivalents listed after “include” or “contain,” and do not exclude other elements or objects. Similar phrases such as “connect” or “link” are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. “Up,” “down,” “left,” “right,” etc., are used simply to indicate relative positional relationships, and such relative positional relationships may change accordingly after the absolute position of the subject being described changes.

[0016] To further clarify the purpose, technical proposal, and advantages of this disclosure, embodiments of this disclosure will be described in more detail below, in conjunction with the attached drawings.

[0017] The embodiments of this disclosure are described in detail below, and examples of these embodiments are shown in the drawings, where the same or similar reference numerals throughout the text indicate the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the drawings are illustrative and are intended to be used to interpret this disclosure and should not be understood as limiting this disclosure.

[0018] A hybrid transmission system is a crucial component in hybrid vehicles, employing both an engine and an electric motor as power sources. The vehicle can utilize both oil and electric drive systems, thereby combining power and fuel efficiency. In related technologies, a hybrid transmission system includes an engine, a first motor, and a second motor. The engine and the first motor are connected by a pair of gears, allowing the engine to drive the first motor and generate electricity. However, hybrid transmission systems in related technologies are relatively complex in structure and occupy a relatively large volume, making their placement in vehicles relatively difficult.

[0019] Embodiments of the present disclosure provide a hybrid transmission system, as shown in Figures 1 and 2, comprising 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 transmitted by the first clutch 4. The output shafts of the first motor 2 and the second motor 3 are both connected to the output shaft 6 by the transmission mechanism 5. The transmission mechanism 5 is used to transmit power between the output shaft 6 and the engine 1 and / or the first motor 2 and / or the second motor 3. The output shaft 6 is used to transmit power to the wheel 100.

[0020] Of these, engine 1, the first motor 2, and the second motor 3 are power sources for the hybrid transmission system, and the transmission mechanism 5 is used to switch the power source of the output shaft 6.

[0021] In the inventions provided by the embodiments of this disclosure, the engine 1 and the first motor 2 are arranged coaxially and are 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. In this way, it is not necessary to arrange a pair of gears between the engine 1 and the first motor 2 to achieve the power transmission, and one gear shaft is reduced. This reduces the height dimension of the hybrid transmission system, thereby reducing the volume occupied by the hybrid transmission system, which helps to place the hybrid transmission system inside a vehicle.

[0022] In some examples, the first motor 2 is fitted onto the first clutch 4.

[0023] The following describes an exemplary embodiment of the transmission mechanism 5.

[0024] In some examples, as shown in Figure 2, the transmission mechanism 5 includes a second clutch 51, a transmission shaft 52, a first gear train 53, a second gear train 54, a shift mechanism 55, and a third gear train 56. As shown in Figure 3, the second clutch 51 is a dual clutch and includes a first sub-clutch mechanism 511 and a second sub-clutch mechanism 512. As shown in Figure 4, the output shaft of the first motor 2 is transmitted to the transmission shaft 52 by the first sub-clutch mechanism 511, and the transmission shaft 52 is transmitted to the input ends of the first gear train 53 and the second gear train 54. As shown in Figure 2, the second motor 3 is transmitted 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 by a shift mechanism 55, and the shift mechanism 55 can adjust the transmission connection between the first gear train 53, the second gear train 54 and the output shaft 6. As shown in Figure 5, the input end of the third gear train 56 is transmitted to the first motor 2 by a second sub-clutch mechanism 512. As shown in Figure 6, the input end of the third gear train 56 is connected to the transmission shaft 52 by a first sub-clutch mechanism 511 and a second sub-clutch mechanism 512.

