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; and the second motor is in power connection with the second wheel axle through a second transmission structure so as to drive the second wheel axle to rotate. According to the power driving system, the pure electric 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 driving function, reduces fuel consumption, and improves the fuel economy, power performance, and handling of the vehicle.

[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 through a first transmission structure for driving the first wheel axle to rotate; and a second motor, the second motor is connected to the second wheel axle through a second transmission structure for driving the second wheel axle 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 pure electric working conditions, the vehicle can rely on the electric energy provided by the battery to drive the first motor and the second 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; 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.

[0007] 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.

[0008] According to the power drive system of some embodiments of the present invention, along the longitudinal direction of the vehicle, the generator, the first motor and the second motor are all located between the first wheel axle and the second wheel axle; and / or, along the longitudinal direction of the vehicle, the first motor is located between the generator and the second motor.

[0009] 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.

[0010] 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 connected to the power of the first motor, and the first transmission shaft is connected to the power of the first 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.

[0011] 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.

[0012] According to the power drive system of some embodiments of the present invention, the second wheel axle includes a first wheel half-shaft and a second wheel half-shaft, a first differential is connected between the first wheel half-shaft and the second wheel half-shaft, and the first differential is provided with a differential gear; wherein, the second transmission structure includes a second input shaft and a second intermediate shaft, the second input shaft is provided with at least one second input gear, the second intermediate shaft is provided with a coaxially distributed second intermediate gear and at least one second output gear, the second input shaft is connected to the second motor power, the second output gear is meshed with the differential gear, at least one second intermediate gear is meshed with at least one second input gear in a one-to-one correspondence, and the second intermediate gear is loosely sleeved outside the second intermediate shaft and is suitable for being selectively fixed to the second intermediate shaft.

[0013] According to the power drive system of some embodiments of the present invention, the second wheel axle includes a first wheel half-shaft and a second wheel half-shaft, a first differential is connected between the first wheel half-shaft and the second wheel half-shaft, the first wheel half-shaft is provided with a first connecting gear, and the second wheel half-shaft is provided with a second connecting gear; wherein, the second transmission structure includes a second input shaft and a second intermediate shaft, the second input shaft is connected to the second motor power, the second input shaft is provided with a second input gear, the second intermediate shaft is provided with a coaxially distributed second intermediate gear and two second output gears, the second intermediate gear is meshed with the second input gear, the two second output gears are respectively meshed with the first connecting gear and the second connecting gear, and the second output gear is loosely sleeved outside the second intermediate shaft and is suitable for being selectively fixed to the second 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] 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.

[0017] 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.

[0018] 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

[0019] 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:

[0020] 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 ;

[0021] 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 .

[0022] Reference numerals:

[0023] Power drive system 100,

[0024] The first wheel axle 1, the first wheel half-axle 21, the first connecting gear 211, the second wheel half-axle 22, the second connecting gear 221,

[0025] Engine 3, generator 4, first motor 5, second motor 6,

[0026] First transmission structure 7, first input shaft 71, first input gear 711, first intermediate shaft 72, first intermediate gear 721, first transmission gear 722, first transmission shaft 73, first output gear 731,

[0027] The second transmission structure 8, the second input shaft 81, the second input gear 811, the second intermediate shaft 82, the second intermediate gear 821, the second output gear 822,

[0028] Second differential 91, front drive shaft 92, first differential 93, differential gear 931,

[0029] Front wheel 94, left rear wheel 951, right rear wheel 952, middle transfer case 97, rear reduction box 98,

[0030] Synchronizer S1, Synchronizer S2. DETAILED DESCRIPTION

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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 driving function, reduces fuel consumption, and improves the fuel economy, power performance and controllability of the vehicle.

[0036] like Figure 1 and 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, an engine 3, a generator 4, a first motor 5 and a second motor 6.

