Power driving system and vehicle

Abstract

The utility model discloses a power driving system and a vehicle, the power driving system comprises an engine and a generator, the engine is used for driving the generator to generate electricity; the first wheel axle and the second wheel axle are distributed at intervals in the longitudinal direction of the vehicle; the driving motor is in power connection with one of the first wheel axle and the second wheel axle through a first transmission structure so as to drive one of the first wheel axle and the second wheel axle to rotate. According to the power driving system, the pure electric two-wheel driving function is highlighted, the oil consumption is reduced, and the fuel economy, the power performance and the controllability 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 there is room for improvement. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a power drive system that highlights the pure electric two-wheel drive function, reduces fuel consumption, and improves the vehicle's fuel economy, power performance, and handling.

[0005] According to an embodiment of the present invention, the power drive system includes: an engine and a generator, the engine is used to drive the generator to generate electricity; 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; a drive motor, the drive motor is connected to one of the first wheel axle and the second wheel axle through a first transmission structure, so as to drive one of the first wheel axle and the second wheel axle to rotate.

[0006] According to the power drive system of the embodiment of the present invention, a drive motor is adopted to realize pure electric two-wheel drive and extended-range two-wheel drive functions, thereby realizing flexible and efficient vehicle drive. In pure electric working conditions, the vehicle can rely on the electric energy provided by the battery to drive the drive motor for short-distance driving; in extended-range working conditions, the range extender composed of the engine and the generator can provide additional electric energy for the vehicle to provide to the drive motor; compared with the traditional hybrid extended-range hybrid power system, the present invention highlights the pure electric two-wheel drive function, reduces fuel consumption, and improves the vehicle's fuel economy, power performance and handling.

[0007] According to the power drive system of some embodiments of the present invention, the engine is located above the first wheel axle and spaced apart from the second wheel axle, and the drive motor is power-connected to the first wheel axle via a first transmission structure.

[0008] According to the power drive system of some embodiments of the present invention, the engine is located above the first wheel axle and spaced apart from the second wheel axle, and the drive motor is power-connected to the second wheel axle via a first transmission structure.

[0009] According to the power drive system of some embodiments of the present invention, along the longitudinal direction of the vehicle, the drive 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, along the longitudinal direction of the vehicle, the generator and the drive motor are both located between the first wheel axle and the second wheel axle.

[0011] 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.

[0012] 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 first intermediate gear and a first transmission gear distributed coaxially, and the first transmission shaft is provided with a first output gear; wherein, the first input shaft is power-connected to the drive motor, and the first transmission shaft is power-connected to one of the first wheel axle and the second wheel axle, 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.

[0013] 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 first intermediate gears, and the multiple first intermediate gears are meshed with the multiple first input gears one-to-one, and the multiple first intermediate gears are loosely mounted outside the first intermediate shaft and are suitable for being selectively fixed to the first intermediate shaft.

[0014] The utility model also provides a vehicle.

[0015] 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.

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

[0020] 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 .

[0021] Reference numerals:

[0022] Power drive system 100,

[0023] Engine 1, generator 2, first wheel axle 3, second wheel axle 4, drive motor 5, 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,

[0024] Front differential 91, front drive shaft 92, rear differential 93, rear drive shaft 94, intermediate transfer case 95, front wheels 96, rear wheels 97, synchronizer S1. DETAILED DESCRIPTION

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] Reference below Figure 1 and 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 two-wheel drive function, reduces fuel consumption, and improves the fuel economy, power performance and controllability of the vehicle.

[0030] like Figure 1 and Figure 2 As shown, a power drive system 100 according to an embodiment of the present invention includes: an engine 1 , a generator 2 , a first wheel axle 3 , a second wheel axle 4 and a drive motor 5 .

[0031] The first wheel axle 3 and the second wheel axle 4 are used to connect the front and rear wheels and the vehicle body, so that the front and rear wheels 97 can rotate to propel the vehicle forward or backward, ensuring smooth travel of the vehicle. The first wheel axle 3 and the second wheel axle 4 are spaced apart in the longitudinal direction of the vehicle, that is, the first wheel axle 3 and the second wheel axle 4 are spaced apart in the front and rear direction of the vehicle by a certain distance, 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 3 is located at the front of the vehicle and connected to the front wheels 96 , and the second wheel axle 4 is located at the rear of the vehicle and connected to the rear wheels 97 .

