Power driving system and vehicle

Abstract

The utility model discloses a power driving system and a vehicle. A second wheel axle comprises a first half axle and a second half axle which are distributed in the transverse direction of the vehicle in a spaced mode. The first motor is in power connection with the first wheel axle through a first transmission structure so as to drive the first wheel axle to rotate; in the transverse direction of the vehicle, the second motor and the third motor are both located between the first half shaft and the second half shaft, the second motor is in power connection with the first half shaft through a second transmission structure so as to drive the first half shaft to rotate, and the third motor is in power connection with the second half shaft through a third transmission structure so as to drive the first half shaft to rotate. According to the power driving system, flexible and efficient vehicle driving is achieved, oil consumption is reduced, and fuel economy, power performance and controllability of a vehicle are improved; meanwhile, the axial size of the whole rear bridge is shortened, the structural compactness is improved, the arrangement space of a battery pack or an oil tank of the whole vehicle can be increased, and the endurance mileage is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle manufacturing, in particular to a power drive system and a vehicle. Background Art

[0002] With the continuous penetration of new energy technologies, more and more automakers are developing their own new energy strategies. Traditional ICE (ICE) vehicles, due to their large displacement, have high fuel consumption and will struggle to meet future fuel consumption regulations. Consequently, various automakers are exploring new energy technology routes for their vehicles. Currently, new energy vehicles on the market fall into three main categories: the first, based on traditional powertrains with minimal modifications, utilizes a P2 architecture; the second, a pure electric vehicle (EV) architecture, often employing high-powered three or four motors; and the third, a hybrid (PHEV) architecture, either with an extended-range or parallel-parallel system. Existing extended-range hybrid architectures suffer from high fuel consumption, a large electric axle axial dimension, and limited spacing between the front and rear axles, leaving room for improvement. Utility Model Content

[0003] This utility model aims to solve at least one of the technical problems existing in the prior art. To this end, it proposes a power drive system that emphasizes pure electric driving, reduces fuel consumption, and improves the vehicle's fuel economy, power performance, and maneuverability. It also shortens the overall axial dimension of the rear electric axle, improving structural compactness, increasing space for the vehicle's battery pack or fuel tank, and extending range.

[0004] According to an embodiment of the present invention, the power drive system includes: a first wheel axle and a second wheel axle, the first wheel axle and the second wheel axle are spaced apart along the longitudinal direction of the vehicle, and the second wheel axle includes a first half-axle and a second half-axle spaced apart along the transverse direction of the vehicle; an engine and a generator, the engine is used to drive the generator to generate electricity; a first motor, the first motor is connected to the first wheel axle through a first transmission structure for driving the first wheel axle to rotate; a second motor and a third motor, along the transverse direction of the vehicle, the second motor and the third motor are both located between the first half-axle and the second half-axle, the second motor is connected to the first half-axle through a second transmission structure for driving the first half-axle to rotate, and the third motor is connected to the second half-axle through a third transmission structure for driving the first half-axle to rotate.

[0005] According to the power drive system of the embodiment of the present invention, three motors are adopted to realize pure electric two-wheel drive and extended-range two-wheel drive functions, thereby realizing flexible and efficient vehicle drive. Compared with the traditional hybrid extended-range hybrid power system, the present invention highlights the pure electric driving function, reduces fuel consumption, and improves the vehicle's fuel economy, power performance and handling; at the same time, along the lateral direction of the vehicle, the second motor and the third motor are both located between the first half-shaft and the second half-shaft, shortening the overall axial dimension of the rear electric axle, reducing the additional space occupied by the second motor and the third motor, and improving the structural compactness. It can increase the layout space of the battery pack or fuel tank of the whole vehicle, improve the cruising range, and have better use effect and wider application range.

[0006] According to the power drive system of some embodiments of the present invention, the second transmission structure includes a second input shaft and a first transmission gear set, the second input shaft is connected to the power of the second motor, the second input shaft is provided with a first active input gear, the first half shaft is provided with a first active output gear, and the first transmission gear set is respectively engaged with the first active input gear and the first active output gear for transmission;

[0007] And / or, the third transmission structure includes a third input shaft and a second transmission gear set, the third input shaft is connected to the power of the third motor, the third input shaft is provided with a second active input gear, the second half shaft is provided with a second active output gear, and the second transmission gear set is respectively engaged with the second active input gear and the second active output gear for transmission.

[0008] According to the power drive system of some embodiments of the present invention, the first transmission gear set includes a second transmission gear and a third transmission gear arranged coaxially, the second transmission gear is meshed with the first active input gear for transmission, and the third transmission gear is meshed with the first active output gear for transmission;

[0009] And / or, the second transmission gear set includes a fourth transmission gear and a fifth transmission gear arranged coaxially, the fourth transmission gear is meshed with the second active input gear for transmission, and the fifth transmission gear is meshed with the second active output gear for transmission.

[0010] According to the power drive system of some embodiments of the present invention, the second motor and the third motor are parallel and spaced apart along the longitudinal direction of the vehicle;

[0011] And / or, the second input shaft and the third input shaft are distributed in parallel and spaced apart along the longitudinal direction of the vehicle.

[0012] According to the power drive system of some embodiments of the present invention, the second motor and the third motor are arranged opposite each other along the longitudinal direction of the vehicle.

[0013] According to the power drive system of some embodiments of the present invention, the second motor and the third motor are arranged opposite each other in the transverse direction of the vehicle.

[0014] According to the power drive system of some embodiments of the present invention, along the longitudinal direction of the vehicle, the first motor and the first transmission structure are both located between the first wheel axle and the second wheel axle;

[0015] And / or, the first wheel axle is the front wheel axle of the vehicle, and the second wheel axle is the rear wheel axle of the vehicle.