[0037] The first axle 1 and the second axle are used to connect the front and rear wheels to the vehicle body, enabling the front and rear wheels to rotate to propel the vehicle forward or backward, ensuring smooth travel. The first axle 1 and the second axle are spaced apart in the longitudinal direction of the vehicle. That is, the first axle 1 and the second axle are spaced a certain distance apart in the front-to-back direction of the vehicle, with one located at the front of the vehicle and the other located at the rear of the vehicle. For example, the first axle 1 is located at the front of the vehicle and connects to the front wheel 94, and the second axle is located at the rear of the vehicle and connects to the rear wheel.

[0038] 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.

[0039] The first motor 5 and the second motor 6 are electric drive devices, which can be driven individually to rotate the first wheel axle 1 or the second wheel axle, or can be driven simultaneously to rotate the first wheel axle and the second wheel axle.

[0040] 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 rotation of the first axle 1, which in turn drives the connected wheel. This enables electric propulsion of the vehicle, reducing fuel consumption and lowering fuel consumption.

[0041] The second motor 6 is power-connected to the second wheel axle via the second transmission structure 8 to drive the second wheel axle. Specifically, the second motor 6 transmits power to the second wheel axle via the second transmission structure 8, achieving power transmission from the second motor 6 to the second wheel axle. This allows the second motor 6 to rotate the second wheel axle, which in turn drives the connected wheel. This enables electric propulsion of the vehicle, further reducing fuel consumption and lowering fuel consumption.

[0042] 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), brake energy recovery operating conditions, and reverse operating conditions (controlling the first motor 5 or the second motor 6 to reverse). (1) In the pure electric operating condition, the first motor 5 and the second motor 6 are driven independently, that is, one motor can be driven alone to rotate the first wheel axle 1 or the second wheel axle to achieve the pure electric front-wheel drive operating condition or the pure electric rear-wheel drive operating condition, or the two motors can be driven simultaneously to rotate the first wheel axle 1 and the second wheel axle to achieve the pure electric four-wheel drive operating condition. In this operating condition, the range extender does not work, the engine 3 and the generator 4 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 3 drives the generator 4 to generate electricity. The range extender can be driven independently with any motor to realize the extended-range front-wheel drive mode or the extended-range rear-wheel drive mode, or it can be driven simultaneously with the first motor 5 and the second motor 6 to realize the extended-range four-wheel drive mode. That is, the electric energy generated by the generator 4 can be directly provided to the first motor 5 and the second motor 6 to drive the first wheel axle 1 and the second wheel axle to rotate, or it can be stored in the battery, and then the battery supplies power to the first motor 5 and the second motor 6, so that the first motor 5 and the second motor 6 can drive the first wheel axle 1 and the second wheel axle to rotate. In this mode, the engine 3 does not directly drive the wheels, but provides electric energy to the first motor 5 and the second motor 6 through the generator 4. It is suitable for long-distance driving or when the battery is insufficient and requires additional energy. (3) During the braking energy recovery mode, the first motor 5 and the second motor 6 recover braking energy when the vehicle brakes. 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 helps to extend the battery's range, improve the vehicle's energy efficiency, and reduce fuel consumption. (4) During the reversing mode, the reversing function can be achieved by controlling the reverse rotation of the first motor 5 or the second motor 6.

[0043] 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 two motors, 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 first motor 5 and the second motor 6 for short-distance driving; in extended-range working conditions, the range extender composed of the engine 3 and the generator 4 can provide additional electric energy for the vehicle; compared with traditional hybrid extended-range hybrid power systems, the present invention highlights the pure electric driving function, reduces fuel consumption, and improves the vehicle's fuel economy, power performance and handling.

[0044] In some embodiments, along the longitudinal direction of the vehicle, the first motor 5 and the first transmission structure 7 are both located between the first wheel axle 1 and the second wheel axle.

[0045] 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 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.

[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 1 and the second wheel axle 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, 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.

[0047] In some embodiments, the generator 4 , the first motor 5 , and the second motor 6 are all located between the first wheel axle 1 and the second wheel axle in the longitudinal direction of the vehicle.

[0048] That is, the generator 4, the first motor 5 and the second motor 6 are located between the first wheel axle 1 and the second wheel axle in the front-rear direction of the vehicle. Figure 1 and attached Figure 2 As shown, the generator 4 is located at the rear side of the first wheel axle 1 , the second motor 6 is located at the front side of the second wheel axle, and the first motor 5 is located between the generator 4 and the second motor 6 .