[0032] The power drive system 100 also includes an engine 1 and a generator 2. The engine 1 is used to drive the generator 2 to generate electricity. Specifically, the engine 1 can serve as a power generation source, providing electrical energy for the entire power drive system 100. In other words, the generator 2 can transmit electrical energy to the drive motor 5 for use by the drive motor 5. The engine 1 and generator 2 can together form a range extender, generating electricity during range-extended operation. The engine 1 and generator 2 can be matched based on performance requirements to provide electrical energy when the vehicle battery is low or when additional power is needed. In actual designs, the engine 1 and generator 2 can be located in the engine compartment.

[0033] Furthermore, the driving motor 5 is connected to one of the first wheel axle 3 and the second wheel axle 4 through the first transmission structure 6 to drive one of the first wheel axle 3 and the second wheel axle 4 to rotate.

[0034] Specifically, the drive motor 5 can provide power to independently rotate the first wheel axle 3 or the second wheel axle 4, thereby enabling pure electric two-wheel drive when the range extender is off. When the range extender is operating, the electricity generated by the generator 2 can be transferred to the drive motor 5, enabling extended-range two-wheel drive. The drive motor 5 can transmit power to the first wheel axle 3 or the second wheel axle 4 via the first transmission structure 6, achieving power transmission from the drive motor 5 to the first wheel axle 3 or the second wheel axle 4. This allows the drive motor 5 to drive the first wheel axle 3 or the second wheel axle 4 to rotate, thereby driving the first wheel axle 3 and the second wheel axle 4 to rotate. In this way, the vehicle can be electrically driven by a single drive motor 5, reducing fuel consumption and reducing fuel consumption.

[0035] In practice, refer to the attached Figure 1 As shown, when the first wheel axle 3 is located at the front of the vehicle and the second wheel axle 4 is located at the rear of the vehicle, the first wheel axle 3 can be connected to the front wheel 96, and the second wheel axle 4 can be connected to the rear wheel 97, so that when the drive motor 5 is connected to the first wheel axle 3 by power, power can be transmitted to the first wheel axle 3 to drive the front wheel 96 to rotate, realizing front-wheel drive; when the drive motor 5 is connected to the second wheel axle 4 by power, power can be transmitted to the second wheel axle 4 to drive the rear wheel 97 to rotate, realizing rear-wheel drive.

[0036] It should be noted that the power drive system 100 of this embodiment has different operating conditions, namely, pure electric operating condition (pure electric front drive operating condition, pure electric rear drive operating condition), extended range operating condition (extended range front drive operating condition, extended range rear drive operating condition), brake energy recovery operating condition and reverse operating condition (controlling the reverse rotation of the drive motor 5). (1) In the pure electric operating condition, the drive motor 5 is driven independently, that is, the drive motor 5 is used alone to rotate the first wheel axle 3 or the second wheel axle 4 to achieve the pure electric front drive operating condition or the pure electric rear drive operating condition. In this operating condition, the range extender does not work, the engine 1 and the generator 2 are in the off state, and it is suitable for short-distance driving or when the battery is fully charged. (2) In the extended range mode, the range extender is started, and the engine 1 drives the generator 2 to generate electricity. The range extender can cooperate with the drive motor 5 to achieve the extended range front drive mode or the extended range rear drive mode. That is, the electric energy generated by the generator 2 can be directly provided to the drive motor 5 to drive the first wheel axle 3 or the second wheel axle 4 to rotate, or it can be stored in the battery, and then the battery supplies power to the drive motor 5, so that the drive motor 5 can drive one of the first wheel axle 3 and the second wheel axle 4 to rotate. In this mode, the engine 1 does not directly drive the wheel, but provides electric energy to the drive motor 5 through the generator 2. It is suitable for long-distance driving or when the battery power is insufficient and additional energy is needed. (3) In the braking energy recovery mode, the vehicle brakes and performs braking energy recovery through the drive motor 5. That is, when the vehicle brakes, the drive motor 5 can be used as a generator 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. (4) In the reverse mode, the reverse function can be achieved by controlling the reverse rotation of the drive motor 5.