[0016] According to the power drive system of some embodiments of the present invention, the first transmission structure includes a first input shaft, a first intermediate shaft and a first transmission shaft, the first input shaft is provided with a first input gear, the first intermediate shaft is provided with a coaxially distributed first intermediate gear and a first transmission gear, and the first transmission shaft is provided with a first output gear;

[0017] The first input shaft is connected to the first motor power, and the first transmission shaft is connected to the first wheel axle power, the first input gear is meshed with the first intermediate gear for transmission, and the first transmission gear is meshed with the first output gear for transmission.

[0018] The utility model also provides a vehicle.

[0019] The vehicle according to the embodiment of the present invention is provided with any one of the power drive systems described above.

[0020] According to some embodiments of the present invention, in a vehicle, the engine and the generator are installed in a cabin; and / or the first motor and the first transmission structure are located under a floor of the vehicle.

[0021] The advantages of the vehicle and the power drive system compared to the prior art are the same and will not be described in detail here.

[0022] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0024] Figure 1 This is a schematic diagram of the principle of the power drive system according to an embodiment of the utility model. Figure 1 ;

[0025] Figure 2 This is a schematic diagram of the principle of the power drive system according to an embodiment of the utility model. Figure 2 .

[0026] Reference numerals:

[0027] Power drive system 100,

[0028] The first wheel axle 1, the second wheel axle 2, the first half-shaft 21, the first active output gear 211, the second half-shaft 22, the second active output gear 221,

[0029] The first motor 3, the second motor 4, the third motor 5,

[0030] First transmission structure 6, first input shaft 61, first input gear 611, first intermediate shaft 62, first intermediate gear 621, first transmission gear 622, first transmission shaft 63, first output gear 631,

[0031] The second transmission structure 7, the first transmission gear set 71, the second transmission gear 711, the third transmission gear 712, the second input shaft 72, the first active input gear 721,

[0032] The third transmission structure 8, the second transmission gear set 81, the fourth transmission gear 811, the fifth transmission gear 812, the third input shaft 82, the second driving input gear 821,

[0033] Differential 91, intermediate transfer case 92, front drive shaft 93, front wheels 94, rear wheels 95, engine 96, generator 97, synchronizer S1. DETAILED DESCRIPTION

[0034] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0036] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0037] Unless otherwise specified, the front-to-back direction in this application is the longitudinal direction of the vehicle, that is, the X direction; the left-right direction is the lateral direction of the vehicle, that is, the Y direction; and the up-down direction is the vertical direction of the vehicle, that is, the Z direction.

[0038] Reference below Figure 1-Figure 2 The power drive system 100 according to an embodiment of the present invention is described. The power drive system 100 highlights the pure electric driving function, reduces fuel consumption, and improves the vehicle's fuel economy, power performance and handling; at the same time, it shortens the overall axial dimension of the rear electric axle, improves the structural compactness, and can increase the layout space of the vehicle's battery pack or fuel tank, thereby improving the cruising range.

[0039] like Figure 1-Figure 2 As shown, a power drive system 100 according to an embodiment of the present invention includes: a first wheel axle 1, a second wheel axle 2, an engine 96, a generator 97, a first motor 3, a second motor 4 and a third motor 5.

[0040] The first wheel axle 1 and the second wheel axle 2 are used to connect the front and rear wheels to the vehicle body, so that the front and rear wheels can rotate to propel the vehicle forward or backward, ensuring smooth driving of the vehicle. The first wheel axle 1 and the second wheel axle 2 are spaced apart along the longitudinal direction of the vehicle, that is, the first wheel axle 1 and the second wheel axle 2 are spaced apart a certain distance along the front and rear direction of the vehicle, one is located at the front of the vehicle and the other is located at the rear of the vehicle, such as Figure 1 As shown, in this embodiment, the first wheel axle 1 is located at the front of the vehicle, and two front wheels 94 are connected at both ends. The second wheel axle 2 is located at the rear of the vehicle, and two rear wheels 95 are connected at both ends.

[0041] The second wheel axle 2 includes a first half-shaft 21 and a second half-shaft 22. The first half-shaft 21 and the second half-shaft 22 are spaced apart in the transverse direction of the vehicle, that is, the first half-shaft 21 and the second half-shaft 22 are coaxially arranged in the left-right direction of the vehicle, and there is an accommodating space between the first half-shaft 21 and the second half-shaft 22. One of the first half-shaft 21 and the second half-shaft 22 can be used to connect to the left rear wheel 95, and the other of the first half-shaft 21 and the second half-shaft 22 can be used to connect to the right rear wheel 95. That is, when the first half-shaft 21 is arranged on the left side of the vehicle and the second half-shaft 22 is arranged on the right side of the vehicle, the first half-shaft 21 is used to connect to the left rear wheel 95, and the second half-shaft 22 is used to connect to the right rear wheel 95. When the first half-shaft 21 is arranged on the right side of the vehicle and the second half-shaft 22 is arranged on the left side of the vehicle, the first half-shaft 21 is used to connect to the right rear wheel 95, and the second half-shaft 22 is used to connect to the left rear wheel 95. In this embodiment, Figure 1-Figure 2 As shown, the first half-shaft 21 is used to connect the left rear wheel 95, and the second half-shaft 22 is used to connect the right rear wheel 95, and the setting is highly flexible.