[0049] 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 and the two motors are arranged in the space between the two wheel axles, which can maximize the use of the bottom space of the vehicle to avoid interference with the operation of the generator 4 and the two motors by other components inside or outside the vehicle, thereby better adapting to different driving functions and power requirements, that is, the generator 4 can better cooperate with the first motor 5 and the second motor 6 to perform power transmission and improve the energy efficiency of the vehicle.

[0050] In other embodiments, the first motor 5 is located between the generator 4 and the second motor 6 in the longitudinal direction of the vehicle.

[0051] Specifically, if Figure 1 and Figure 2As shown, the generator 4, first motor 5, and second motor 6 are arranged sequentially along the vehicle's front-to-back direction, with the generator 4 located at the front and the second motor 6 at the rear. The first motor 5 is located between the generator 4 and the second motor 6, with a certain distance between them. This allows for better power transmission and distribution between the first motor 5, generator 4, and second motor 6, facilitating smooth delivery of power from the generator 4 to the first motor 5 and second motor 6, driving the first and second wheel axles 1 and 6.

[0052] In some embodiments, the first axle 1 is the front axle of the vehicle and the second axle is the rear axle of the vehicle.

[0053] In other words, refer to the attached Figure 1 and attached Figure 2 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 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, 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.

[0054] In some embodiments, as Figure 1 and Figure 2 As shown, the first transmission structure 7 includes a first input shaft 71, a first intermediate shaft 72 and a first transmission shaft 73. The first input shaft 71, the first intermediate shaft 72 and the first transmission shaft 73 are spaced apart and distributed in parallel along the lateral direction of the vehicle, i.e., the left and right directions. The first intermediate shaft 72 is located between the first input shaft 71 and the first 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 of the various shafts also shortens the power transmission path from the first transmission shaft 73 to the front wheels 94, thereby improving the power transmission efficiency.

[0055] like Figure 1 and Figure 2 As shown, the first input shaft 71 is provided with a first input gear 711, the first intermediate shaft 72 is provided with a coaxially distributed first intermediate gear 721 and a first transmission gear 722, and the first 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 first intermediate shaft 72 rotates, it drives the first intermediate gear 721 and the first transmission gear 722 to rotate, and when the first transmission shaft 73 rotates, it drives the first output gear 731 to rotate.

[0056] Furthermore, the first input shaft 71 is connected to the first motor 5 , and the first transmission shaft 73 is connected to the first wheel axle 1 , the first input gear 711 is meshed with the first intermediate gear 721 , and the first transmission gear 722 is meshed with the first output gear 731 .

[0057] Specifically, if Figure 1 and Figure 2 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 first intermediate gear 721, and the first 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 first intermediate gear 721 meshed with it to rotate. When the first intermediate gear 721 rotates, it drives the first intermediate shaft 72 and the first transmission gear 722 to rotate. When the first transmission gear 722 rotates, it drives the first output gear 731 meshed with it, which in turn drives the first transmission shaft 73 to rotate, thereby achieving power transmission from the first motor 5 to the first transmission shaft 73.

[0058] In actual design, Figure 1 and Figure 2 As shown, the first transmission shaft 73 can be power-connected to the first wheel axle 1 via the front transmission shaft 92 and the second differential 91. That is, the power of the first transmission shaft 73 can be transmitted to the front transmission shaft 92 and the second differential 91, and then to the first wheel axle 1, thereby achieving power connection and power transmission from the first transmission shaft 73 to the first wheel axle 1. The first transmission structure 7 can be disposed in the intermediate transfer case 97 to ensure stable transmission of the first transmission structure 7.

[0059] 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 first 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.

