Six drive powertrain and vehicle

Abstract

This application relates to a six-wheel drive system and vehicle, belonging to the technical field of vehicle powertrain systems. The six-wheel drive system includes a front drive shaft, a middle drive shaft, a rear drive shaft, a front motor, a first transmission assembly, a rear motor, and a second transmission assembly. The first transmission assembly is used to engage or disengage the front motor from the middle drive shaft and the front motor from the front drive shaft. The front motor is connected to the middle drive shaft via the first transmission assembly, and the second transmission assembly is used to engage or disengage the rear motor from the rear drive shaft. The front and rear motors operate independently, and the second transmission assembly operates independently of the first transmission assembly. The six-wheel drive system and vehicle provided by this application, by setting up a front motor and a rear motor, enable the front motor to drive the front and middle wheels to rotate, and the rear motor to drive the rear wheels to rotate, achieving six-wheel drive using two power sources. This not only results in low fuel consumption but also strong and smooth power output.

Description

Technical Field

[0001] This application relates to the technical field of vehicle powertrain systems, and more particularly to a six-drive system and vehicle. Background Technology

[0002] Some models adopt a six-by-six (6×6) drive configuration, which provides driving force to all six wheels simultaneously, significantly improving the vehicle's ability to pass through and its off-road performance in extreme road conditions such as mud, sand, and steep slopes. When facing soft terrain or complex unpaved roads, the 6×6 drive system can achieve balanced power distribution, effectively preventing wheel slippage and ensuring that the vehicle has excellent traction.

[0003] However, most existing 6x6 vehicles use traditional internal combustion engine systems, which rely solely on the engine as a power source. On the one hand, under conditions of frequent start-stop, low-speed hill climbing, and complex off-road driving, the engine needs to maintain high load for extended periods, leading to a significant increase in fuel consumption and limited range. On the other hand, the mechanical transmission structure of traditional internal combustion engine systems is complex, requiring power to be transmitted to each drive wheel through multiple stages such as clutches, transmissions, and transfer cases. Significant energy loss occurs during transmission, resulting in low overall system efficiency. Utility Model Content

[0004] This application addresses, to at least some extent, one of the technical problems in the related art.

[0005] Therefore, this application aims to provide a six-wheel drive system and vehicle, which uses two motors, one of which drives the front and middle wheels to rotate, and the other motor drives the rear wheels to rotate, thereby achieving six-wheel drive by using two power sources. This not only results in low fuel consumption but also strong and smooth power output.

[0006] To achieve the above objectives, in a first aspect, this application provides a six-drive system, comprising:

[0007] Front drive shaft;

[0008] Middle drive shaft;

[0009] Rear drive shaft;

[0010] Front motor;

[0011] The first transmission assembly is used to engage or disconnect the front motor from the middle drive shaft, and to engage or disconnect the front motor from the front drive shaft.

[0012] Rear motor;

[0013] The second transmission assembly is used to engage or disengage the rear motor from the rear drive shaft;

[0014] The front motor and the rear motor operate independently of each other, and the second transmission assembly and the first transmission assembly operate independently of each other.

[0015] In this technical solution, by setting up two power sources, a front motor and a rear motor, and enabling both power sources to work simultaneously, six-wheel drive can be achieved. This not only reduces fuel consumption but also provides strong and smooth power output. By setting the front motor and the rear motor independently, they can work selectively or simultaneously, allowing the power system to have multiple drive modes and be suitable for various working conditions. This increases the flexibility and applicability of the power system and better meets user needs.

[0016] In some embodiments of this application, the front drive shaft and the middle drive shaft are non-decoupled, while the front drive shaft and the rear drive shaft, and the middle drive shaft and the rear drive shaft are decoupled.

[0017] In this technical solution, the front drive shaft and the center drive shaft are designed to be non-decoupled, thereby achieving a uniform distribution of power between them and improving the stability of the power system at high speeds and on low-traction surfaces. Furthermore, by designing the front drive shaft to be decoupled from the rear drive shaft, the center drive shaft, and the rear drive shaft, the center drive shaft rotates synchronously when the front drive shaft rotates; the rear drive shaft may or may not rotate when the front drive shaft rotates; and the rear drive shaft may or may not rotate when the center drive shaft rotates. This allows the power system to have multiple driving modes, making it suitable for various operating conditions, increasing its flexibility and applicability, and better meeting user needs.

[0018] In some embodiments of this application, the six-drive system includes a pure electric two-drive mode. In the pure electric two-drive mode, the rear motor works, the front motor does not work, the first transmission component is disconnected, and the second transmission component is engaged.

[0019] The power output from the rear motor is transmitted to the rear drive shaft through the second transmission assembly.

[0020] In this technical solution, by making the rear motor work while the front motor does not work, the rear wheels are rotated to achieve two-wheel drive. This results in a shorter power transmission path, less energy loss, and also increases the range of the power system.

[0021] In some embodiments of this application, the six-drive system includes a pure electric four-wheel drive mode. In the pure electric four-wheel drive mode, the front motor works, the rear motor does not work, the first transmission component is engaged, and the second transmission component is disengaged.