[0042] Power drive system 100 also includes an engine 96 and a generator 97. Engine 96 is used to drive generator 97 to generate electricity. That is, engine 96 can serve as a power generation source, providing electrical energy for the entire power drive system 100. Engine 96 and generator 97 can together constitute a range extender, generating electricity during range extension. Engine 96 and generator 97 can be matched according to performance requirements to provide electricity when the vehicle battery is low or additional power is needed. In actual design, engine 96 and generator 97 can be located in the engine compartment.

[0043] The first motor 3, the second motor 4 and the third motor 5 are electric drive devices, that is, the first motor 3, the second motor 4 and the third motor 5 are drive motors, which can be driven individually to rotate the first wheel axle 1 or the second wheel axle 2, or can be driven simultaneously to rotate the first wheel axle 1 and the second wheel axle 2 simultaneously.

[0044] Furthermore, the first motor 3 is power-connected to the first wheel axle 1 via the first transmission structure 6 to drive the first wheel axle 1 to rotate. Specifically, the first motor 3 can transmit power to the first wheel axle 1 via the first transmission structure 6, achieving power transmission from the first motor 3 to the first wheel axle 1. This allows the first motor 3 to drive the first wheel axle 1 to rotate, and the first wheel axle 1 can then drive the connected wheel to rotate. This enables electric propulsion of the vehicle, reducing fuel consumption and lowering fuel consumption.

[0045] And along the lateral direction of the vehicle, the second motor 4 and the third motor 5 are both located between the first half-shaft 21 and the second half-shaft 22. The second motor 4 is connected to the first half-shaft 21 through the second transmission structure 7 to drive the first half-shaft 21 to rotate, and the third motor 5 is connected to the second half-shaft 22 through the third transmission structure 8 to drive the first half-shaft 21 to rotate.

[0046] Specifically, an accommodating space is formed between the first half-shaft 21 and the second half-shaft 22, and the second motor 4 and the third motor 5 can both be placed in the accommodating space, that is, in actual setting, along the transverse direction of the vehicle, the second motor 4 and the third motor 5 can both be located between the first half-shaft 21 and the second half-shaft 22, and the second motor 4 and the first half-shaft 21 as well as the third motor 5 and the second half-shaft 22 are arranged together at the rear of the vehicle along the transverse direction of the vehicle, and the second motor 4 and the third motor 5 can both be located between the first half-shaft 21 and the second half-shaft 22. In this way, the overall axial dimension of the rear electric axle can be shortened, the additional space occupied by the second motor 4 and the third motor 5 is reduced, the structural compactness is improved, the layout space of the battery pack or fuel tank of the whole vehicle can be increased, and the cruising range is improved.

[0047] The second motor 4 is power-connected to the first axle 21 via the second transmission structure 7 to drive the first axle 21 to rotate. Specifically, the second motor 4 can transmit power to the first axle 21 via the second transmission structure 7, achieving power transmission from the second motor 4 to the first axle 21, allowing the second motor 4 to drive the first axle 21 to rotate, thereby driving the wheels connected thereto to rotate. The third motor 5 is power-connected to the second axle 22 via the third transmission structure 8 to drive the second axle 22 to rotate. Specifically, the third motor 5 can transmit power to the second axle 22 via the third transmission structure 8, achieving power transmission from the third motor 5 to the second axle 22, allowing the third motor 5 to drive the second axle 22 to rotate, thereby driving the wheels connected thereto to rotate. This enables electric propulsion of the vehicle, further reducing fuel consumption and lowering fuel consumption.

[0048] It should be noted that the power drive system 100 of this embodiment has different operating conditions, including pure electric operating conditions (pure electric front-wheel drive operating conditions, pure electric rear-wheel drive operating conditions and pure electric four-wheel drive operating conditions), extended-range operating conditions (extended-range front-wheel drive operating conditions, extended-range rear-wheel drive operating conditions and extended-range four-wheel drive operating conditions), braking energy recovery operating conditions and reversing operating conditions (controlling the first motor 3 to reverse, or controlling the second motor 4 and the third motor 5 to reverse).

[0049] (1) In the pure electric mode, the first motor 3, the second motor 4 and the third motor 5 are driven independently, that is, the first motor 3 is driven alone to rotate the first wheel axle 1, or the second motor 4 and the third motor 5 are driven to rotate the second wheel axle 2, thereby realizing the pure electric front-wheel drive mode or the pure electric rear-wheel drive mode. The first motor 3, the second motor 4 and the third motor 5 can also be driven simultaneously to rotate the first wheel axle 1 and the second wheel axle 2, thereby realizing the pure electric four-wheel drive mode. In this mode, the range extender does not work, and the engine 96 and the generator 97 are in the off state, which is suitable for short-distance driving or when the battery is fully charged.

[0050] (2) In the extended-range operating condition, the range extender is started, and the engine 96 drives the generator 97 to generate electricity. The range extender can be driven in conjunction with the first motor 3, or in conjunction with the second motor 4 and the third motor 5 to achieve an extended-range front-wheel drive operating condition or an extended-range rear-wheel drive operating condition. The range extender can also be driven in conjunction with the first motor 3, the second motor 4 and the third motor 5 at the same time to achieve an extended-range four-wheel drive operating condition.

[0051] That is to say, the electric energy generated by the generator 97 can be directly provided to the first motor 3, the second motor 4 and the third motor 5 to drive the first wheel axle 1 and the second wheel axle 2 to rotate, or it can be stored in the battery, and then the battery supplies power to the first motor 3, the second motor 4 and the third motor 5, so that the first motor 3, the second motor 4 and the third motor 5 can drive the first wheel axle 1 and the second wheel axle 2 to rotate. In this operating condition, the engine 96 does not directly drive the wheels, but provides electric energy to the first motor 3, the second motor 4 and the third motor 5 through the generator 97, which is suitable for long-distance driving or when the battery is insufficient and additional energy is required.