[0025] Exemplary, as shown in Figure 2, the first gear train 53 includes a meshing first gear 531 and a second gear 532, and the second gear train 54 includes a meshing third gear 541 and a fourth gear 542. The first gear 531 and the third gear 541 are connected to the transmission shaft 52, the first gear 531 is further transmitted to the second motor 3, and the second gear 532 and the fourth gear 542 are fitted onto the output shaft 6. The third gear train 56 includes a fifth gear 561 and a sixth gear 562. The fifth gear 561 is fitted onto the transmission shaft 52 and connected to the second sub-clutch mechanism 512, and the sixth gear 562 is connected to the output shaft 6. The fifth gear 561 and the second sub-clutch mechanism 512 may be connected by a hollow shaft. The hollow shaft is fitted onto the transmission shaft 52, with one end of the hollow shaft connected to the fifth gear 561 and the other end connected to the second sub-clutch mechanism 512.

[0026] The shift mechanism 55 is located between the second gear 532 and the fourth gear 542, and the shift mechanism 55 is in sliding contact with the output shaft 6. When the shift mechanism 55 slides to the second gear 532 and connects to 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 the fourth gear 542 and connects to 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. Of these, the side wall of the shift mechanism 55 may have a projection, and the side walls of the second gear 532 and the fourth gear 542 may have a groove, and the projection on the shift mechanism 55 may extend into the groove of the second gear 532 and the fourth gear 542, thereby allowing the shift mechanism 55 to mesh with the second gear 532 or the fourth gear 542.

[0027] In some cases, 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. This allows the transmission mechanism 5 to switch to different shift positions. When the transmission mechanism 5 drives the output shaft 6 with the first gear train 53, the transmission mechanism 5 is in the first shift position. When the transmission mechanism 5 drives the output shaft 6 with the second gear train 54, the transmission mechanism 5 is in the second shift position. When the transmission mechanism 5 drives the output shaft 6 with the third gear train 56, the transmission mechanism 5 is in the third shift position.

[0028] In some examples, as shown in Figures 1 and 2, the second motor 3 includes a motor body 301, an output gear 302, and an idler 303. The output gear 302 is connected to the motor body 301, and the idler 303 meshes with the output gear 302 and the input terminals of the first gear train 53. The idler 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 303 does not change the transmission ratio between the output gear 302 and the first gear 531. After the idler 303 is installed, the rotation direction of the first gear 531 and the rotation direction of the output gear 302 can be made the same.

[0029] The following describes an example of a clutch embodiment.

[0030] In some examples, as shown in Figure 3, the second clutch 51 further includes 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 being fixed circumferentially inside the first housing 513, and the first pressure plate 5112 being connected to the transmission shaft 52. When the first pressure plate 5112 engages with the first clutch plate 5111, the first motor 2 is connected to the transmission shaft 52.

[0031] The second sub-clutch mechanism 512 includes a second clutch plate 5121 and a second pressure plate 5122, the second clutch plate 5121 being fixed circumferentially inside the first housing 513. The second pressure plate 5122 is connected to the third gear train 56 and the drive shaft 52 is fitted onto it. When the second clutch plate 5121 engages with the second pressure plate 5122, the first motor 2 is driven to the third gear train 56.

[0032] When the first pressure plate 5112 engages with the first clutch plate 5111 and the second clutch plate 5121 engages with the second pressure plate 5122, the second motor 3 drives the first pressure plate 5112 by the first gear 531 and the transmission shaft 52. The first pressure plate 5112 drives the first housing 513 to rotate by the first clutch plate 5111, and the first housing 513 drives the fifth gear 561 to rotate by the second clutch plate 5121 and the second pressure plate 5122, thereby realizing a power transmission connection between the second motor 3 and the second gear train 54.

[0033] The first sub-clutch mechanism 511 and the second sub-clutch mechanism 512 are combined into a single dual clutch, which makes the structure of the first sub-clutch mechanism 511 and the second sub-clutch mechanism 512 more compact, resulting in a relatively small volume, which is advantageous in reducing the axial dimension of the hybrid transmission system and further reducing the volume of the hybrid transmission system.