[0022] Part of the power output from the front motor is transmitted to the front drive shaft through the first transmission assembly, and the other part is transmitted to the middle drive shaft through the first transmission assembly.

[0023] In this technical solution, by making the front motor work while the rear motor does not work, and by engaging the first transmission component, the front wheels and the middle wheel can be rotated, thus achieving four-wheel drive. This results in better vehicle grip and handling, and safer and more stable driving.

[0024] In some embodiments of this application, the six-drive system includes a pure electric six-drive mode, in which the rear motor and the front motor operate, and the first transmission component and the second transmission component engage.

[0025] Part of the power output from the front motor is transmitted to the front drive shaft through the first transmission assembly, and the other part is transmitted to the middle drive shaft through the first transmission assembly.

[0026] The power output from the rear motor is transmitted to the rear drive shaft through the second transmission assembly.

[0027] In the technical solution, by making the rear motor and the front motor work and engaging the first transmission component and the second transmission component, the front wheel, the middle wheel and the rear wheel rotate simultaneously to achieve six-wheel drive. This not only provides strong power output and acceleration, but also provides greater grip and traction, and has good passability in extremely complex terrains (such as deep mud, steep slopes, sand, etc.), thus improving the vehicle's handling and stability.

[0028] In some embodiments of this application, an engine and a clutch are also included. The engine is connected to a front motor via the clutch, the engine is connected to a front drive shaft via the clutch, the front motor and the first transmission assembly, and the engine is connected to a middle drive shaft via the clutch, the front motor and the first transmission assembly.

[0029] In the technical solution, by setting up an engine, the power system can simultaneously provide both fuel and electric power, increasing the driving modes of the power system, making it suitable for various working conditions, increasing the flexibility and applicability of the power system, and better meeting user needs.

[0030] In some embodiments of this application, the six-drive system includes a mechanical four-wheel drive mode, in which the engine is working, the rear motor and the front motor are not working, the engine is connected to the front motor via a clutch; the first transmission component is engaged, and the second transmission component is disengaged.

[0031] The engine outputs power, part of which is transmitted to the front drive shaft and the other part to the center drive shaft.

[0032] In the technical solution, by activating the engine, the clutch and the first transmission component are engaged, so that the engine drives the front wheels and the middle wheel to rotate, thereby achieving four-wheel drive. Compared with pure electric four-wheel drive, mechanical four-wheel drive outputs stronger power and can withstand greater torque output.

[0033] In some embodiments of this application, the six-drive system includes a hybrid four-wheel drive mode. In the hybrid four-wheel drive mode, the engine and the front motor work, the rear motor does not work, and the engine is connected to the front motor through a clutch; the first transmission component is engaged, and the second transmission component is disengaged.

[0034] The engine outputs power, part of which is transmitted to the front drive shaft and the other part to the center drive shaft;

[0035] Part of the power output from the front motor is transmitted to the front drive shaft through the first transmission assembly, and the other part is transmitted to the middle drive shaft through the first transmission assembly.

[0036] In the technical solution, four-wheel drive is achieved by making the engine and the front motor work to drive the front wheel and the middle wheel to rotate. Although the engine and the front motor simultaneously input power to the front drive shaft and the middle drive shaft, the non-decoupled connection between the front drive shaft and the middle drive shaft allows the power to be evenly distributed between the front drive shaft and the middle drive shaft, improving high-speed driving stability and low-traction road surface stability.

[0037] In some embodiments of this application, the six-drive system includes a hybrid six-drive mode. In the hybrid six-drive mode, the engine and the rear motor are both working, the front motor is working or not working, the engine is connected to the front motor through a clutch, and the first transmission component and the second transmission component are engaged.

[0038] A portion of the power output from the engine and / or the front motor is transmitted to the front drive shaft, and another portion is transmitted to the center drive shaft;

[0039] The power output from the rear motor is transmitted to the rear drive shaft through the second transmission assembly.

[0040] In this technical solution, by operating the engine, rear motor, and / or front motor to utilize both fuel and electricity simultaneously, not only can strong power be provided, but the driving range can also be extended.

[0041] Secondly, this application provides a vehicle including the aforementioned six-drive system.

[0042] In the technical solution, the vehicle is equipped with the aforementioned six-wheel drive system, which can not only select two-wheel drive, four-wheel drive, or six-wheel drive according to actual working conditions, but also select whether to use the engine, the electric motor, or both the engine and the electric motor to provide power. The vehicle has multiple driving modes, good power performance, smoother power output, and can also reduce fuel consumption.

[0043] As can be seen from the above technical solutions, additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0044] Figure 1 This is a schematic diagram of the structure of a six-drive force system according to an embodiment of this application;

[0045] Figure 2 This is a structural schematic diagram of the front drive shaft and rear drive shaft portion in a six-drive system according to an embodiment of this application;

[0046] Figure 3 This is a schematic diagram of the structure of the first transmission component in a six-drive system according to an embodiment of this application;

[0047] Figure 4 This is a schematic diagram of the structure of the second transmission component in a six-drive system according to an embodiment of this application.

