Power driving system and vehicle

Abstract

The utility model discloses a power-driven system and a vehicle, the power-driven system comprises a first wheel axle and a second wheel axle, the first wheel axle and the second wheel axle are distributed at intervals along the longitudinal direction of the vehicle; the engine is used for driving the generator to generate electricity; 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; the second wheel shaft comprises a first half shaft and a second half shaft, and the second motor is selectively in power connection with the first half shaft and the second half shaft through a second transmission structure so as to drive at least one of the first half shaft and the second half shaft to rotate. According to the power driving system, the pure electric driving function is highlighted, the oil consumption is reduced, the fuel economy of the vehicle is improved, the two rear wheels can be better controlled, the controllability of the vehicle is improved, and then the limit operation stability and the escape capacity of the vehicle are improved.

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 with the power drive system. Background Art

[0002] With the continuous penetration of new energy technologies, more and more car companies have their own new energy routes. In vehicles, traditional ICE power has high fuel consumption due to the large-displacement engine, and it is difficult to meet future fuel consumption regulations. Car companies are exploring new energy technology routes for vehicles. There are three main types of new energy vehicles on the current market: the first type is based on traditional power with minimal changes, using the P2 architecture; the second type adopts a pure electric EV architecture, mostly using high-power three or four motors; the third type is a hybrid architecture PHEV, either extended-range or hybrid.

[0003] In the existing extended-range hybrid architecture, fuel consumption is high, and extreme handling stability and escape capabilities are poor, leaving room for improvement. Utility Model Content

[0004] 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 highlights the pure electric driving function, reduces fuel consumption, improves the fuel economy of the vehicle, and better controls the two rear wheels, improving the vehicle's maneuverability, thereby enhancing the vehicle's extreme handling stability and escape ability.

[0005] 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; 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 by power through a first transmission structure, so as to drive the first wheel axle to rotate; a second motor, the second wheel axle includes a first half-shaft and a second half-shaft, the second motor is selectively connected to the first half-shaft and the second half-shaft respectively by power through a second transmission structure, so as to drive at least one of the first half-shaft and the second half-shaft to rotate.

[0006] According to the power drive system of the embodiment of the present invention, two motors are used to realize pure electric two-wheel drive and extended-range two-wheel drive functions, thereby realizing flexible and efficient vehicle drive. In the extended-range working condition, the range extender composed of the engine and the generator can provide additional electric energy for the vehicle. 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 of the vehicle; through the second motor, power is selectively transmitted to the first half shaft and the second half shaft respectively, the two rear wheels can be better controlled, the vehicle's controllability is improved, and the vehicle's extreme handling stability and escape ability are improved.

[0007] According to the power drive system of some embodiments of the present invention, the second transmission structure includes a first clutch, a second clutch and a transmission gear set, the second motor is power-connected to the transmission gear set, the transmission gear set is selectively power-connected to the first half-shaft through the first clutch, and the transmission gear set is selectively power-connected to the second half-shaft through the second clutch.

[0008] According to the power drive system of some embodiments of the present invention, the transmission gear set includes a first intermediate shaft and a first transmission shaft, the second motor is provided with a first motor gear, the first intermediate shaft is provided with a first intermediate gear and a second intermediate gear, and the first transmission shaft is provided with a first transmission gear; wherein, the first motor gear is meshed with the first intermediate gear, the second intermediate gear is meshed with the first transmission gear, the first clutch is connected between one end of the first transmission shaft and the first half shaft, and the second clutch is connected between the other end of the first transmission shaft and the second half shaft.

[0009] According to the power drive system of some embodiments of the present invention, along the longitudinal direction of the vehicle, the generator and the first motor are located between the first wheel axle and the second wheel axle; and / or, the second motor is located on the side of the second wheel axle away from the first wheel axle; and / or, the first motor and the first transmission structure are both located between the first wheel axle and the second wheel axle.

[0010] According to the power drive system of some embodiments of the present invention, 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.