[0034] In some examples, as shown in Figure 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 powered to the output shaft of the engine 1, and the third clutch plate 42 is fixed circumferentially inside the second housing 41. The first motor 2 is fitted onto the second housing 41 and powered to the second housing 41. When the first clutch 4 engages, the third clutch plate 42 engages with the third pressure plate 43, causing the engine 1 to rotate by driving the third clutch plate 42 through the third pressure plate 43, and further by driving the first motor 2 through the third clutch plate 42 and the second housing 41.

[0035] In some examples, as shown in Figures 1 and 7, the hybrid transmission system further includes a differential 7, the input shaft of the differential 7 being driven to an output shaft 6, and the output shaft of the differential 7 being driven to a wheel 100.

[0036] As shown in Figure 7, let A be the axis of the motor body 301 of the second motor 3, B be the axis of the idler 303, C be the axis of the transmission shaft 52, D be the axis of the output shaft 6, and E be the axis of the output shaft of the differential 7. In this case, ∠ABC, ∠BCD, and ∠CDE are all less than 180°, which makes the overall structure of the hybrid transmission system relatively compact.

[0037] 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 may be 197 mm, and the height difference D between the transmission shaft 52 and the output shaft of the differential 7 may be 65 mm.

[0038] The hybrid transmission system is located within the gearbox, and if H is the height difference between the lowest design line of the gearbox and the ground line, then H is 226mm to 236mm.

[0039] The following provides an illustrative explanation of the operating principle of the hybrid transmission system.

[0040] In some examples, the hybrid transmission system has both a purely electric drive mode and an engine drive mode. The embodiments of the purely electric drive mode and the engine drive mode are described below illustratively. In the figures, the thick black arrows indicate the power transmission path.

[0041] (1) Pure electric drive mode In pure electric drive mode, the first clutch 4 does not engage, and the second motor 3 drives and rotates the output shaft 6. Alternatively, both the first motor 2 and the second motor 3 drive and rotate the output shaft 6. Of these, the pure electric drive mode has a single motor mode and a dual motor mode.

[0042] (a) Single motor mode In single-motor mode, neither engine 1 nor the first motor 2 rotates; instead, the second motor 3 drives and rotates the output shaft 6. Single-motor mode has a first shift position, a second shift position, and a third shift position, and is applicable when the vehicle has sufficient electricity or when the vehicle is traveling at low speed on urban roads.

[0043] In the first shift position of the single-motor mode, as shown in Figure 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 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 shift mechanism 55.

[0044] In the second shift position of the single-motor mode, as shown in Figure 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 engages with the fourth gear 542 of the second gear train 54, and the power of the second motor 3 is transmitted sequentially to the output shaft 6 through the second gear train 54 and the shift mechanism 55.

[0045] In the third shift position of the single-motor mode, as shown in Figure 10, the first clutch 4 is not engaged, the first sub-clutch mechanism 511 and the second sub-clutch mechanism 512 are both engaged, and 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 gear train 56 in that order.

[0046] (b) Dual motor mode In dual-motor mode, engine 1 does not rotate, and both the first motor 2 and the second motor 3 drive the output shaft 6 to rotate. The first motor 2 and the second motor 3 can drive the output shaft 6 by the same gear train; for example, both the first motor 2 and the second motor 3 drive the first gear train 53. The first motor 2 and the second motor 3 can also drive the output shaft 6 by different gear trains; for example, the first motor 2 drives the output shaft 6 by the third gear train 56, while the second motor 3 drives the output shaft 6 by the first gear train 53. This enables a function that does not interrupt power during gear changes. Dual motor mode This applies when the vehicle has sufficient electricity or when the vehicle is traveling at high speed on a city road.

[0047] In dual-motor mode, the hybrid transmission system has a first dual-motor shift position, a second dual-motor shift position, a third dual-motor shift position, a fourth dual-motor shift position, and a fifth dual-motor shift position.