[0048] In the above diagrams: 1. Front drive shaft; 2. Middle drive shaft; 3. Rear drive shaft; 4. Engine; 5. Clutch; 6. Front motor; 7. First transmission assembly; 8. Rear motor; 9. Second transmission assembly;

[0049] 11. Connecting shaft; 12. First transmission gear;

[0050] 21. Power transmission shaft; 22. Third transmission gear; 23. Fourth transmission gear;

[0051] 31. Fifth transmission gear;

[0052] 61. Second transmission gear;

[0053] 71. First gear set; 72. Second gear set; 73. Third gear set;

[0054] 711. First gear; 712. Second gear; 721. Third gear; 722. Fourth gear; 731. Fifth gear; 732. Sixth gear;

[0055] 81. The sixth transmission gear;

[0056] 91. Seventh gear; 92. Fourth gear set; 93. Fifth gear set;

[0057] 921. The eighth gear; 922. The ninth gear;

[0058] 931. The tenth gear; 932. The eleventh gear. Detailed Implementation

[0059] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0060] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between the components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal engagement of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0061] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0062] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0063] The present application will now be described in detail through exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may be advantageously incorporated into other embodiments.

[0064] It should be noted that in the automotive field, in practical applications, as long as the vehicle is in motion, the wheels will usually rotate regardless of the mode. In this embodiment, wheel rotation refers to the wheels actively rotating under the drive of the directly connected drive shaft, rather than being driven by the shaft. Please note the difference here.

[0065] In the current technology, most 6×6 vehicles use traditional fuel power systems, which rely solely on the engine as a single power source, resulting in high fuel consumption and low transmission efficiency.

[0066] Based on this, this application proposes a six-wheel drive system and vehicle, which uses two motors, one of which drives the front and middle wheels to rotate, and the other motor drives the rear wheels to rotate, thereby achieving six-wheel drive by using two power sources. This not only results in low fuel consumption but also strong and smooth power output.

[0067] In the following, embodiments of this application will be described in detail with reference to the accompanying drawings.

[0068] As attached Figure 1 As shown in an illustrative embodiment of the six-drive system and vehicle of this application, the six-drive system includes a front drive shaft 1, a middle drive shaft 2, a rear drive shaft 3, a front motor 6, a first transmission assembly 7, a rear motor 8, and a second transmission assembly 9. The front drive shaft 1 is used to drive the front wheels of the vehicle to rotate; the middle drive shaft 2 is used to drive the middle wheels of the vehicle to rotate; the rear drive shaft 3 is used to drive the rear wheels of the vehicle to rotate; the first transmission assembly 7 is used to engage or disengage the front motor 6 from the middle drive shaft 2, and to engage or disengage the front motor 6 from the front drive shaft 1; the front motor 6 is connected to the front drive shaft 1 and the middle drive shaft 2 through the first transmission assembly 7. When the first transmission assembly 7 is engaged... When the first transmission assembly 7 is engaged, the front motor 6 is connected to the front drive shaft 1 and simultaneously to the middle drive shaft 2; when the first transmission assembly 7 is disengaged, the front motor 6 is disconnected from the front drive shaft 1 and simultaneously to the middle drive shaft 2; the second transmission assembly 9 is used to engage or disengage the rear motor 8 from the rear drive shaft 3; the rear motor 8 is connected to the rear drive shaft 3 via the second transmission assembly 9; when the second transmission assembly 9 is engaged, the rear motor 8 is connected to the rear drive shaft 3; when the second transmission assembly 9 is disengaged, the rear motor 8 is disconnected from the rear drive shaft 3; the front motor 6 and the rear motor 8 operate independently of each other, and the second transmission assembly 9 and the first transmission assembly 7 operate independently of each other.

[0069] like Figure 2 and Figure 3As shown, when the first transmission assembly 7 is engaged, the front motor 6 is simultaneously connected to both the front drive shaft 1 and the middle drive shaft 2. When the first transmission assembly 7 is disengaged, the front motor 6 is simultaneously disconnected from both the front drive shaft 1 and the middle drive shaft 2. Therefore, the front drive shaft 1 and the middle drive shaft 2 are non-decoupled, and when the front drive shaft 1 rotates, the middle drive shaft 2 also rotates synchronously. When the first transmission assembly 7 is engaged, the second transmission assembly 9 may or may not be engaged. Therefore, the front drive shaft 1 is decoupled from the rear drive shaft 3, the middle drive shaft 2, and the rear drive shaft 3. When the front drive shaft 1 rotates, the rear drive shaft 3 may or may not rotate; similarly, when the middle drive shaft 2 rotates, the rear drive shaft 3 may or may not rotate.

[0070] In some embodiments, such as Figure 2 and Figure 3 As shown, the front drive shaft 1 is connected to a connecting shaft 11, and a first transmission gear 12 is provided on the connecting shaft 11. The first transmission gear 12 meshes with a third transmission gear 22 to achieve a non-coupled connection between the front drive shaft 1 and the middle drive shaft 2.