[0011] According to the power drive system of some embodiments of the present invention, the first transmission structure includes a first input shaft, a second intermediate shaft and a second transmission shaft, the first input shaft is provided with a first input gear, the second intermediate shaft is provided with a coaxially distributed third intermediate gear and a fourth transmission gear, and the second transmission shaft is provided with a first output gear; wherein, the first input shaft is connected to the power of the first motor, and the second transmission shaft is connected to the power of the first wheel axle, the first input gear is meshed with the third intermediate gear for transmission, and the fourth transmission gear is meshed with the first output gear for transmission.

[0012] According to the power drive system of some embodiments of the present invention, there are multiple first input gears, and the multiple first input gears are distributed at intervals along the axial direction of the first input shaft; there are multiple third intermediate gears, and the multiple third intermediate gears are meshed with the multiple first input gears one-to-one, and the multiple third intermediate gears are loosely mounted outside the second intermediate shaft and are suitable for being selectively fixed to the second intermediate shaft.

[0013] The utility model also provides a vehicle.

[0014] A vehicle according to an embodiment of the present invention is provided with the power drive system described in any one of the above embodiments.

[0015] In some embodiments, the engine and the generator are installed in a cabin; and / or the first motor and the first transmission structure are located under a vehicle floor.

[0016] The advantages of the vehicle and the above-mentioned power drive system over the prior art are the same and will not be repeated here.

[0017] 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

[0018] 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:

[0019] Figure 1 It is a schematic diagram of the principle of a power drive system according to an embodiment of the present utility model.

[0020] Reference numerals:

[0021] Power drive system 100,

[0022] First wheel axle 1, second wheel axle 2, first half axle 21, second half axle 22,

[0023] Engine 3, generator 4, first motor 5, second motor 6, first motor gear 61,

[0024] First transmission structure 7, first input shaft 71, first input gear 711, second intermediate shaft 72, third intermediate gear 721, fourth transmission gear 722, second transmission shaft 73, first output gear 731,

[0025] The second transmission structure 8, the first clutch 81, the second clutch 82, the transmission gear set 83, the first intermediate shaft 831, the first intermediate gear 8311, the second intermediate gear 8312, the first transmission shaft 832, the first transmission gear 8321,

[0026] Front differential 91, front drive shaft 92, front wheel 94, left rear wheel 951, right rear wheel 952, intermediate transfer case 96, rear reduction box 97, synchronizer S1. DETAILED DESCRIPTION

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] Reference below Figure 1 A 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, improves the fuel economy of the vehicle, and can better control the two rear wheels, thereby improving the vehicle's controllability, thereby improving the vehicle's extreme handling stability and escape ability.

[0032] like Figure 1 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 3, a generator 4, a first motor 5 and a second motor 6.

[0033] 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. For example, referring to the attached Figure 1 As shown, the first wheel axle 1 is located at the front of the vehicle and connected to the front wheels 94, and the second wheel axle 2 is located at the rear of the vehicle and connected to the rear wheels.

[0034] Power drive system 100 also includes an engine 3 and a generator 4. Engine 3 is used to drive generator 4 to generate electricity. That is, engine 3 can serve as a power generation source, providing electrical energy for the entire power drive system 100. Engine 3 and generator 4 can together constitute a range extender, generating electricity during range extension. Engine 3 and generator 4 can be matched according to performance requirements to provide electricity when the vehicle battery is low or requires additional power. In actual design, engine 3 and generator 4 can be located in the engine compartment.

[0035] The first motor 5 and the second motor 6 are electric drive devices, which can drive one motor alone to rotate the first wheel axle 1 or the second wheel axle 2, or drive both motors at the same time to rotate the first wheel axle 1 and the second wheel axle 2 at the same time, so that when the range extender is turned off, the pure electric dual-four-wheel drive function can be realized; when the range extender is working, the electric energy generated by the generator 4 can be transmitted to the first motor 5 or the second motor 6, or to the first motor 5 and the second motor 6 at the same time, so as to realize the extended-range dual-four-wheel drive function and reduce fuel consumption.