[0048] In the first dual-motor shift position, as shown in Figure 11, the shift mechanism 55 engages with the second gear 532 of 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.

[0049] In the second dual-motor shift position, as shown in Figure 12, the second motor 3 drives the first gear train 53 by engaging the shift mechanism 55 with the second gear 532 of the first gear train 53. Simultaneously, the first motor 2 drives the third gear train 56 by engaging the second sub-clutch mechanism 512.

[0050] In the third dual-motor shift position, as shown in Figure 13, the shift mechanism 55 engages with the fourth gear 542 of the second gear train 54, and the first sub-clutch mechanism 511 also engages, so that both the first motor 2 and the second motor 3 drive the second gear train 54.

[0051] In the fourth dual-motor shift position, as shown in Figure 14, the shift mechanism 55 meshes with the fourth gear 542 of 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 meshes, and the first motor 2 drives the third gear train 56.

[0052] In the fifth dual-motor shift position, as shown in Figure 15, 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. At this time, the shift mechanism 55 is not engaged with either the second gear 532 or the fourth gear 542.

[0053] (2) Engine drive mode In engine-driven mode, the first clutch 4 engages, and the first sub-clutch mechanism 511 and / or the second sub-clutch mechanism 512 engage. The engine-driven mode has a first shift position, a second shift position and a third shift position.

[0054] In the first shift position of the engine drive mode, as shown in Figure 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, causing the first gear train 53 to drive and rotate the output shaft 6.

[0055] In the second shift position of the engine drive mode, as shown in Figure 17, both the first clutch 4 and the first sub-clutch mechanism 511 engage, and 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 engages with the fourth gear 542, causing the second gear train 54 to drive and rotate the output shaft 6.

[0056] In the third shift position of the engine drive mode, as shown in Figure 18, both the first clutch 4 and the second sub-clutch mechanism 512 are 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. At this time, the shift mechanism 55 is not engaged with either the second gear 532 or the fourth gear 542.

[0057] In engine-driven mode, the first motor 2 rotates but only serves to transmit power; that is, the first motor 2 is not energized, and in this case, the first motor 2 can be considered as a transmission shaft.

[0058] In some examples, the hybrid transmission system has both a series drive mode and a parallel drive mode. Examples of the series drive mode and the parallel drive mode are described below.

[0059] (1) Series drive mode In series drive mode, the first clutch 4 engages, 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 drive mode may also be called range extender mode, in which case the engine 1 does not directly drive the output shaft 6, but is used only to drive the first motor 2 to generate electricity. Therefore, in series drive mode, only switching between the first and second shift positions can be achieved. To achieve the second shift position, the first sub-clutch mechanism 511 and the second sub-clutch mechanism 512 must engage simultaneously, thereby allowing the engine 1 to transmit power to the third gear train 56. The principle of switching between the first and second shift positions in series drive mode is similar to that of switching between the first and second shift positions in single-motor mode, and therefore its explanation is omitted here.

[0060] (2) Parallel drive mode In parallel drive mode, the first clutch 4 engages, the first sub-clutch mechanism 511 and / or the second sub-clutch mechanism 512 engage, and the engine 1, the first motor 2 and the second motor 3 together drive the transmission mechanism 5. The parallel drive mode has a first parallel shift position, a second parallel shift position, a third parallel shift position, a fourth parallel shift position and a fifth parallel shift position.

[0061] In the first parallel shift position, as shown in Figure 19, the first clutch 4 and the first sub-clutch mechanism 511 are both engaged, and the shift mechanism 55 engages with the second gear 532 of the first gear train 53. As a result, the engine 1, the first motor 2, and the second motor 3 all drive the output shaft 6 by the first gear train 53.

[0062] In the second parallel shift position, as shown in Figure 20, both the first clutch 4 and the second sub-clutch mechanism 512 engage, and the shift mechanism 55 engages with the second gear 532 of the first gear train 53. As a result, the engine 1 and the first motor 2 are driven by the third gear train 56. Output axis The second motor 3 drives the output shaft 6 via the first gear train 53.