[0071] When the rear motor 8 is working and the front motor 6 is not working, the second transmission component 9 is engaged and the first transmission component 7 is disengaged. The rear motor 8 can drive the rear drive shaft 3 to rotate, causing the rear wheels to rotate actively, thereby achieving two-wheel drive.

[0072] When the current motor 6 is working and the rear motor 8 is not working, the first transmission component 7 is engaged and the second transmission component 9 is disengaged. The front motor 6 can drive the front drive shaft 1 and the middle drive shaft 2 to rotate, so that the front wheel and the middle wheel can rotate actively, thereby realizing four-wheel drive.

[0073] When the front motor 6 and the rear motor 8 work simultaneously, the first transmission component 7 and the second transmission component 9 engage. The front motor 6 can drive the front drive shaft 1 and the middle drive shaft 2 to rotate, causing the front wheel and the middle wheel to rotate actively. The rear motor 8 can drive the rear drive shaft 3 to rotate, causing the rear wheel to rotate actively, thereby achieving six-wheel drive.

[0074] like Figure 2 As shown, the output shaft of the front motor 6 is connected to a second transmission gear 61, which is connected to the first transmission assembly 7 so that the front motor 6 is connected to the first transmission assembly 7.

[0075] In some embodiments, such as Figure 3As shown, the first transmission assembly 7 includes a first gear set 71 and a second gear set 72, with the first gear set 71 meshing with the second transmission gear 61; the middle drive shaft 2 is connected to a force transmission shaft 21, which is connected to a third transmission gear 22, which meshes with the second gear set 72; when the first gear set 71 and the second gear set 72 are meshed, the front motor 6 is connected to the middle drive shaft 2; when the first gear set 71 and the second gear set 72 are separated, the front motor 6 is disconnected from the middle drive shaft 2.

[0076] Preferably, the first gear set 71 includes a first gear 711 and a second gear 712, which are coaxially arranged and rotate synchronously; the second gear set 72 includes a third gear 721 and a fourth gear 722, which are coaxially arranged and rotate synchronously; wherein, the first gear 711 meshes with the second transmission gear 61, the second gear 712 meshes with the third gear 721, and the fourth gear 722 meshes with the third transmission gear 22, so that the front motor 6 is connected to the middle drive shaft 2.

[0077] In some embodiments, such as Figure 3 As shown, the first transmission assembly 7 also includes a third gear set 73, which meshes with the first gear set 71. The force transmission shaft 21 is connected to a fourth transmission gear 23. When the third gear set 73 meshes with the fourth transmission gear 23, the front motor 6 is connected to the middle drive shaft 2. When the third gear set 73 and the fourth transmission gear 23 are separated, the front motor 6 is disconnected from the middle drive shaft 2.

[0078] Preferably, the third gear set 73 includes a fifth gear 731 and a sixth gear 732, the fifth gear 731 and the sixth gear 732 are coaxially arranged and rotate synchronously; the fifth gear 731 meshes with the second transmission gear 61, and the sixth gear 732 meshes with the fourth transmission gear 23, so that the front motor 6 is connected to the middle drive shaft 2.

[0079] It should be noted that, when the output speed of the front motor 6 is the same, the speed at which power is transmitted from the second transmission gear 61, the first gear set 71, the second gear set 72 and the third transmission gear 22 to the middle drive shaft 2 is V1; the speed at which power is transmitted from the second transmission gear 61, the first gear set 71, the third gear set 73 and the third transmission gear 22 to the middle drive shaft 2 is V2. V1 and V2 are different, and the transmission ratios of the two power transmission paths are different. The transmission path with the higher speed is the high-speed transmission, and the transmission path with the lower speed is the low-speed transmission.

[0080] By setting two power transmission paths between the front motor 6 and the middle drive shaft 2 to transmit the power output of the front motor 6, and the two paths transmit at different speeds, the middle drive shaft 2 can have different speed ranges.

[0081] It should be noted that, in some embodiments, the engagement of the first transmission component 7 means that the second gear 712 meshes with the third gear 721 or the sixth gear 732 meshes with the fourth transmission gear 23; the disengagement of the first transmission component 7 means that the second gear 712 separates from the third gear 721 or the sixth gear 732 separates from the fourth transmission gear 23.

[0082] like Figure 4 As shown, the rear drive shaft 3 is connected to a fifth transmission gear 31, which is connected to the second transmission assembly 9 so that the rear drive shaft 3 is connected to the second transmission assembly 9.

[0083] like Figure 4 As shown, the output shaft of the rear motor 8 is connected to a sixth transmission gear 81, which is connected to the second transmission assembly 9 so that the rear motor 8 is connected to the second transmission assembly 9.