[0036] Furthermore, the first motor 5 is power-connected to the first axle 1 via the first transmission structure 7 to drive the rotation of the first axle 1. Specifically, the first motor 5 can transmit power to the first axle 1 via the first transmission structure 7, achieving power transmission from the first motor 5 to the first axle 1. This allows the first motor 5 to drive the first axle 1, which in turn drives the connected wheel. This allows the first motor 5 to electrically propel the vehicle, reducing fuel consumption and lowering fuel consumption.

[0037] Furthermore, the second wheel axle 2 includes a first half-shaft 21 and a second half-shaft 22, and the second motor 6 is selectively connected to the first half-shaft 21 and the second half-shaft 22 through the second transmission structure 8 to drive at least one of the first half-shaft 21 and the second half-shaft 22 to rotate.

[0038] Specifically, when the second wheel axle 2 is located at the rear of the vehicle, the first half-shaft 21 and the second half-shaft 22 can be the rear left half-shaft and the rear right half-shaft. The rear left half-shaft can be connected to the left rear wheel 951 of the vehicle to transmit power to the left rear wheel 951 and drive the left rear wheel 951 to rotate. The rear right half-shaft can be connected to the right rear wheel 952 of the vehicle to transmit power to the right rear wheel 952 and drive the right rear wheel 952 to rotate. The second motor 6 can be selectively transmitted to the first half-shaft 21 and the second half-shaft 22 respectively through the second transmission structure 8, that is, the second transmission structure 8 can be selectively connected to the first half-shaft 21 and the second half-shaft 22 at the same time, so that the power of the second motor 6 can be transmitted to the first half-shaft 21 and the second half-shaft 22 at the same time, thereby driving the first half-shaft 21 and the second half-shaft 22 to rotate at the same time, or selectively connected to one half-shaft, the first half-shaft 21 or the second half-shaft 22, so that the power of the second motor 6 can be transmitted to one of the first half-shaft 21 or the second half-shaft 22, thereby driving one of the first half-shaft 21 and the second half-shaft 22 to rotate.

[0039] Thus, the vehicle is electrically driven by the second motor 6, which further reduces the use of fuel and reduces fuel consumption. The second motor 6 selectively transmits power to the first half-shaft 21 and the second half-shaft 22 respectively, which can better control the two rear wheels, improve the vehicle's controllability, and further improve the vehicle's extreme handling stability and escape ability.

[0040] According to the power drive system 100 of the embodiment of the present invention, two motors are used to realize pure electric two-wheel drive and extended-range two-wheel drive functions, thereby realizing flexible and efficient vehicle driving. In the extended-range working condition, the range extender composed of the engine 3 and the generator 4 can provide additional electric energy for the vehicle. 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 of the vehicle; through the second motor 6, power is selectively transmitted to the first half shaft 21 and the second half shaft 22 respectively, which can better control the two rear wheels, improve the vehicle's controllability, and thereby improve the vehicle's extreme handling stability and escape ability.

[0041] In some embodiments, as Figure 1 As shown, the second transmission structure 8 includes a first clutch 81, a second clutch 82 and a transmission gear set 83. The second motor 6 is power-connected to the transmission gear set 83. The transmission gear set 83 is selectively power-connected to the first half shaft 21 through the first clutch 81. The transmission gear set 83 is selectively power-connected to the second half shaft 22 through the second clutch 82.

[0042] That is to say, the power provided by the second motor 6 can be transmitted to the transmission gear set 83 to drive the transmission gear set 83 to operate, thereby realizing the adjustment of the speed and torque. The transmission gear set 83 can be selectively connected to the first half shaft 21 through the first clutch 81 to realize power transmission or power disconnection from the transmission gear set 83 to the first half shaft 21, that is, when the first clutch 81 is closed, the transmission gear set 83 can transmit power to the first half shaft 21, and when the first clutch 81 is disconnected, the transmission gear set 83 cannot transmit power to the first half shaft 21.

[0043] The transmission gear set 83 can be selectively power-connected to the second half-shaft 22 through the second clutch 82, thereby realizing power transmission or power disconnection from the transmission gear set 83 to the second half-shaft 22, that is, when the second clutch 82 is closed, the transmission gear set 83 can transmit power to the second half-shaft 22, and when the second clutch 82 is disconnected, the transmission gear set 83 cannot transmit power to the second half-shaft 22.