[0037] Therefore, the power drive system 100 of the present invention realizes pure electric two-wheel drive and extended-range two-wheel drive functions by adopting a drive motor 5, thereby realizing flexible and efficient vehicle drive. In pure electric working conditions, the vehicle can rely on the electric energy provided by the battery to drive the drive motor 5 for short-distance driving; in extended-range working conditions, the range extender composed of the engine 1 and the generator 2 can provide additional electric energy to the vehicle and provide it to the drive motor 5; compared with the traditional hybrid extended-range hybrid power system, the present invention highlights the pure electric two-wheel drive function, reduces fuel consumption, and improves the vehicle's fuel economy, power performance and handling.

[0038] In some embodiments, the engine 1 is located above the first wheel axle 3 and spaced apart from the second wheel axle 4 , and the drive motor 5 is power-connected to the first wheel axle 3 via a first transmission structure 6 .

[0039] Specifically, refer to the attached Figure 1As shown, the engine 1 is located above the first wheel axle 3 and in front of the second wheel axle 4, that is, the engine 1 is arranged at the front of the vehicle and is arranged a certain distance away from the second wheel axle 4. In this way, the power transmission path from the range extender to the drive motor 5 can be shortened, and the power transmission efficiency can be improved. At the same time, the location of the engine 1 above the first wheel axle also reduces the space occupied by the engine 1 at the bottom of the vehicle, that is, more space is provided for the bottom of the vehicle, which is conducive to the arrangement of other structural components.

[0040] Among them, refer to the attached Figure 1 As shown, the drive motor 5 is arranged on the front side of the first transmission structure 6, so that the generator 2 is close to the drive motor 5, which is beneficial for the electric energy of the generator 2 to be transmitted to the drive motor 5, and the first transmission structure 6 can be arranged in the middle of the bottom of the vehicle, that is, between the first wheel axle 3 and the second wheel axle 4. In this way, the distance between the first transmission structure 6 and the first wheel axle 3 will not be too long, that is, the power transmission path from the first transmission structure 6 to the first wheel axle 3 is reduced, and the power transmission efficiency is improved, which is beneficial for the first transmission structure 6 to receive power from the drive motor 5 and transmit the power to the first wheel axle 3 so that the first wheel axle 3 can rotate. As shown in the figure, the first wheel axle 3 is connected to the front wheel 96 of the vehicle, so that when the first wheel axle 3 rotates, it can drive the front wheel 96 to rotate, thereby realizing the front drive function of the vehicle.

[0041] In some embodiments, the engine 1 is located above the first wheel axle 3 and spaced apart from the second wheel axle 4 , and the drive motor 5 is power-connected to the second wheel axle 4 via the first transmission structure 6 .

[0042] Specifically, refer to the attached Figure 2 As shown, the engine 1 is located above the first wheel axle and in front of the second wheel axle 4, that is, the engine 1 is arranged at the front of the vehicle and is arranged a certain distance away from the second wheel axle 4. In this way, the power transmission path from the range extender to the drive motor 5 can be shortened and the power transmission efficiency can be improved. At the same time, the location of the engine 1 above the first wheel axle also reduces the space occupied by the engine 1 at the bottom of the vehicle, that is, more space is provided for the bottom of the vehicle, which is conducive to the arrangement of other structural components.

[0043] Among them, refer to the attached Figure 1As shown, the drive motor 5 is arranged on the front side of the first transmission structure 6, so that the generator 2 is close to the drive motor 5, which is beneficial for the electric energy of the generator 2 to be transmitted to the drive motor 5, and the first transmission structure 6 can be arranged in the middle of the bottom of the vehicle, that is, between the first wheel axle 3 and the second wheel axle 4. In this way, the distance between the first transmission structure 6 and the second wheel axle 4 will not be too long, that is, the power transmission path from the first transmission structure 6 to the second wheel axle 4 is reduced, and the power transmission efficiency is improved, which is beneficial for the first transmission structure 6 to receive power from the drive motor 5 and transmit the power to the second wheel axle 4 so that the second wheel axle 4 can rotate. As shown in the figure, the second wheel axle 4 is connected to the rear wheel 97 of the vehicle, so that when the second wheel axle 4 rotates, it can drive the rear wheel 97 to rotate, thereby realizing the rear-wheel drive function of the vehicle.