[0084] In some embodiments, such as Figure 4 As shown, the second transmission assembly 9 includes a seventh gear 91, a fourth gear set 92, and a fifth gear set 93. The seventh gear 91 meshes with the fifth transmission gear 31; the fourth gear set 92 meshes with the fifth gear set 93, and the fifth gear set 93 meshes with the sixth transmission gear 81. When the seventh gear 91 meshes with the fourth gear set 92, the rear motor 8 is connected to the rear drive shaft 3; when the seventh gear 91 disengages from the fourth gear set 92, the rear motor 8 is disconnected from the rear drive shaft 3.

[0085] Preferably, the fourth gear set 92 includes an eighth gear 921 and a ninth gear 922, which are coaxially arranged and rotate synchronously; the fifth gear set 93 includes a tenth gear 931 and an eleventh gear 932, which are coaxially arranged and rotate synchronously; the eighth gear 921 meshes with the seventh gear 91, the ninth gear 922 meshes with the tenth gear 931, and the eleventh gear 932 meshes with the sixth transmission gear 81, so that the rear motor 8 is connected to the rear drive shaft 3.

[0086] It should be noted that in some embodiments, engagement of the second transmission component 9 means that the seventh gear 91 and the eighth gear 921 are engaged, and disengagement of the second transmission component 9 means that the seventh gear 91 and the eighth gear 921 are separated.

[0087] It should also be noted that in some embodiments, the second gear set 72, the third gear set 73, and the fourth gear set 92 are gear sets with engagement sleeves and synchronizers, so that the second gear 712 and the third gear 721, the sixth gear 732 and the fourth transmission gear 23, and the seventh gear 91 and the eighth gear 921 are meshed through engagement sleeves or synchronizers. This is a conventional technical means in the art and will not be described in detail here.

[0088] like Figure 1 As shown, the six-drive system also includes an engine 4 and a clutch 5. The engine 4 is connected to the front motor 6 through the clutch 5. When the clutch 5 is engaged, the engine 4 is connected to the front motor 6; when the clutch 5 is disengaged, the engine 4 is disconnected from the front motor 6.

[0089] It should be noted that since the front motor 6 is connected to the front drive shaft 1 through the first transmission assembly 7, when the engine 4 is connected to the front motor 6 through the clutch 5, the engine 4 is also connected to the front drive shaft 1 through the first transmission assembly 7. Similarly, since the front motor 6 is connected to the middle drive shaft 2 through the first transmission assembly 7, when the engine 4 is connected to the front motor 6 through the clutch 5, the engine 4 is also connected to the middle drive shaft 2 through the first transmission assembly 7.

[0090] That is, engine 4 is connected to front drive shaft 1 via clutch 5, front motor 6 and first transmission assembly 7; engine 4 is connected to middle drive shaft 2 via clutch 5, front motor 6 and first transmission assembly 7.

[0091] It should also be noted that when the clutch 5 is engaged but the first transmission assembly 7 is disengaged, the engine 4 can drive the front motor 6 to generate electricity.

[0092] The six-drive system includes at least the following modes: pure electric two-wheel drive, range-extended two-wheel drive, pure electric four-wheel drive, mechanical four-wheel drive, hybrid four-wheel drive, pure electric six-wheel drive, and hybrid six-wheel drive.

[0093] In pure electric two-wheel drive mode, the rear motor 8 is working, while the front motor 6 and engine 4 are not working. The first transmission assembly 7 is disconnected, and the second transmission assembly 9 is engaged. The power output from the rear motor 8 is transmitted to the rear drive shaft 3 through the second transmission assembly 9, causing the rear drive shaft 3 to drive the rear wheels to rotate, thus achieving two-wheel drive for the rear wheels.

[0094] In range-extended two-wheel drive mode, the rear motor 8 and engine 4 are working, while the front motor 6 is not working. The first transmission assembly 7 is disconnected, and the second transmission assembly 9 is engaged. The power output from the rear motor 8 is transmitted to the rear drive shaft 3 through the second transmission assembly 9, causing the rear drive shaft 3 to drive the rear wheels to rotate, thus achieving two-wheel drive for the rear wheels; the engine 4 drives the front motor 6 to generate electricity.

[0095] In pure electric four-wheel drive mode, the front motor 6 is working, while the rear motor 8 and engine 4 are not working. The first transmission component 7 is engaged, and the second transmission component 9 is disengaged. Part of the power output from the front motor 6 is transmitted to the front drive shaft 1 through the first transmission component 7, causing the front drive shaft 1 to drive the front wheels to rotate. The other part is transmitted to the middle drive shaft 2 through the first transmission component 7, causing the middle drive shaft 2 to drive the middle wheel to rotate, thus realizing four-wheel drive for the front and middle wheels.

[0096] In mechanical four-wheel drive mode, the rear motor 8 and the front motor 6 are not working, and the engine 4 is working. The engine 4 is connected to the front motor 6 through the clutch 5; the first transmission component 7 is engaged, and the second transmission component 9 is disengaged; part of the power output by the engine 4 is transmitted to the front drive shaft 1 through the clutch 5 and the first transmission component 7, causing the front drive shaft 1 to drive the front wheels to rotate, and the other part is transmitted to the middle drive shaft 2 through the first transmission component 7, causing the middle drive shaft 2 to drive the middle wheel to rotate, thus realizing four-wheel drive of the front wheels and the middle wheel.