[0044] Therefore, the power transmission path of the first half-shaft 21 and the second half-shaft 22 is disconnected or connected by opening and closing the first clutch 81 and the second clutch 82, thereby realizing flexible distribution and transmission of power to meet the different power requirements of the vehicle, and the degree of compression of the first clutch 81 and the second clutch 82 can be adjusted to transmit different sizes of torque to the first half-shaft 21 and the second half-shaft 22, and then different sizes of torque can be transmitted to the left rear wheel 951 and the right rear wheel 952, realizing torque vector distribution of the two rear wheels, better controlling the two rear wheels, and improving the vehicle's extreme operation and escape ability.

[0045] In actual design, the second transmission structure 8 can be arranged in the rear reduction box 97 to protect the second transmission structure 8 and ensure stable transmission of the second transmission structure 8.

[0046] In some embodiments, as Figure 1 As shown, the transmission gear set 83 includes a first intermediate shaft 831 and a first transmission shaft 832. The second motor 6, the first intermediate shaft 831 and the first transmission shaft 832 are arranged in sequence along the longitudinal direction of the vehicle, i.e., the front-to-back direction. The first intermediate shaft 831 is located between the second motor 6 and the first transmission shaft 832. The first transmission shaft 832 is coaxially arranged with the second wheel axle 2. In this way, the power transmission path can be simplified and the power transmission efficiency from the second motor 6 to the second wheel axle 2 can be improved.

[0047] like Figure 1 As shown, the second motor 6 is provided with a first motor gear 61, the first intermediate shaft 831 is provided with a first intermediate gear 8311 and a second intermediate gear 8312, and the first transmission shaft 832 is provided with a first transmission gear 8321. That is, the second motor 6 can drive the first motor gear 61 to rotate, and when the first intermediate shaft 831 rotates, the first intermediate gear 8311 and the second intermediate gear 8312 can be driven to rotate.

[0048] Furthermore, the gear of the first motor 5 is engaged with the first intermediate gear 8311, the second intermediate gear 8312 is engaged with the first transmission gear 8321, the first clutch 81 is connected between one end of the first transmission shaft 832 and the first half shaft 21, and the second clutch 82 is connected between the other end of the first transmission shaft 832 and the second half shaft 22.

[0049] Specifically, if Figure 1 As shown, the first motor gear 61 is engaged with the first intermediate gear 8311, the second intermediate gear 8312 is engaged with the first transmission gear 8321, the first clutch 81 is connected between the right end of the first transmission shaft 832 and the first half shaft 21, the first half shaft 21 is the right half shaft shown in the figure, which is connected to the right rear wheel 952, the second clutch 82 is connected between the left end of the first transmission shaft 832 and the second half shaft 22, the second half shaft 22 is the left half shaft shown in the figure, which is connected to the left rear wheel 951.

[0050] Therefore, when the first motor 5 drives the first motor gear 61 to rotate, the first motor gear 61 can drive the first intermediate gear 8311 meshing with it to rotate, and then the rotation of the first intermediate gear 8311 can drive the first intermediate shaft 831 and the second intermediate gear 8312 to rotate, and then the second intermediate gear 8312 can drive the first transmission gear 8321 and the first transmission shaft 832 to rotate, thereby realizing power transmission from the first motor 5 to the first transmission shaft 832.

[0051] The selective transmission of power between the first transmission shaft 832 and the first half-shaft 21 can be achieved by opening and closing the first clutch 81, that is, when the first clutch 81 is closed, power can be transmitted from the right end of the first transmission shaft 832 to the first half-shaft 21, so that the first half-shaft 21 can rotate, and the torque transmitted to the first half-shaft 21 can also be adjusted by adjusting the degree of compression of the first clutch 81.