[0044] In some embodiments, along the longitudinal direction of the vehicle, the drive motor 5 and the first transmission structure 6 are both located between the first wheel axle 3 and the second wheel axle 4 .

[0045] That is, the drive motor 5 and the first transmission structure 6 are located between the first wheel axle 3 and the second wheel axle 4 in the front-rear direction of the vehicle. Figure 1 As shown, the drive motor 5 and the first transmission structure 6 are located on the rear side of the first wheel axle 3 and the front side of the second wheel axle 4 .

[0046] 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 3 and the second wheel axle 4 of the vehicle, thereby improving the stability and balance of the vehicle. At the same time, the drive motor 5 and the first transmission structure 6 are integrated and arranged between the first wheel axle 3 and the second wheel axle 4, which can also reduce the energy loss during power transmission and is easier to cooperate with the range extender, namely the engine 1 and the generator 2, thereby improving the driving efficiency.

[0047] In some embodiments, the first axle 3 is the front axle of the vehicle, and the second axle 4 is the rear axle of the vehicle.

[0048] In other words, refer to the attached Figure 1 and attached Figure 2 As shown, the first wheel axle 3 is located at the front of the vehicle and is connected to the front wheel 96. In this way, the drive motor 5 can drive the first wheel axle 3, that is, the front wheel axle of the vehicle, to rotate, and then drive the two front wheels 96 to rotate, realizing front-wheel drive. The second wheel axle 4 is located at the rear of the vehicle and is connected to the rear wheel 97. In this way, the drive motor 5 can drive the second wheel axle 4, that is, the rear wheel axle of the vehicle, to rotate, and then drive the two rear wheels 97 to rotate, realizing rear-wheel drive.

[0049] In some embodiments, as Figure 1 and Figure 2As 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 lateral direction of the vehicle, i.e., the left and right directions, and extend laterally. 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 96 and the rear wheels 97, thereby improving the power transmission efficiency.

[0050] like Figure 1 and 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. In other words, when the first input shaft 61 rotates, it drives the first input gear 611 to rotate synchronously, when the first intermediate shaft 62 rotates, it drives the first intermediate gear 621 and the first transmission gear 622 to rotate, and when the first transmission shaft 63 rotates, it drives the first output gear 631 to rotate.

[0051] Furthermore, the first input shaft 61 is power-connected to the drive motor 5, and the first transmission shaft 63 is power-connected to one of the first wheel axle 3 and the second wheel axle 4, the first input gear 611 is meshed with the first intermediate gear 621 for transmission, and the first transmission gear 622 is meshed with the first output gear 631 for transmission.

[0052] Specifically, if Figure 1 and Figure 2 As shown, the motor shaft of the drive motor 5 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 drive motor 5 can provide power to drive the first input shaft 61 to rotate. When the first input shaft 61 rotates, it can drive the first input gear 611 to rotate. The first input gear 611, in turn, drives the first intermediate gear 621 meshed with it 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. When the first transmission gear 622 rotates, it can drive the first output gear 631 meshed with it, and then drive the first transmission shaft 63 to rotate, thereby achieving power transmission from the drive motor 5 to the first transmission shaft 63.

[0053] In actual design, refer to the attached Figure 1As shown, the first drive shaft 63 can be power-connected to the first wheel axle 3 through the front drive shaft 92 and the front differential 91, that is, the power of the first drive shaft 63 can be transmitted to the front drive shaft 92 and the front differential 91, and then transmitted to the first wheel axle 3, thereby realizing the power connection and power transmission from the first drive shaft 63 to the first wheel axle 3.