[0097] It should be noted that in mechanical four-wheel drive mode, since clutch 5 is engaged and front motor 6 is not working, engine 4 can drive front motor 6 to generate electricity, and the vehicle can charge while driving.

[0098] In hybrid four-wheel drive mode, engine 4 and front motor 6 work, while rear motor 8 does not work. Engine 4 is connected to front motor 6 through clutch 5; first transmission assembly 7 is engaged, and second transmission assembly 9 is disengaged; part of the power output by engine 4 is transmitted to front drive shaft 1, and the other part is transmitted to middle drive shaft 2; part of the power output by front motor 6 is transmitted to front drive shaft 1 through first transmission assembly 7, and the other part is transmitted to middle drive shaft 2 through first transmission assembly 7, thus realizing four-wheel drive of the front and middle wheels.

[0099] It should be noted that although the engine 4 and the front motor 6 simultaneously input power to the front drive shaft 1 and the middle drive shaft 2, the non-decoupled connection between the front drive shaft 1 and the middle drive shaft 2 allows the power to be evenly distributed between the two shafts, improving high-speed driving stability and stability on low-traction surfaces.

[0100] It should also be noted that in pure electric four-wheel drive mode, mechanical four-wheel drive mode or hybrid four-wheel drive mode, when the vehicle is in a downhill condition or braking condition, the second transmission component 9 can be engaged to transfer mechanical energy to the rear motor 8, and the rear motor 8 generates electricity, thereby realizing kinetic energy recovery.

[0101] In pure electric six-wheel drive mode, the rear motor 8 and the front motor 6 work simultaneously, the engine 4 does not work, and the first transmission assembly 7 and the second transmission assembly 9 are engaged; part of the power output by the front motor 6 is transmitted to the front drive shaft 1 through the first transmission assembly 7, causing the front drive shaft 1 to drive the front wheels to rotate, and the other part is transmitted to the middle drive shaft 2 through the first transmission assembly 7, causing the middle drive shaft 2 to drive the middle wheel to rotate; the power output by the rear motor 8 is transmitted to the rear drive shaft 3 through the second transmission assembly 9, causing the rear drive shaft 3 to drive the rear wheels to rotate, realizing six-wheel drive of the front wheels, middle wheels and rear wheels.

[0102] The hybrid six-wheel drive mode combines the power of the engine and the electric motor to drive the vehicle, providing strong power while extending the driving range and reducing range anxiety associated with pure electric six-wheel drive.

[0103] Depending on whether the front motor 6 is active, the hybrid six-wheel drive mode includes Hybrid Six-Wheel Drive Mode 1 and Hybrid Six-Wheel Drive Mode 2. In Hybrid Six-Wheel Drive Mode 1, the front motor 6 is active; in Hybrid Six-Wheel Drive Mode 2, the front motor 6 is inactive.

[0104] In hybrid six-wheel drive mode, engine 4, front motor 6, and rear motor 8 work simultaneously. Engine 4 is connected to front motor 6 via clutch 5, and the first transmission assembly 7 and the second transmission assembly 9 are engaged. Part of the power output from engine 4 is transmitted to front drive shaft 1, causing front drive shaft 1 to drive the front wheels, and the other part is transmitted to middle drive shaft 2, causing middle drive shaft 2 to drive the middle wheel. Part of the power output from front motor 6 is transmitted to front drive shaft 1 via the first transmission assembly 7, causing front drive shaft 1 to drive the front wheels, and the other part is transmitted to middle drive shaft 2 via the first transmission assembly 7, causing middle drive shaft 2 to drive the middle wheel. The power output from rear motor 8 is transmitted to rear drive shaft 3 via the second transmission assembly 9, causing rear drive shaft 3 to drive the rear wheels, thus achieving six-wheel drive of the front, middle, and rear wheels.

[0105] In hybrid six-wheel drive mode two, engine 4 and rear motor 8 work simultaneously, while front motor 6 is not working. Engine 4 is connected to front motor 6 through clutch 5, and the first transmission assembly 7 and the second transmission assembly 9 are engaged. Part of the power output from engine 4 is transmitted to front drive shaft 1, causing front drive shaft 1 to drive the front wheels to rotate, and the other part is transmitted to middle drive shaft 2, causing middle drive shaft 2 to drive the middle wheel to rotate. The power output from rear motor 8 is transmitted to rear drive shaft 3 through the second transmission assembly 9, causing rear drive shaft 3 to drive the rear wheels to rotate, thus realizing six-wheel drive of front wheels, middle wheels and rear wheels.

[0106] It should be noted that in hybrid six-wheel drive mode two, the front motor 6 does not participate in the operation, but the front motor 6 can generate electricity. When the rear motor 8 is low on power, the front motor 6 can transfer power to the rear motor 8 to provide power to the rear motor 8.