[0052] The selective transmission of power between the first transmission shaft 832 and the second half-shaft 22 can be achieved by opening and closing the second clutch 82, that is, when the second clutch 82 is closed, power can be transmitted from the left end of the first transmission shaft 832 to the second half-shaft 22, so that the second half-shaft 22 can rotate. The torque transmitted to the second half-shaft 22 can also be adjusted by adjusting the degree of compression of the second clutch 82, so that the torque of the first half-shaft 21 and the second half-shaft 22 can be different, and then the torque of the two rear wheels can be different, thereby realizing torque vector distribution of the two rear wheels and improving the vehicle's extreme operation and escape ability.

[0053] In some embodiments, the generator 4 and the first motor 5 are located between the first wheel axle 1 and the second wheel axle 2 in the longitudinal direction of the vehicle.

[0054] That is, the generator 4 and the first motor 5 are located between the first wheel axle 1 and the second wheel axle 2 in the front-rear direction of the vehicle. Figure 1 As shown, the generator 4 is located at the rear side of the first wheel axle 1 , the first motor 5 is located at the front side of the second wheel axle 2 , and the first motor 5 is located between the generator 4 and the second wheel axle 2 .

[0055] Such an arrangement makes the overall structure of the power drive system 100 more compact, which is conducive to achieving efficient power transmission and improving the driving efficiency of the vehicle. The generator 4 is close to the first motor 5 and can better cooperate with the first motor 5 to perform power transmission and improve the energy efficiency of the vehicle.

[0056] In other embodiments, the second motor 6 is located on a side of the second wheel axle 2 away from the first wheel axle 1 .

[0057] Specifically, if Figure 1 As shown, the second motor 6 is located on the rear side of the second wheel axle 2, that is, the side of the second wheel axle 2 away from the first wheel axle 1. In this way, the second motor 6 can be prevented from interfering with other components such as the first transmission structure 7 and the first motor 5, thereby ensuring the normal operation of the second transmission structure 8. Placing the second motor 6 on the side away from the first wheel axle 1 is conducive to balancing the weight distribution of the vehicle, making the center of gravity of the vehicle more stable, reducing the roll and bumps during driving, and improving ride comfort and handling.

[0058] In other embodiments, the first motor 5 and the first transmission structure 7 are both located between the first wheel axle 1 and the second wheel axle 2 .

[0059] That is, the first motor 5 and the first transmission structure 7 are located between the first wheel axle 1 and the second wheel axle 2 in the front-rear direction of the vehicle. Figure 1 As shown, the first motor 5 and the first transmission structure 7 are located on the rear side of the first wheel axle 1 and the front side of the second wheel axle 2 .

[0060] Such an arrangement can make full use of the space at the bottom of the vehicle, which is conducive to keeping the center of gravity of the vehicle at a lower position, and the weight is more evenly distributed on the first wheel axle 1 and the second wheel axle 2 of the vehicle, thereby improving the stability and balance of the vehicle. At the same time, the first motor 5 and the first transmission structure 7 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 3 and the generator 4, thereby improving driving efficiency.

[0061] In some embodiments, the first axle 1 is a front axle of the vehicle, and the second axle 2 is a rear axle of the vehicle.

[0062] In other words, refer to the attached Figure 1 As 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 5 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 wheels. In this way, the second motor 6 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 to rotate, realizing rear-wheel drive. When the first motor 5 and the second motor 6 are driven at the same time, four-wheel drive is realized.

[0063] In some embodiments, as Figure 1 As shown, the first transmission structure 7 includes a first input shaft 71, a second intermediate shaft 72 and a second transmission shaft 73. The first input shaft 71, the second intermediate shaft 72 and the second transmission shaft 73 are spaced apart and distributed in parallel along the lateral direction of the vehicle, that is, the left and right directions. The second intermediate shaft 72 is located between the first input shaft 71 and the second transmission shaft 73. In this way, the bottom space of the vehicle can be fully utilized to arrange the first transmission structure 7 to avoid interference between the various shafts. At the same time, the lateral arrangement also shortens the power transmission path from the second transmission shaft 73 to the front wheels 94, thereby improving the power transmission efficiency.