[0060] There are multiple first intermediate gears 721, i.e., the number of first intermediate gears 721 can be two, three, or even more. Providing multiple first intermediate gears 721 allows the first intermediate shaft 72 to receive power from the first input shaft 71 through the multiple first intermediate gears 721 and transmit the power to the first transmission shaft 73, thereby improving the power transmission efficiency of the first intermediate shaft 72. The multiple first intermediate gears 721 mesh with the multiple first input gears 711 in a one-to-one correspondence, i.e., the number of first intermediate gears 721 and the position of the first input gears 711 are the same, and each first input gear 711 meshes with a first intermediate gear 721, forming multiple independent transmission paths. This improves both power transmission stability and transmission efficiency, and prevents interference between the various transmission paths.

[0061] The plurality of first intermediate gears 721 are loosely mounted outside the first intermediate shaft 72 and are suitable for being selectively fixed to the first intermediate shaft 72 , that is, the plurality of first intermediate gears 721 can rotate freely on the first intermediate shaft 72 and can be selectively fixed to the first intermediate shaft 72 through the synchronizer S1 .

[0062] Reference Attachment Figure 1 As shown, two first input gears 711 and two first intermediate gears 721 are provided. The two first input gears 711 and the two first intermediate gears 721 mesh with each other in a one-to-one correspondence. The two first intermediate gears 721 are loosely mounted on the outside of the first intermediate shaft 72. A synchronizer S1 is provided between the two first intermediate gears 721. The synchronizer S1 can be engaged with any of the first intermediate gears 721 to fix one of the first intermediate gears 721 to the first intermediate shaft 72, thereby adjusting the number of gears and achieving gear shifting. The figure shows two first intermediate gears 721 and two first input gears 711, that is, the figure shows that the front axle has two gears. Other gear numbers can also be set and can be flexibly selected according to actual needs.

[0063] In some embodiments, the second wheel axle includes a first wheel half-shaft 21 and a second wheel half-shaft 22 . A first differential 93 is connected between the first wheel half-shaft 21 and the second wheel half-shaft 22 . The first differential 93 is provided with a differential gear 931 .

[0064] Specifically, if Figure 1As shown, the first wheel half-shaft 21 is the left rear wheel half-shaft of the vehicle, which is connected to the left rear wheel 951 of the vehicle to drive the left rear wheel 952 to rotate. The second wheel half-shaft 22 is the right rear wheel half-shaft of the vehicle, which is connected to the right rear wheel 952 of the vehicle to drive the right rear wheel 952 to rotate. A first differential 93 is connected between the first wheel half-shaft 21 and the second wheel half-shaft 22. The first differential 93 can realize a differential effect, that is, the left and right rear wheel half-shafts rotate at different speeds, so that the two left and right rear wheels rotate at different speeds, meeting the differential requirements when the vehicle turns and improving the vehicle's passability and stability.

[0065] In actual design, the second transmission structure 88 and the first differential 93 can be provided together in the rear reduction gearbox 98 to ensure stable transmission of the second transmission structure 88 .

[0066] Further, where Figure 1 As shown, the second transmission structure 8 includes a second input shaft 81 and a second intermediate shaft 82. The second input shaft 81 and the second intermediate shaft 82 are distributed in sequence along the longitudinal direction of the vehicle, i.e., the front-to-rear direction. The second input shaft 81 is located on the front side, and the second intermediate shaft 82 is located on the rear side, so as to further make full use of the bottom space of the vehicle to arrange the second transmission structure 8, improve space utilization, shorten the power transmission path from the second transmission structure 8 to the rear wheels, and thus improve power transmission efficiency.

[0067] The second input shaft 81 is provided with at least one second input gear 811 , that is, the second input shaft 81 can be provided with one, two, three or even more second input gears. Figure 1 In the description, two second input gears 811 are used as an example. The second intermediate shaft 82 is provided with coaxially distributed second intermediate gears 821 and at least one second output gear 822. That is, the second output gears 822 can be provided as one, two, three or even more. Figure 1 The two second output gears 822 are used as an example for explanation. Thus, when the second input shaft 81 rotates, it can drive the second input gear 811 to rotate synchronously. When the second intermediate shaft 82 rotates, it can drive the second intermediate gear 821 and the second output gear 822 to rotate.