[0107] In some embodiments of this application, since the rear motor 8 only drives the rear drive shaft 3 to rotate, therefore, as Figure 1 As shown, the rear motor 8 is located at the rear of the vehicle, close to the rear drive shaft 3, in order to shorten the path of power transmission from the rear motor 8 to the rear drive shaft 3.

[0108] In some embodiments of this application, since the front motor 6 drives the front drive shaft 1 and the middle drive shaft 2 to rotate, therefore, as Figure 1 As shown, the front motor 6 is positioned between the front drive shaft 1 and the middle drive shaft 2 so that the path for power transmission to the front drive shaft 1 and the middle drive shaft 2 is not too long.

[0109] It should be noted that since engine 4 also drives the front drive shaft 1 and the middle drive shaft 2 to rotate, theoretically, with engine 4 located between the front drive shaft 1 and the middle drive shaft 2, the path for power transmission to the front drive shaft 1 and the middle drive shaft 2 will not be too long. However, based on other factors, engine 4 is usually located at the front of the vehicle. The location of engine 4 is common knowledge in the field and will not be elaborated further.

[0110] The aforementioned six-wheel drive system, by setting up three power sources—engine 4, front motor 6, and rear motor 8—can achieve any of the following drive modes: two-wheel drive, four-wheel drive, and six-wheel drive by arranging and combining these power sources. By selecting engine 4 drive, electric motor drive, or both engine 4 and electric motor drive simultaneously, it can achieve any of the following drive forms: mechanical drive, pure electric drive, and hybrid drive. This can improve power performance while also considering off-road capability and fuel economy. Through tuning the power system, various operating modes can be achieved, including series, parallel, and series-parallel configurations for PHEV (plug-in hybrid electric vehicle) and HEV (hybrid electric vehicle).

[0111] Based on the aforementioned six-drive system, this application also provides a vehicle that includes the aforementioned six-drive system.

[0112] The vehicle is equipped with the aforementioned six-wheel drive system, which not only allows for selection of two-wheel drive, four-wheel drive, or six-wheel drive according to actual working conditions, but also allows for selection of whether to use engine 4, electric motor, or both engine 4 and electric motor to provide power. The vehicle has multiple driving modes, good power performance, smoother power output, reduced fuel consumption, and good NVH performance. Using only dual motors to achieve hybridization reduces the cost per vehicle.

[0113] It's important to note that NVH is a key term in automotive engineering, representing Noise, Vibration, and Harshness, used to evaluate a vehicle's comfort and quietness. It's a crucial indicator of vehicle quality and directly impacts the driving experience.

[0114] It should be noted that the types of vehicles include, but are not limited to, off-road vehicles, and can be extended to six-by-six pickup trucks, light trucks, or heavy trucks.

[0115] It should also be noted that pure electric two-wheel drive mode is usually used when the vehicle starts. If it is mainly used for urban commuting, pure electric two-wheel drive or range-extended two-wheel drive is a more economical and practical choice. If you are looking for power and handling, pure electric four-wheel drive or hybrid four-wheel drive is more suitable. For off-road and extreme scenarios, mechanical four-wheel drive, pure electric six-wheel drive or hybrid six-wheel drive can better meet the requirements.

[0116] Through the description of several embodiments of the six-wheel drive system and vehicle of this application, it can be seen that the embodiments of the six-wheel drive system and vehicle of this application have at least one or more of the following advantages:

[0117] 1. By driving the rear wheels independently through the rear motor 8, pure electric two-wheel drive can be achieved, resulting in low fuel consumption and good vehicle fuel economy.

[0118] 2. The rear wheels are driven to rotate independently by the rear motor 8, and the engine 4 drives the front motor 6 to generate electricity, which can realize range-extended two-wheel drive and make the vehicle ride smooth.

[0119] 3. The front and rear wheels are driven by the front motor 6, which enables pure electric four-wheel drive. The vehicle has good stability at high speeds and on low-traction surfaces.

[0120] 4. By driving the front and middle wheels through the engine 4, mechanical four-wheel drive can be achieved. The vehicle has high power transmission efficiency, can withstand large torque output, and can also drive the front motor 6 to generate electricity, realizing charging while driving.

[0121] 5. By simultaneously driving the front and middle wheels with engine 4 and front motor 6, hybrid four-wheel drive can be achieved. This not only combines the advantages of engine 4 and motor, but also allows both to work together to provide excellent power performance when strong power is needed (such as acceleration and hill climbing). With engine 4 providing power and motor assistance, the driving range is long, and the handling and stability in complex road conditions are good.

[0122] 6. The front motor 6 drives the front and middle wheels to rotate, and the rear motor 8 drives the rear wheels to rotate, which can realize pure electric six-wheel drive. The vehicle has strong power output, good power performance, good load-bearing capacity, NVH performance, and good driving smoothness.

[0123] 7. By simultaneously driving the front and middle wheels with engine 4 and front motor 6, and driving the rear wheels with rear motor 8, hybrid six-wheel drive can be achieved. This not only combines the power of engine 4, front motor 6 and rear motor 8 to provide strong power, but also extends the driving range and reduces the range anxiety of pure electric six-wheel drive by generating electricity or directly driving the engine 4.