[0064] like Figure 1As shown, the first input shaft 71 is provided with a first input gear 711, the second intermediate shaft 72 is provided with a coaxially distributed third intermediate gear 721 and a fourth transmission gear 722, and the second transmission shaft 73 is provided with a first output gear 731. In other words, when the first input shaft 71 rotates, it drives the first input gear 711 to rotate synchronously, when the second intermediate shaft 72 rotates, it drives the third intermediate gear 721 and the fourth transmission gear 722 to rotate, and when the second transmission shaft 73 rotates, it drives the first output gear 731 to rotate.

[0065] Furthermore, the first input shaft 71 is connected to the first motor 5 , and the second transmission shaft 73 is connected to the first wheel axle 1 , the first input gear 711 is meshed with the third intermediate gear 721 , and the fourth transmission gear 722 is meshed with the first output gear 731 .

[0066] Specifically, if Figure 1 As shown, the motor shaft of the first motor 5 is connected to the first input shaft 71, the first input gear 711 is meshed with the third intermediate gear 721, and the fourth transmission gear 722 is meshed with the first output gear 731. Thus, the first motor 5 can provide power to drive the first input shaft 71 to rotate. When the first input shaft 71 rotates, it can drive the first input gear 711 to rotate. The first input gear 711, in turn, drives the third intermediate gear 721 meshed with it to rotate. When the third intermediate gear 721 rotates, it drives the second intermediate shaft 72 and the fourth transmission gear 722 to rotate. When the fourth transmission gear 722 rotates, it drives the first output gear 731 meshed with it, which in turn drives the second transmission shaft 73 to rotate, thereby achieving power transmission from the first motor 5 to the second transmission shaft 73.

[0067] In actual design, Figure 1 As shown, the second drive shaft 73 is power-connected to the first wheel axle 1 via the front drive shaft 92 and the front differential 91. That is, the power of the first drive shaft 832 can be transmitted to the front drive shaft 92 and the front differential 91, and then to the first wheel axle 1, thereby achieving power connection and power transmission from the second drive shaft 73 to the first wheel axle 1. The first transmission structure 7 can be disposed in the intermediate transfer case 96 to ensure stable transmission of the first transmission structure 7.

[0068] In some embodiments, there are multiple first input gears 711, that is, the number of first input gears 711 can be set to two, three, or even more. Providing multiple first input gears 711 allows the power of the first input shaft 71 to be transmitted to the second intermediate shaft 72 through the multiple first input gears 711, thereby improving the power transmission efficiency of the first input shaft 71. The multiple first input gears 711 are spaced apart along the axial direction of the first input shaft 71 to avoid interference between the first input gears 711, effectively utilize the axial space of the first input shaft 71, and enable each first input gear 711 to independently receive and transmit power.

[0069] There are multiple third intermediate gears 721, i.e., the number of third intermediate gears 721 can be two, three, or even more. Providing multiple third intermediate gears 721 allows the second intermediate shaft 72 to receive power from the first input shaft 71 through the multiple third intermediate gears 721 and transmit the power to the second transmission shaft 73, thereby improving the power transmission efficiency of the second intermediate shaft 72. The multiple third intermediate gears 721 mesh with the multiple first input gears 711 in a one-to-one correspondence, i.e., the number and position of the third intermediate gears 721 are the same as those of the first input gears 711. This allows each first input gear 711 to mesh with a third intermediate gear 721, forming multiple independent transmission paths. This improves both power transmission stability and efficiency, and prevents interference between the various transmission paths.

[0070] The third intermediate gears 721 are loosely mounted on the second intermediate shaft 72 and are adapted to be selectively fixed to the second intermediate shaft 72. That is, the third intermediate gears 721 can rotate freely on the second intermediate shaft 72 and can be selectively fixed to the second intermediate shaft 72 via the synchronizer S1.

[0071] Reference Attachment Figure 1 As shown, two first input gears 711 and two third intermediate gears 721 are provided. The two first input gears 711 and the two third intermediate gears 721 mesh with each other in a one-to-one correspondence. The two third intermediate gears 721 are loosely mounted on the outside of the second intermediate shaft 72. A synchronizer S1 is provided between the two third intermediate gears 721. The synchronizer S1 can be engaged with any of the third intermediate gears 721 to fix one of the third intermediate gears 721 to the second intermediate shaft 72, thereby adjusting the gear number and achieving gear shifting. The figure shows two first input gears 711 and two third intermediate gears 721, that is, the figure shows that the front axle has two gears. Other gear numbers can also be set according to actual needs.