[0052] (3) In the braking energy recovery mode, when the vehicle brakes, braking energy is recovered through the first motor 3, the second motor 4 and the third motor 5. That is, when the vehicle brakes, the first motor 3, the second motor 4 and the third motor 5 can be used as a generator 97 to convert the kinetic energy of the vehicle into electrical energy and store it in the battery, which is beneficial to extend the battery life, improve the energy efficiency of the vehicle and reduce fuel consumption.

[0053] (4) In the reversing mode, the reversing function can be achieved by controlling the first motor 3 to rotate in reverse, or by controlling the second motor 4 and the third motor 5 to rotate in reverse.

[0054] According to the power drive system 100 of the embodiment of the present invention, three motors are adopted to realize pure electric two-wheel drive and extended-range two-wheel drive functions, thereby realizing flexible and efficient vehicle drive. Compared with the traditional hybrid extended-range hybrid power system, the present invention highlights the pure electric driving function, reduces fuel consumption, and improves the vehicle's fuel economy, power performance and controllability; at the same time, along the lateral direction of the vehicle, the second motor 4 and the third motor 5 are both located between the first half shaft 21 and the second half shaft 22, shortening the overall axial dimension of the rear electric axle, reducing the additional space occupied by the second motor 4 and the third motor 5, and improving the compactness of the structure. It can increase the layout space of the battery pack or fuel tank of the whole vehicle, improve the cruising range, and have better use effect and a wider range of applications.

[0055] In some embodiments, the second transmission structure 7 includes a second input shaft 72 and a first transmission gear set 71. The second input shaft 72 is connected to the power of the second motor 4. The second input shaft 72 is provided with a first active input gear 721. The first half shaft 21 is provided with a first active output gear 211. The first transmission gear set 71 is respectively engaged with the first active input gear 721 and the first active output gear 211 for transmission.

[0056] Specifically, if Figure 1-Figure 2 As shown, the second transmission structure 7 includes a second input shaft 72 and a first transmission gear set 71. The second input shaft 72 and the first transmission gear set 71 are spaced apart and distributed in parallel along the longitudinal direction of the vehicle, that is, along the front and rear directions of the vehicle. The first transmission gear set 71 can be arranged on the front side or the rear side of the second input shaft 72. The second input shaft 72 is connected to the second motor 4, and the second motor 4 is located between the first half shaft 21 and the second half shaft 22. In this way, the space occupied by the second motor 4 is reduced, and the positions of the second input shaft 72 and the first transmission gear set 71 are reasonably set, so that the first transmission gear set 71 is close to the second input shaft 72 and the first half shaft 21, which is conducive to efficient power transmission.

[0057] The second input shaft 72 is equipped with a first driving input gear 721, and the first axle 21 is equipped with a first driving output gear 211. The first transmission gear set 71 meshes with the first driving input gear 721 and the first driving output gear 211, respectively. Specifically, when the second motor 4 is operating, the second motor 4 drives the second input shaft 72 to rotate, which in turn drives the first driving input gear 721 to rotate synchronously. The first driving input gear 721 meshes with the first transmission gear set 71, which in turn drives the first transmission gear set 71 to rotate synchronously. Furthermore, the first transmission gear set 71 meshes with the first driving output gear 211, allowing the first driving output gear 211 to drive the first axle 21 to rotate synchronously. In this way, the second motor 4, the second input shaft 72, and the first transmission gear set 71 are all located between the first axle 21 and the second axle 22. This reduces the space occupied by the first driving input gear 721, further shortens the axial dimension of the rear electric axle, and enables power transmission from the second motor 4 to the second wheel axle 2.

[0058] In other embodiments, the third transmission structure 8 includes a third input shaft 82 and a second transmission gear set 81. The third input shaft 82 is connected to the power of the third motor 5. The third input shaft 82 is provided with a second active input gear 821. The second half shaft 22 is provided with a second active output gear 221. The second transmission gear set 81 is respectively engaged with the second active input gear 821 and the second active output gear 221 for transmission.

[0059] Specifically, if Figure 1-Figure 2 As shown, the third transmission structure 8 includes a third input shaft 82 and a second transmission gear set 81. The third input shaft 82 and the second transmission gear set 81 are spaced and distributed in parallel along the longitudinal direction of the vehicle, that is, along the front and rear directions of the vehicle. The second transmission gear set 81 can be arranged on the front side or rear side of the third input shaft 82. The third input shaft 82 is connected to the second motor 4, and the second motor 4 is located between the first half shaft 21 and the second half shaft 22. In this way, the space occupied by the second motor 4 is reduced, and the position of the third input shaft 82 and the second transmission gear set 81 is reasonably set, so that the second transmission gear set 81 is arranged close to the third input shaft 82 and the second half shaft 22, which is conducive to efficient power transmission.

[0060] The third input shaft 82 is equipped with a second driving input gear 821, and the second half-shaft 22 is equipped with a second driving output gear 221. The second transmission gear set 81 meshes with the second driving input gear 821 and the second driving output gear 221, respectively. Specifically, when the second motor 4 is operating, the second motor 4 drives the third input shaft 82 to rotate, which in turn drives the second driving input gear 821 to rotate synchronously. The second driving input gear 821 meshes with the second transmission gear set 81, which in turn drives the second transmission gear set 81 to rotate synchronously. Furthermore, the second transmission gear set 81 meshes with the second driving output gear 221, allowing the second driving output gear 221 to drive the second half-shaft 22 to rotate synchronously. Thus, the second motor 4, the third input shaft 82, and the second transmission gear set 81 are all located between the first half-shaft 21 and the second half-shaft 22. This reduces the space occupied by the second driving input gear 821, further shortens the axial dimension of the rear electric axle, and enables power transmission from the second motor 4 to the second wheel axle 2.