[0054] In addition, refer to the attached Figure 2 As shown, the first transmission shaft 63 can be power-connected to the second wheel axle 4 via the rear transmission shaft 94 and the rear differential 93. That is, the power of the first transmission shaft 63 can be transmitted to the rear transmission shaft 94 and the rear differential 93, and then to the second wheel axle 4, thereby achieving power connection and power transmission from the first transmission shaft 63 to the second wheel axle 4. The first transmission structure 6 can be disposed in an intermediate transfer case 95 to ensure stable transmission of the first transmission structure 6.

[0055] In some embodiments, there are multiple first input gears 611, that is, the number of first input gears 611 can be set to two, three, or even more. Providing multiple first input gears 611 allows the power of the first input shaft 61 to be transmitted to the first intermediate shaft 62 through the multiple first input gears 611, thereby improving the power transmission efficiency of the first input shaft 61. The multiple first input gears 611 are spaced apart along the axial direction of the first input shaft 61 to avoid interference between the first input gears 611, effectively utilize the axial space of the first input shaft 61, and enable each first input gear 611 to independently receive and transmit power.

[0056] There are multiple first intermediate gears 621, i.e., the number of first intermediate gears 621 can be two, three, or even more. Providing multiple first intermediate gears 621 allows the first intermediate shaft 62 to receive power from the first input shaft 61 through the multiple first intermediate gears 621 and transmit the power to the first transmission shaft 63, thereby improving the power transmission efficiency of the first intermediate shaft 62. The multiple first intermediate gears 621 mesh with the multiple first input gears 611 in a one-to-one correspondence, i.e., the number of first intermediate gears 621 and the position of the first input gears 611 are the same, and the positions correspond to each other. This allows each first input gear 611 to mesh with a first intermediate gear 621, forming multiple independent transmission paths. This improves both power transmission stability and transmission efficiency, and prevents interference between the various transmission paths.

[0057] Furthermore, multiple first intermediate gears 621 are loosely mounted outside the first intermediate shaft 62 and are suitable for being selectively fixed to the first intermediate shaft 62, that is, multiple first intermediate gears 621 can rotate freely on the first intermediate shaft 62, and can be selectively fixed to the first intermediate shaft 62 through the synchronizer S1.

[0058] Reference Attachment Figure 1 and attached Figure 2 As shown, two first input gears 611 and two first intermediate gears 621 are provided. The two first input gears 611 and the two first intermediate gears 621 mesh with each other in a one-to-one correspondence. The two first intermediate gears 621 are loosely mounted on the outside of the first intermediate shaft 62. A synchronizer S1 is provided between the two first intermediate gears 621. The synchronizer S1 can be engaged with any of the first intermediate gears 621 to fix one of the first intermediate gears 621 to the first intermediate shaft 62, thereby adjusting the number of gears and achieving gear shifting. The figure shows two first input gears 611 and two first intermediate gears 621, that is, the front and rear axles are shown as having two gears. Other gear numbers can also be set, and can be flexibly selected according to actual needs.

[0059] The utility model also provides a vehicle.

[0060] 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.

[0061] 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 a drive motor 5, thereby realizing flexible and efficient vehicle drive. In pure electric working conditions, the vehicle can rely on the electric energy provided by the battery to drive the drive motor 5 for short-distance travel; in extended-range working conditions, the range extender composed of the engine 1 and the generator 2 can provide additional electric energy to the vehicle and provide it to the drive motor 5; compared with the traditional hybrid extended-range hybrid power system, the utility model highlights the pure electric two-wheel drive function, reduces fuel consumption, and improves the vehicle's fuel economy, power performance and handling.

[0062] In some embodiments, the engine 1 and the generator 2 are installed in the nacelle.

[0063] Specifically, if Figure 1 and Figure 2 As shown, the engine 1 and the generator 2 are arranged at the front of the vehicle. In this way, the engine 1 and the generator 2, i.e., the range extender, can be installed in the engine compartment to ensure the normal operation of the engine 1 and the generator 2 and reduce the impact on the surrounding environment, which is convenient for maintenance and operation. The arrangement is longitudinal, that is, the engine 1 and the generator 2 are arranged in sequence along the front and rear directions, and the generator 2 is arranged close to the drive motor 5, which is conducive to transmitting electrical energy to the drive motor 5. Of course, in practice, since the range extender is not directly involved in the drive, the engine 1 and the generator 2 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.