[0072] The utility model also provides a vehicle.

[0073] The vehicle according to the embodiment of the present invention is provided with the power drive system 100 according to any one of the above embodiments.

[0074] Among them, the vehicle of this embodiment can be an off-road vehicle, a sedan, a pickup truck, an SUV, etc., and realizes pure electric two-wheel drive and extended-range two-wheel drive functions by adopting two motors, thereby realizing flexible and efficient vehicle drive. In the extended-range working condition, the range extender composed of the engine 3 and the generator 4 can provide additional electric energy for the vehicle. Compared with the traditional hybrid extended-range hybrid power system, the utility model highlights the pure electric driving function, reduces fuel consumption, and improves the fuel economy of the vehicle; through the second motor 6, the first half shaft 21 and the second half shaft 22 are selectively transmitted with power, which can better control the two rear wheels, improve the vehicle's controllability, and thus improve the vehicle's extreme handling stability and escape ability.

[0075] In some embodiments, the engine 3 and the generator 4 are installed in the nacelle.

[0076] Specifically, if Figure 1 As shown, the engine 3 and the generator 4 are arranged at the front of the vehicle. In this way, the engine 3 and the generator 4, i.e., the range extender, can be installed in the engine compartment to ensure the normal operation of the engine 3 and the generator 4 and reduce the impact on the surrounding environment, which is convenient for maintenance and operation. The arrangement is longitudinal, that is, the engine 3 and the generator 4 are arranged in sequence along the front and rear directions. The generator 4 is arranged close to the first motor 5, which is conducive to transmitting electrical energy to the first motor 5. Of course, in practice, since the range extender does not directly participate in the driving, the engine 3 and the generator 4 can also be installed horizontally in the engine compartment. They can be flexibly arranged according to the space of the entire vehicle and are not limited to the description in this embodiment.

[0077] In other embodiments, the first motor 5 and the first transmission structure 7 are located under the vehicle floor.

[0078] Specifically, if Figure 1 As shown, the first motor 5 and the first transmission structure 7 are roughly located in the middle of the vehicle. The first motor 5 and the first transmission structure 7 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 5 to directly drive the first wheel axle 1 through the first transmission structure 7.

[0079] In some embodiments, a differential lock may be provided on the front differential 91 , or no differential lock may be provided on the front differential 91 , and the configuration may be flexible according to the actual needs of the vehicle.

[0080] The following is the power transmission path of the power drive system 100 of the present invention under different operating conditions:

[0081] (1) In pure electric front-wheel drive mode, the first motor 5 is driven independently. The power of the first motor 5 is transmitted to the first wheel axle 1 through the first transmission structure 7, 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 combined with the differential lock can improve the low-speed off-road escape capability, and the high gear can ensure high speed while taking into account fuel economy.

[0082] (2) In the pure electric rear-wheel drive mode, the second motor 6 is driven independently, and the power of the second motor 6 is transmitted to the second wheel axle 2 through the second transmission structure 8, and then transmitted to the rear wheels to drive the vehicle. In the process of power transmission from the transmission gear set 83 to the first clutch 81 and the second clutch 82, the degree of compression of the two clutches can be adjusted to transmit different amounts of torque to the first half-shaft 21 and the second half-shaft 22, and then transmit different amounts of torque to the left rear wheel 951 and the right rear wheel 952, thereby realizing torque vector distribution of the two rear wheels and improving the vehicle's extreme operation and escape ability.

[0083] (3) In pure electric four-wheel drive operation, the first motor 5 and the second motor 6 are driven simultaneously, and their power is transmitted to the first wheel axle 1 and the first wheel axle 1 through the first transmission structure 7 and the second transmission structure 8 respectively, and then transmitted to the front wheel 94 and the rear wheel to drive the vehicle. The synchronizer S1 can be adjusted to select the appropriate gear according to the driving conditions.