[0061] In some embodiments, the first transmission gear set 71 includes a coaxially arranged second transmission gear 711 and a third transmission gear 712 . The second transmission gear 711 is meshed with the first driving input gear 721 for transmission, and the third transmission gear 712 is meshed with the first driving output gear 211 for transmission.

[0062] Specifically, if Figure 1-Figure 2 As shown, the first transmission gear set 71 is provided with a second transmission gear 711 and a third transmission gear 712. The second transmission gear 711 and the third transmission gear 712 are coaxially arranged, so that when the second transmission gear 711 rotates, the third transmission gear 712 can be driven to rotate, and the second transmission gear 711 and the first active input gear 721 are meshed for transmission, and the third transmission gear 712 and the first active output gear 211 are meshed for transmission.

[0063] That is, when the second input shaft 72 rotates, it can drive the first driving input gear 721 to rotate synchronously. The first driving input gear 721 meshes with the second transmission gear 711 for transmission, thereby driving the second transmission gear 711 to rotate synchronously. The third transmission gear 712 can rotate together with the second transmission gear 711, so that the third transmission gear 712 can mesh with the first driving output gear 211 for transmission, so that the first driving output gear 211 drives the first half-shaft 21 to rotate synchronously. This can change the force transmission path, improve the structural compactness of the second transmission structure 7, and thereby increase the layout space for other structural components.

[0064] Furthermore, the number of teeth of the second transmission gear 711 and the third transmission gear 712 can be set to be the same or different during actual setting, thereby changing the speed ratio during speed transmission to meet more usage requirements.

[0065] In other embodiments, the second transmission gear set 81 includes a fourth transmission gear 811 and a fifth transmission gear 812 arranged coaxially. The fourth transmission gear 811 and the second active input gear 821 are meshed for transmission, and the fifth transmission gear 812 and the second active output gear 221 are meshed for transmission.

[0066] Specifically, if Figure 1-Figure 2 As shown, the second transmission gear set 81 is provided with a fourth transmission gear 811 and a fifth transmission gear 812. The fourth transmission gear 811 and the fifth transmission gear 812 are coaxially arranged, so that when the fourth transmission gear 811 rotates, the fifth transmission gear 812 can be driven to rotate, and the fourth transmission gear 811 and the second active input gear 821 are meshed for transmission, and the fifth transmission gear 812 and the second active output gear 221 are meshed for transmission.

[0067] That is, when the third input shaft 82 rotates, it can drive the second driving input gear 821 to rotate synchronously. The second driving input gear 821 is meshed with the fourth transmission gear 811 for transmission, and then the fourth transmission gear 811 is driven to rotate synchronously. Moreover, the fifth transmission gear 812 can rotate together with the fourth transmission gear 811, so that the fifth transmission gear 812 can be meshed with the second driving output gear 221 for transmission, so that the second driving output gear 221 drives the first half shaft 21 to rotate synchronously, thereby changing the force transmission path, improving the structural compactness of the third transmission structure 8, and increasing the layout space for other structural components.

[0068] Furthermore, the number of teeth of the fourth transmission gear 811 and the fifth transmission gear 812 can be set to be the same or different during actual setting, thereby changing the speed ratio during speed transmission to meet more usage requirements.

[0069] In some embodiments, the second motor 4 and the third motor 5 are distributed in parallel and spaced apart along the longitudinal direction of the vehicle.

[0070] Specifically, if Figure 1 As shown, the second motor 4 and the third motor 5 are both arranged between the first half shaft 21 and the second half shaft 22, and the second motor 4 and the third motor 5 are spaced apart and distributed along the longitudinal direction of the vehicle, that is, the second motor 4 can be arranged in front of the third motor 5, or the third motor 5 can be arranged in front of the second motor 4, and the second motor 4 and the third motor 5 can be completely opposite to each other along the front and rear direction of the vehicle, or can be partially opposite to each other along the front and rear direction of the vehicle, thereby reducing the space occupied by the second motor 4 and the third motor 5 in the left and right direction of the vehicle to improve the compactness of the structure.

[0071] In addition, the first wheel axle 1 and the second wheel axle 2 are distributed in parallel and spaced apart along the longitudinal direction of the vehicle, and the second motor 4 and the third motor 5 are also distributed in parallel and spaced apart along the longitudinal direction of the vehicle, so that the first wheel axle 1, the second wheel axle 2, the second motor 4 and the third motor 5 are all arranged in parallel, and thus the various structures can be reasonably and compactly arranged at the bottom of the vehicle, making the overall structure of the power drive system 100 compact, which is conducive to the orderly and efficient transmission of power.

[0072] In other embodiments, the second input shaft 72 and the third input shaft 82 are spaced apart and parallel to each other along the longitudinal direction of the vehicle.

[0073] Specifically, if Figure 1 As shown, the second motor 4 and the third motor 5 are both arranged between the first half shaft 21 and the second half shaft 22, the second input shaft 72 is connected to the power of the second motor 4, and the third input shaft 82 is connected to the power of the third motor 5, that is, the second motor 4, the second input shaft 72, the third motor 5 and the third input shaft 82 are all arranged between the first half shaft 21 and the second half shaft 22, and the second input shaft 72 and the third input shaft 82 are distributed in parallel and spaced along the longitudinal direction of the vehicle, and the first wheel axle 1 and the second wheel axle 2 are distributed in parallel and spaced along the longitudinal direction of the vehicle, so that the first wheel axle 1, the second wheel axle 2, the second input shaft 72 and the third input shaft 82 are all arranged in parallel, so that the various structures can be reasonably and compactly arranged at the bottom of the vehicle, so that the overall structure of the power drive system 100 is compact, which is conducive to the orderly and efficient transmission of power.