[0063] In the third parallel shift position, as shown in Figure 21, the first clutch 4 and the first sub-clutch mechanism 511 are both engaged, and the shift mechanism 55 engages with the fourth gear 542 of the second gear train 54. As a result, the engine 1, the first motor 2, and the second motor 3 all drive the output shaft 6 by the second gear train 54.

[0064] In the fourth parallel shift position, as shown in Figure 22, both the first clutch 4 and the second sub-clutch mechanism 512 engage, and the shift mechanism 55 engages with the fourth gear 542 of the second gear train 54. As a result, the engine 1 and the first motor 2 are driven by the third gear train 56. Output axis The second motor 3 drives the output shaft 6 via the second gear train 54.

[0065] In the fifth parallel shift position, as shown in Figure 23, the first clutch 4, the first sub-clutch mechanism 511, and the second sub-clutch mechanism 512 are all engaged. As a result, the engine 1, the first motor 2, and the second motor 3 all drive the output shaft 6 by 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.

[0066] In some cases, the hybrid transmission system further includes a driving-charging mode. In the driving-charging mode, the first clutch 4 engages, and the engine 1 drives the first motor 2 to generate electricity. In the driving-charging mode, the hybrid transmission system also has an engine-driven mode, and the principle of the engine-driven mode in the driving-charging mode is similar to that of the engine-driven mode described above, so its explanation is omitted here.

[0067] In the driving-and-charging mode, the second motor 3 can also participate in driving the output shaft 6. At this time, the principle of shift position switching of the hybrid transmission system is similar to the principle of shift position switching in the parallel drive mode, the difference being that in the driving-and-charging mode, the first motor 2 does not participate in driving but only generates electricity, and this explanation will be omitted here.

[0068] In some cases, the hybrid transmission system further includes a parking charge mode. In parking charge mode, the first clutch 4 engages, and the engine 1 drives the first motor 2 to generate electricity.

[0069] The hybrid transmission system provided by the embodiments of this disclosure integrates five gear shafts, ten gears, and three clutches, enabling both standalone and hybrid drive functions for the engine and drive motor, and further enabling the power generation function of the generator. By combining parameters such as engine power, torque, and rotational speed, as well as parameters such as motor power, torque, and rotational speed, and by combining the boundary constraints of the entire vehicle with the boundary constraints of the hybrid gearbox itself, a three-shift position design is realized, making full use of space and meeting the layout needs of the entire vehicle in a limited space while simultaneously achieving excellent dynamism. The multi-shift position design fully utilizes the high-efficiency operation of the engine to achieve low fuel consumption performance.

[0070] Embodiments of this disclosure further provide a vehicle which includes the above-mentioned hybrid transmission system.

[0071] The above description is merely an optional embodiment of the Disclosure and is not intended to limit the Disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the principles of the Disclosure should be included within the scope of the Disclosure. [Explanation of symbols]

[0072] 1. Engine, 2. First motor, 3. Second motor, 301. Motor body, 302. Output gear, 303. Idler, 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 gear train, 531. First gear, 532. Second gear, 54. Second gear train, 541. Third gear, 542. Fourth gear, 55. Shift mechanism, 56. Third gear train, 561. Fifth gear, 562. Sixth gear, 6. Output shaft, 7, differential gear, 100, wheels.

Claims

1. It is a hybrid transmission system, The aforementioned 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 power-driven by the first clutch (4). The output shaft of the first motor (2) and the output shaft of the second motor (3) are both connected to the output shaft (6) by the transmission mechanism (5), the transmission mechanism (5) is used to transmit power between the output shaft (6) and the engine (1) and / or the first motor (2) and / or the second motor (3). The output shaft (6) is characterized in that it is used to transmit power to the wheel (100). Hybrid transmission system.