[0084] (4) In the extended-range front-wheel drive operating condition, the range extender works, that is, the generator 4 generates electricity and transmits the electric energy to the first motor 5, and the first motor 5 drives. The subsequent driving method is the same as the pure electric front-wheel drive operating condition.

[0085] (2) In the extended-range rear-wheel drive operating condition, the range extender works, that is, the generator 4 generates electricity and transmits the electric energy to the second motor 6, which drives the second motor 6. The subsequent driving method is the same as the pure electric rear-wheel drive operating condition.

[0086] (3) In the extended-range four-wheel drive operating condition, the range extender works, that is, the generator 4 generates electricity and transmits the electric energy to the first motor 5 and the second motor 6. The first motor 5 and the second motor 6 are driven simultaneously, and the subsequent driving mode is the same as the pure electric four-wheel drive operating condition.

[0087] (7) During the braking energy recovery operation, the vehicle recovers braking energy through the first motor 5 and the second motor 6. That is, when the vehicle brakes, the first motor 5 and the second motor 6 can be used as generators 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.

[0088] (8) In the reversing state, the reversing function can be realized by controlling the reverse rotation of the first motor 5 or the second motor 6.

[0089] 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.

[0090] 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 from each other in the longitudinal 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, the second wheel axle includes a first half-shaft and a second half-shaft, the second motor is selectively connected to the first half-shaft and the second half-shaft through a second transmission structure, so as to drive at least one of the first half-shaft and the second half-shaft to rotate.

2. The power drive system according to claim 1, characterized in that: The second transmission structure includes a first clutch, a second clutch and a transmission gear set. The second motor is power-connected to the transmission gear set. The transmission gear set is selectively power-connected to the first half-shaft through the first clutch. The transmission gear set is selectively power-connected to the second half-shaft through the second clutch.

3. The power drive system according to claim 2, characterized in that: The transmission gear set includes a first intermediate shaft and a first transmission shaft, the second motor is provided with a first motor gear, the first intermediate shaft is provided with a first intermediate gear and a second intermediate gear, and the first transmission shaft is provided with a first transmission gear; Among them, the first motor gear is engaged with the first intermediate gear, the second intermediate gear is engaged with the first transmission gear, the first clutch is connected between one end of the first transmission shaft and the first half shaft, and the second clutch is connected between the other end of the first transmission shaft and the second half shaft.

4. The power drive system according to claim 1, characterized in that: The second transmission structure is located between the first half-shaft and the second half-shaft.

5. The power drive system according to claim 1, characterized in that: Along the longitudinal direction of the vehicle, the generator and the first motor are located between the first wheel axle and the second wheel axle; and / or, the second motor is located on a side of the second wheel axle away from the first wheel axle; And / or, the first motor and the first transmission structure are both located between the first wheel axle and the second wheel axle.

6. The power drive system according to any one of claims 1 to 5, characterized in that: 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.

7. The power drive system according to any one of claims 1 to 5, characterized in that: The first transmission structure includes a first input shaft, a second intermediate shaft and a second transmission shaft, the first input shaft is provided with a first input gear, the second intermediate shaft is provided with a coaxially distributed third intermediate gear and a fourth transmission gear, and the second transmission shaft is provided with a first output gear; The first input shaft is connected to the first motor power, the second transmission shaft is connected to the first wheel axle power, the first input gear is meshed with the third intermediate gear for transmission, and the fourth transmission gear is meshed with the first output gear for transmission.

8. The power drive system according to claim 7, characterized in that: There are a plurality of first input gears, and the plurality of first input gears are spaced apart and distributed along the axial direction of the first input shaft; There are a plurality of third intermediate gears, and the plurality of third intermediate gears mesh with the plurality of first input gears in a one-to-one correspondence. The plurality of third intermediate gears are loosely sleeved outside the second intermediate shaft and are suitable for being selectively fixed to the second intermediate shaft.

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 the generator are installed in the nacelle; And / or, the first motor and the first transmission structure are located under the vehicle floor.

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