[0074] In some embodiments, the second motor 4 and the third motor 5 are arranged opposite each other in the longitudinal direction of the vehicle.

[0075] Specifically, the second motor 4 and the third motor 5 are both arranged between the first half-shaft 21 and the second half-shaft 22. The second motor 4 can drive the first half-shaft 21 to rotate through the second transmission structure 7, and the third motor 5 can drive the first half-shaft 21 to rotate through the third transmission structure 8, thereby ensuring the operating status of the first half-shaft 21 and the second half-shaft 22 while shortening the overall axial dimension of the rear electric axle.

[0076] And as Figure 1 As shown, the second motor 4 and the third motor 5 are distributed opposite each other in the longitudinal direction of the vehicle, so the second motor 4 can be arranged in front of the third motor 5, or the third motor 5 can be arranged in front of the second motor 4, so that the second motor 4 and the third motor 5 only need to occupy the size of one motor in the left and right directions of the vehicle, thereby reducing the additional space occupied by the second motor 4 and the third motor 5, improving the compactness of the structure, and the second motor 4 and the third motor 5 can be distributed on the front and rear sides of the second wheel axle 2 in the front and rear directions of the vehicle, thereby reducing the space occupied by the second motor 4, the second transmission structure 7, the third motor 5 and the third transmission structure 8 in the longitudinal direction of the vehicle, thereby ensuring the layout space of the battery pack or fuel tank of the whole vehicle and improving the cruising range.

[0077] In some embodiments, the second motor 4 and the third motor 5 are arranged opposite each other in the transverse direction of the vehicle.

[0078] Specifically, the second motor 4 and the third motor 5 are both arranged between the first half-shaft 21 and the second half-shaft 22. The second motor 4 can drive the first half-shaft 21 to rotate through the second transmission structure 7, and the third motor 5 can drive the first half-shaft 21 to rotate through the third transmission structure 8, thereby ensuring the operating status of the first half-shaft 21 and the second half-shaft 22 while shortening the overall axial size of the rear electric axle.

[0079] And as Figure 2 As shown, the second motor 4 and the third motor 5 are distributed opposite each other along the transverse direction of the vehicle, so the second motor 4 can be set on the left side and the third motor 5 can be set on the right side, or the second motor 4 can be set on the right side and the third motor 5 can be set on the left side, so that the second motor 4 and the third motor 5 only need to occupy the size of one motor in the front and rear direction of the vehicle, thereby reducing the additional space occupied by the second motor 4 and the third motor 5, improving the compactness of the structure, ensuring the layout space of the battery pack or fuel tank of the whole vehicle, and improving the cruising range.

[0080] In some embodiments, along the longitudinal direction of the vehicle, the first motor 3 and the first transmission structure 6 are both located between the first wheel axle 1 and the second wheel axle 2 .

[0081] Specifically, the first motor 3 and the first transmission structure 6 are located between the first wheel axle 1 and the second wheel axle 2 in the longitudinal direction of the vehicle, that is, in the front-rear direction of the vehicle. Figure 1-Figure 2 As shown, the first motor 3 and the first transmission structure 6 are located on the rear side of the first wheel axle 1 and the front side of the second wheel axle 2 .

[0082] Such an arrangement can fully utilize the space at the bottom of the vehicle, help keep the center of gravity of the vehicle at a lower position, and distribute the weight more evenly on the first wheel axle 1 and the second wheel axle 2 of the vehicle, thereby improving the stability and balance of the vehicle.

[0083] At the same time, the first motor 3 and the first transmission structure 6 are integrated together and arranged between the first wheel axle 1 and the second wheel axle 2, which can also reduce energy loss during power transmission and make it easier to cooperate with the range extender, namely the engine 96 and the generator 97, thereby improving driving efficiency.

[0084] In other embodiments, the first wheel axle 1 is the front wheel axle of the vehicle, and the second wheel axle 2 is the rear wheel axle of the vehicle.

[0085] That is to say, if Figure 1-Figure 2As shown, the first wheel axle 1 is located at the front of the vehicle and is connected to the front wheel 94. In this way, the first motor 3 can drive the first wheel axle 1, that is, the front wheel axle of the vehicle, to rotate, and then drive the two front wheels 94 to rotate, realizing front-wheel drive. The second wheel axle 2 is located at the rear of the vehicle and is connected to the rear wheel 95. In this way, the second motor 4 and the third motor 5 can drive the second wheel axle 2, that is, the rear wheel axle of the vehicle, to rotate, and then drive the two rear wheels 95 to rotate, realizing rear-wheel drive. When the first motor 3, the second motor 4 and the third motor 5 are driven at the same time, four-wheel drive is realized.

[0086] In some embodiments, as Figure 1-Figure 2 As shown, the first transmission structure 6 includes a first input shaft 61, a first intermediate shaft 62 and a first transmission shaft 63. The first input shaft 61, the first intermediate shaft 62 and the first transmission shaft 63 are spaced apart and distributed in parallel along the transverse direction of the vehicle, that is, along the left and right directions of the vehicle. The first intermediate shaft 62 is located between the first input shaft 61 and the first transmission shaft 63. In this way, the bottom space of the vehicle can be fully utilized to arrange the first transmission structure 6 to avoid interference between the various shafts. At the same time, the transverse arrangement of the various shafts also shortens the power transmission path from the first transmission shaft 63 to the front wheels 94, thereby improving the power transmission efficiency.