[0064] In other embodiments, the drive motor 5 and the first transmission structure 6 are located under the vehicle floor.

[0065] Specifically, refer to the attached Figure 1 and attached Figure 2 As shown, the drive motor 5 and the first transmission structure 6 can be arranged to be located roughly in the middle of the vehicle, and the drive motor 5 and the first transmission structure 6 can be arranged under the vehicle floor. This is conducive to lowering the center of gravity of the vehicle and facilitates the power of the drive motor 5 to directly drive the first wheel axle 3 or the second wheel axle 4 through the first transmission structure 6.

[0066] In some embodiments, a differential lock may be provided on the front differential 91 or the rear differential 93 , or may be provided on both the front differential 91 and the rear differential 93 , and may be flexibly provided according to the actual needs of the vehicle.

[0067] The following is the power transmission path of the power drive system 100 of the present invention under different operating conditions:

[0068] (1) In pure electric front-wheel drive mode, the drive motor 5 is driven independently, and the power of the drive motor 5 is transmitted to the first wheel axle 3 through the first transmission structure 6, and then transmitted to the front wheel 96 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.

[0069] (2) In pure electric rear-wheel drive mode, the drive motor 5 is driven independently, and the power of the drive motor 5 is transmitted to the second wheel axle 4 through the first transmission structure 6, and then transmitted to the rear wheel 97 to drive the vehicle. The high speed gear or low speed gear can be selected through the synchronizer S1. The low speed gear can be combined with the differential lock to improve the low-speed off-road escape capability, and the high speed gear can ensure high speed while taking into account fuel economy.

[0070] (3) In the extended-range front-wheel drive operating condition, the range extender works, that is, the generator 2 generates electricity and transmits the electric energy to the drive motor 5, which drives the drive motor 5. The subsequent driving method is the same as the pure electric front-wheel drive operating condition.

[0071] (4) Extended-range rear-wheel drive mode: The range extender is working, that is, the generator 2 generates electricity and transmits the electrical energy to the drive motor 5, which drives the drive. The subsequent driving method is the same as the pure electric rear-wheel drive operating condition.

[0072] (5) During the braking energy recovery operation, the vehicle recovers braking energy through the drive motor 5. That is, when the vehicle brakes, the drive motor 5 can be used as a generator 2 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.

[0073] (6) In the reversing state, the reversing function can be realized by controlling the reverse rotation of the drive motor 5.

[0074] 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.

[0075] 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: An engine and a generator, wherein the engine is used to drive the generator to generate electricity; 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; A drive motor is connected to one of the first wheel axle and the second wheel axle through a first transmission structure, so as to drive one of the first wheel axle and the second wheel axle to rotate.

2. The power drive system according to claim 1, characterized in that: The engine is located above the first wheel axle and spaced apart from the second wheel axle, and the drive motor is connected to the first wheel axle through a first transmission structure.

3. The power drive system according to claim 1, characterized in that: The engine is located above the first wheel axle and spaced apart from the second wheel axle, and the drive motor is power-connected to the second wheel axle via a first transmission structure.

4. The power drive system according to claim 1, characterized in that: Along the longitudinal direction of the vehicle, the drive motor and the first transmission structure are both located between the first wheel axle and the second wheel axle.

5. The power drive system according to claim 1, characterized in that: Along the longitudinal direction of the vehicle, the generator and the drive motor 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 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; Among them, the first input shaft is connected to the driving motor power, and the first transmission shaft is connected to one of the first wheel axle and the second 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.

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 first intermediate gears, and the plurality of first intermediate gears mesh with the plurality of first input gears in a one-to-one correspondence. The plurality of first intermediate gears are loosely sleeved outside the first intermediate shaft and are suitable for being selectively fixed to the first 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 drive motor and the first transmission structure are located under the vehicle floor.

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