2. The first motor (2) is characterized by being fitted onto the first clutch (4), The hybrid transmission system according to claim 1.

3. The transmission mechanism (5) includes a second clutch (51), a transmission shaft (52), a first gear train (53), a second gear train (54), a shift mechanism (55), and a third gear train (56), wherein the second clutch (51) is a dual clutch and includes a first sub-clutch mechanism (511) and a second sub-clutch mechanism (512), The output shaft of the first motor (2) is transmitted to the transmission shaft (52) by the first sub-clutch mechanism (511), and the transmission shaft (52) is transmitted to the input ends of the first gear train (53) and the second gear train (54). The second motor (3) is power-driven to the input terminals 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) by the shift mechanism (55), and the shift mechanism (55) can adjust the transmission connection between the first gear train (53) and the output shaft (6). The input end of the third gear train (56) is transmitted to the first motor (2) by the second sub-clutch mechanism (512), and the input end of the third gear train (56) is transmitted to the transmission shaft (52) by the first sub-clutch mechanism (511) and the second sub-clutch mechanism (512), characterized in that The hybrid transmission system according to claim 1.

4. 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 hybrid transmission system according to claim 3.

5. The aforementioned hybrid transmission system has a pure electric drive mode and an engine drive mode, In the purely electric drive mode, the first clutch (4) does not engage, and the second motor (3) drives and rotates the output shaft (6), or both the first motor (2) and the second motor (3) drive and rotate the output shaft (6). In the engine drive mode, the first clutch (4) engages, and the first sub-clutch mechanism (511) and / or the second sub-clutch mechanism (512) engage. The hybrid transmission system according to claim 3.

6. The aforementioned hybrid transmission system has a serial drive mode and a parallel drive mode, In the series drive mode, the first clutch (4) engages, 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 drive mode, the first clutch (4) engages, the first sub-clutch mechanism (511) and / or the second sub-clutch mechanism (512) engage, and the engine (1), the first motor (2), and the second motor (3) all drive the output shaft (6). The hybrid transmission system according to claim 3.

7. The first gear train (53) includes a meshing first gear (531) and a second gear (532), and the second gear train (54) includes a meshing third gear (541) and a fourth gear (542). The first gear (531) and the third gear (541) are connected to the transmission shaft (52), the first gear (531) is further transmitted to the second motor (3), and the second gear (532) and the fourth gear (542) are fitted onto the output shaft (6). The third gear train (56) includes a fifth gear (561) and a sixth gear (562), wherein the fifth gear (561) is fitted onto the transmission shaft (52) and connected to the second sub-clutch mechanism (512), and the sixth gear (562) is connected to the output shaft (6). A hybrid transmission system according to any one of claims 3 to 6.

8. The second clutch (51) further includes 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), wherein the first clutch plate (5111) is fixed circumferentially inside the first housing (513), and the first pressure plate (5112) is connected to the transmission shaft (52), and when the first pressure plate (5112) engages with the first clutch plate (5111), the first motor (2) is connected to the transmission shaft (52). The second sub-clutch mechanism (512) includes a second clutch plate (5121) and a second pressure plate (5122), wherein the second clutch plate (5121) is fixed circumferentially inside the first housing (513), and the second pressure plate (5122) is connected to the third gear train (56) and fitted onto the transmission shaft (52), and when the second clutch plate (5121) engages with the second pressure plate (5122), the first motor (2) is transmitted to the third gear train (56). A hybrid transmission system according to any one of claims 3 to 6.

9. The second motor (3) includes a motor body (301), an output gear (302), and an idler (303). The output gear (302) is connected to the motor body (301), and the idler (303) meshes with the output gear (302) and the input terminal of the first gear train (53). A hybrid transmission system according to any one of claims 1 to 6.

10. A hybrid transmission system characterized by including the one described in any one of claims 1 to 9, vehicle.

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