[0087] And as Figure 1-Figure 2 As shown, the first input shaft 61 is provided with a first input gear 611, the first intermediate shaft 62 is provided with a coaxially distributed first intermediate gear 621 and a first transmission gear 622, and the first transmission shaft 63 is provided with a first output gear 631. That is to say, when the first input shaft 61 rotates, it can drive the first input gear 611 to rotate synchronously, when the first intermediate shaft 62 rotates, it can drive the first intermediate gear 621 and the first transmission gear 622 to rotate, and when the first transmission gear 622 rotates, it can drive the first output gear 631 to rotate.

[0088] The first input shaft 61 is connected to the first motor 3 , and the first transmission shaft 63 is connected to the first wheel axle 1 . The first input gear 611 is meshed with the first intermediate gear 621 , and the first transmission gear 622 is meshed with the first output gear 631 .

[0089] Specifically, if Figure 1-Figure 2As shown, the motor shaft of the first motor 3 is connected to the first input shaft 61, the first input gear 611 is meshed with the first intermediate gear 621, and the first transmission gear 622 is meshed with the first output gear 631. Thus, the first motor 3 can provide power to drive the first input shaft 61 to rotate. When the first input shaft 61 rotates, the first input shaft 61 can drive the first input gear 611 to rotate, so that the first input gear 611 can drive the first intermediate gear 621 meshed therewith to rotate. When the first intermediate gear 621 rotates, it can drive the first intermediate shaft 62 and the first transmission gear 622 to rotate. Then, when the first transmission gear 622 rotates, it can drive the first output gear 631 meshed therewith to drive the first transmission shaft 63 to rotate, thereby achieving power transmission from the first motor 3 to the first transmission shaft 63.

[0090] In actual design, the first drive shaft 63 can be power-connected to the first wheel axle 1 via the front drive shaft 93 and the differential 91. That is, the power of the first drive shaft 63 can be transmitted to the front drive shaft 93 and the differential 91, and then to the first wheel axle 1, thereby achieving power connection and power transmission from the first drive shaft 63 to the first wheel axle 1. The differential action of the differential 91 can also enable the front left and right wheels to rotate at different speeds. The first transmission structure 6 can also be disposed in the intermediate transfer case 92 to ensure stable transmission of the first transmission structure 6.

[0091] The utility model also provides a vehicle.

[0092] The vehicle according to the embodiment of the present invention is provided with any one of the power drive systems 100 described above.

[0093] According to the vehicle of the embodiment of the present invention, three motors are adopted to realize pure electric two-wheel drive and extended-range two-wheel drive functions, thereby realizing flexible and efficient vehicle drive. Compared with the traditional hybrid extended-range hybrid power system, the present invention highlights the pure electric driving function, reduces fuel consumption, and improves the fuel economy, power performance and controllability of the vehicle; at the same time, along the lateral direction of the vehicle, the second motor 4 and the third motor 5 are both located between the first half shaft 21 and the second half shaft 22, shortening the overall axial dimension of the rear electric axle, reducing the additional space occupied by the second motor 4 and the third motor 5, and improving the compactness of the structure. It can increase the layout space of the battery pack or fuel tank of the whole vehicle, improve the cruising range, and have better use effect and wider application range.

[0094] The vehicle of this embodiment may be an off-road vehicle, a sedan, a pickup truck, an SUV, etc.

[0095] In some embodiments, the engine 96 and the generator 97 are mounted within the nacelle.

[0096] Specifically, if Figure 1-Figure 2As shown, the engine 96 and the generator 97 are arranged at the front of the vehicle. In this way, the engine 96 and the generator 97, i.e., the range extender, can be installed in the engine compartment to ensure the normal operation of the engine 96 and the generator 97 and reduce the impact on the surrounding environment, which is convenient for maintenance and operation. The arrangement is longitudinal, that is, the engine 96 and the generator 97 are arranged in sequence along the front and rear directions, and the generator 97 is arranged close to the first motor 3, which is conducive to transmitting electrical energy to the first motor 3. Of course, in practice, since the range extender does not directly participate in the driving, the engine 96 and the generator 97 can also be installed horizontally in the engine compartment, and can be flexibly arranged according to the space of the entire vehicle, and is not limited to the description in this embodiment.

[0097] In other embodiments, the first motor 3 and the first transmission structure 6 are located under the vehicle floor.

[0098] Specifically, refer to Figure 1-Figure 2 As shown, the first motor 3 and the first transmission structure 6 are roughly located in the middle of the vehicle. The first motor 3 and the first transmission structure 6 can be set under the vehicle floor. This is beneficial to lowering the center of gravity of the vehicle and to facilitate the power of the first motor 3 to directly drive the first wheel axle 1 through the first transmission structure 6.

[0099] In some embodiments, a differential lock may also be provided on the differential 91 , which may be flexibly provided according to the actual needs of the vehicle.

[0100] The following is the power transmission path of the power drive system 100 of the present invention under different operating conditions:

[0101] (1) In pure electric front-wheel drive mode, the first motor 3 is driven independently, and the power of the first motor 3 is transmitted to the first wheel axle 1 through the first transmission structure 6, and then transmitted to the front wheels 94 to drive the vehicle. The high gear or low gear can be selected through the synchronizer S1. The low gear can be combined with the differential lock to improve the low-speed escape ability, and the high gear can ensure high speed while taking into account fuel economy.

[0102] (2) In pure electric rear-wheel drive mode, the second motor 4 and the third motor 5 are driven, the power of the second motor 4 is transmitted to the first half-shaft 21 through the second transmission structure 7, and the power of the third motor 5 is transmitted to the second half-shaft 22 through the third transmission structure 8, and then transmitted to the two rear wheels 95 to drive the vehicle.