[0124] 8. When the vehicle is driving downhill or braking, the second transmission component 9 is engaged, which can convert mechanical energy into electrical energy for the rear motor 8, thereby realizing kinetic energy recovery.

[0125] 9. When the first transmission component 7 is disconnected, the engine 4 can be turned on to drive the front motor 6 to generate electricity, thereby increasing the vehicle's driving range.

[0126] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A six-drive force system, characterized in that, include: Front drive shaft (1); Central drive shaft (2); Rear drive shaft (3); Front motor (6); A first transmission assembly (7) is used to engage or disconnect the front motor (6) from the middle drive shaft (2), and to engage or disconnect the front motor (6) from the front drive shaft (1); Rear motor (8); The second transmission assembly (9) is used to engage or disengage the rear motor (8) from the rear drive shaft (3); The front motor (6) and the rear motor (8) operate independently of each other, and the second transmission component (9) and the first transmission component (7) operate independently of each other.

2. The six-drive force system according to claim 1, characterized in that, The front drive shaft (1) and the middle drive shaft (2) are non-decoupled, while the front drive shaft (1) and the rear drive shaft (3) and the middle drive shaft (2) and the rear drive shaft (3) are decoupled.

3. The six-drive force system according to claim 1, characterized in that, The six-drive system includes a pure electric two-drive mode. In the pure electric two-drive mode, the rear motor (8) is working, the front motor (6) is not working, the first transmission component (7) is disconnected, and the second transmission component (9) is engaged. The power output by the rear motor (8) is transmitted to the rear drive shaft (3) through the second transmission component (9).

4. The six-drive force system according to claim 1, characterized in that, The six-drive system includes a pure electric four-wheel drive mode. In the pure electric four-wheel drive mode, the front motor (6) is working, the rear motor (8) is not working, the first transmission component (7) is engaged, and the second transmission component (9) is disengaged. Part of the power output by the front motor (6) is transmitted to the front drive shaft (1) through the first transmission assembly (7), and the other part is transmitted to the middle drive shaft (2) through the first transmission assembly (7).

5. The six-drive force system according to claim 1, characterized in that, The six-drive system includes a pure electric six-drive mode. In the pure electric six-drive mode, the rear motor (8) and the front motor (6) work, and the first transmission component (7) and the second transmission component (9) engage. Part of the power output by the front motor (6) is transmitted to the front drive shaft (1) through the first transmission assembly (7), and the other part is transmitted to the middle drive shaft (2) through the first transmission assembly (7); The power output by the rear motor (8) is transmitted to the rear drive shaft (3) through the second transmission component (9).

6. The six-drive force system according to claim 1, characterized in that, It also includes an engine (4) and a clutch (5), the engine (4) being connected to the front motor (6) via the clutch (5), the engine (4) being connected to the front drive shaft (1) via the clutch (5), the front motor (6) and the first transmission assembly (7), and the engine (4) being connected to the middle drive shaft (2) via the clutch (5), the front motor (6) and the first transmission assembly (7).

7. The six-drive force system according to claim 6, characterized in that, The six-drive system includes a mechanical four-wheel drive mode. In the mechanical four-wheel drive mode, the engine (4) is working, the rear motor (8) and the front motor (6) are not working, and the engine (4) is connected to the front motor (6) through the clutch (5); the first transmission assembly (7) is engaged, and the second transmission assembly (9) is disengaged. The power output by the engine (4) is partly transmitted to the front drive shaft (1) and partly transmitted to the middle drive shaft (2).

8. The six-drive force system according to claim 6, characterized in that, The six-drive system includes a hybrid four-wheel drive mode. In the hybrid four-wheel drive mode, the engine (4) and the front motor (6) are working, the rear motor (8) is not working, and the engine (4) is connected to the front motor (6) through the clutch (5); the first transmission assembly (7) is engaged, and the second transmission assembly (9) is disengaged. The power output by the engine (4) is partly transmitted to the front drive shaft (1) and partly transmitted to the middle drive shaft (2); Part of the power output by the front motor (6) is transmitted to the front drive shaft (1) through the first transmission assembly (7), and the other part is transmitted to the middle drive shaft (2) through the first transmission assembly (7).

9. The six-drive force system according to claim 6, characterized in that, The six-drive system includes a hybrid six-drive mode. In the hybrid six-drive mode, both the engine (4) and the rear motor (8) are working, and the front motor (6) is working or not working. The engine (4) is connected to the front motor (6) through the clutch (5), and the first transmission assembly (7) and the second transmission assembly (9) are engaged. A portion of the power output from the engine (4) and / or the front motor (6) is transmitted to the front drive shaft (1), and another portion is transmitted to the middle drive shaft (2); The power output by the rear motor (8) is transmitted to the rear drive shaft (3) through the second transmission component (9).

10. A vehicle, characterized in that, Includes the six-drive system as described in any one of claims 1 to 9.

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