[0103] (3) In pure electric four-wheel drive operation, the first motor 3, the second motor 4 and the third motor 5 are driven simultaneously, and their power is transmitted to the first wheel axle 1 and the second wheel axle 2 through the first transmission structure 6, the second transmission structure 7 and the third transmission mechanism respectively, and then transmitted to the front wheels 94 and the rear wheels 95 to drive the vehicle. The synchronizer S1 can be adjusted to select the appropriate gear according to the driving conditions.

[0104] (4) In the extended-range front-wheel drive mode, the range extender works, that is, the generator 97 generates electricity and transmits the electric energy to the first motor 3, and the first motor 3 drives. The subsequent driving mode is the same as the pure electric front-wheel drive mode.

[0105] (5) In the extended-range rear-wheel drive mode, the range extender works, that is, the generator 97 generates electricity and transmits the electric energy to the second motor 4 and the third motor 5, and the second motor 4 and the third motor 5 are driven. The subsequent driving mode is the same as the pure electric rear-wheel drive mode.

[0106] (6) In the extended-range four-wheel drive mode, the range extender works, that is, the generator 97 generates electricity and transmits the electric energy to the first motor 3, the second motor 4 and the third motor 5. The first motor 3, the second motor 4 and the third motor 5 are driven simultaneously, and the subsequent driving mode is the same as the pure electric four-wheel drive mode.

[0107] (7) During the braking energy recovery operation, the vehicle performs braking energy recovery through the first motor 3, the second motor 4 and the third motor 5. That is, when the vehicle brakes, the first motor 3, the second motor 4 and the third motor 5 can be used as a generator 97 to convert the vehicle's kinetic energy into electrical energy and store it in the battery, which is beneficial to extend the battery's range, improve the vehicle's energy efficiency and reduce fuel consumption.

[0108] (8) In the reversing state, the reversing function can be realized by controlling the reverse rotation of the first motor 3 or the second motor 4 and the third motor 5.

[0109] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the illustrative use of the above terms does 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 any one or more embodiments or examples.

[0110] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A power drive system, characterized in that: include: a first wheel axle and a second wheel axle, wherein the first wheel axle and the second wheel axle are spaced apart in the longitudinal direction of the vehicle, and the second wheel axle includes a first half-axle and a second half-axle spaced apart in the transverse direction of the vehicle; An engine and a generator, wherein the engine is used to drive the generator to generate electricity; a first motor, the first motor being dynamically connected to the first wheel axle via a first transmission structure, so as to drive the first wheel axle to rotate; The second motor and the third motor are located between the first half-shaft and the second half-shaft in the lateral direction of the vehicle. The second motor is connected to the first half-shaft through a second transmission structure to drive the first half-shaft to rotate. The third motor is connected to the second half-shaft through a third transmission structure to drive the first half-shaft to rotate.

2. The power drive system according to claim 1, characterized in that: The second transmission structure includes a second input shaft and a first transmission gear set, the second input shaft is connected to the second motor power, the second input shaft is provided with a first driving input gear, the first half shaft is provided with a first driving output gear, and the first transmission gear set is respectively meshed with the first driving input gear and the first driving output gear for transmission; And / or, the third transmission structure includes a third input shaft and a second transmission gear set, the third input shaft is connected to the power of the third motor, the third input shaft is provided with a second active input gear, the second half shaft is provided with a second active output gear, and the second transmission gear set is respectively engaged with the second active input gear and the second active output gear for transmission.

3. The power drive system according to claim 2, characterized in that: The first transmission gear set includes a second transmission gear and a third transmission gear arranged coaxially, the second transmission gear is meshed with the first active input gear for transmission, and the third transmission gear is meshed with the first active output gear for transmission; And / or, the second transmission gear set includes a fourth transmission gear and a fifth transmission gear arranged coaxially, the fourth transmission gear is meshed with the second active input gear for transmission, and the fifth transmission gear is meshed with the second active output gear for transmission.

4. The power drive system according to claim 2, characterized in that: The second motor and the third motor are parallel and spaced apart along the longitudinal direction of the vehicle; And / or, the second input shaft and the third input shaft are distributed in parallel and spaced apart along the longitudinal direction of the vehicle.

5. The power drive system according to claim 2, characterized in that: The second motor and the third motor are arranged opposite to each other in the longitudinal direction of the vehicle.

6. The power drive system according to claim 1, characterized in that: The second motor and the third motor are arranged opposite to each other in a transverse direction of the vehicle.

7. The power drive system according to any one of claims 1 to 6, characterized in that: Along the longitudinal direction of the vehicle, the first motor and the first transmission structure are both located between the first wheel axle and the second wheel axle; And / or, the first wheel axle is the front wheel axle of the vehicle, and the second wheel axle is the rear wheel axle of the vehicle.

8. The power drive system according to any one of claims 1 to 6, characterized in that: The first transmission structure includes a first input shaft, a first intermediate shaft and a first transmission shaft, the first input shaft is provided with a first input gear, the first intermediate shaft is provided with a first intermediate gear and a first transmission gear distributed coaxially, and the first transmission shaft is provided with a first output gear; The first input shaft is connected to the first motor power, and the first transmission shaft is connected to the first wheel axle power, the first input gear is meshed with the first intermediate gear for transmission, and the first transmission gear is meshed with the first output gear for transmission.

9. A vehicle, characterized in that: A power drive system according to any one of claims 1 to 8 is provided.

10. The vehicle according to claim 9, characterized in that The engine and generator are installed in the engine room; And / or, the first motor and the first transmission structure are located under the vehicle floor.

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