[0068] Furthermore, the second input shaft 81 is connected to the power of the second motor 6, the second output gear 822 is engaged with the differential gear 931, at least one second intermediate gear 821 is engaged with at least one second input gear 811 in a one-to-one correspondence, and the second intermediate gear 821 is loosely mounted outside the second intermediate shaft 82 and is suitable for being selectively fixed to the second intermediate shaft 82.

[0069] Specifically, if Figure 1As shown, the motor shaft of the second motor 6 is connected to the second input shaft 81, and the second output gear 822 is meshed with the differential gear 931. Thus, the second motor 6 can provide power to drive the second input shaft 81 to rotate. When the second input shaft 81 rotates, it can drive the second input gear 811 to rotate. When the second input gear 811 rotates, it can drive the second intermediate gear 821 meshed with it to rotate, and then drive the second intermediate shaft 82 and the second output gear 822 to rotate, realizing power transmission from the second motor 6 to the second intermediate shaft 82. Then, when the second output gear 822 rotates, it can drive the differential gear 931 to rotate, thereby transmitting power to the first differential 93, thereby realizing differential action.

[0070] And at least one second intermediate gear 821 is meshed with at least one second input gear 811 in a one-to-one correspondence, that is, the number of second intermediate gears 821 and the second input gears 811 are the same and the positions correspond to each other, so that each second input gear 811 can be meshed with a second intermediate gear 821, forming multiple independent transmission paths, which not only improves the stability of power transmission, but also improves the transmission efficiency, and the various transmission paths do not interfere with each other. Among them, setting up multiple second input gears 811 can enable the power of the second input shaft 81 to be transmitted to the second intermediate shaft 82 through the multiple second input gears 811, thereby improving the power transmission efficiency of the second input shaft 81, and the multiple second input gears 811 are distributed at intervals along the axial direction of the second input shaft 81 to avoid interference between the respective second input gears 811, and reasonably utilize the axial space of the second input shaft 81 so that each second input gear 811 can independently receive and transmit power; setting up multiple second intermediate gears 821 can enable the second intermediate shaft 82 to receive power from the second input shaft 81 through the multiple second intermediate gears 821, and transmit the power to the first differential 93 and the second wheel axle, thereby improving the power transmission efficiency of the second intermediate shaft 82.

[0071] The second intermediate gears 821 are loosely mounted outside the second intermediate shaft 82 and are suitable for being selectively fixed to the second intermediate shaft 82, that is, multiple second intermediate gears 821 can rotate freely on the second intermediate shaft 82, and can be selectively fixed to the second intermediate shaft 82 through the synchronizer S2.

[0072] Reference Attachment Figure 1As shown, two second input gears 811 and two second intermediate gears 821 are provided. The two second input gears 811 and the two second intermediate gears 821 are meshed with each other in a one-to-one correspondence. The two second intermediate gears 821 are loosely sleeved outside the second intermediate shaft 82, and a synchronizer S2 is provided between the two second intermediate gears 821. The synchronizer S2 can be arbitrarily combined with one of the second intermediate gears 821 to fix one of the second intermediate gears 821 to the second intermediate shaft 82, thereby adjusting the number of gears and realizing gear shifting. Figure 1 As shown in FIG, two second input gears 811 and two second intermediate gears 821 are Figure 1 The rear bridge is shown in two gears for illustration purposes only, and can also be set to other gears, which can be flexibly selected according to actual needs.

[0073] In some embodiments, the second wheel axle includes a first wheel half-shaft 21 and a second wheel half-shaft 22, a first differential 93 is connected between the first wheel half-shaft 21 and the second wheel half-shaft 22, the first wheel half-shaft 21 is provided with a first connecting gear 211, and the second wheel half-shaft 22 is provided with a second connecting gear 221.

[0074] Specifically, if Figure 2 As shown, the first wheel axle 21 is the left rear wheel axle of the vehicle, which is connected to the left rear wheel 951 of the vehicle to drive the left rear wheel 951 to rotate. The second wheel axle 22 is the right rear wheel axle of the vehicle, which is connected to the right rear wheel 952 of the vehicle to drive the right rear wheel 952 to rotate. A first differential 93 is connected between the first wheel axle 21 and the second wheel axle 22. The first differential 93 can achieve a differential effect, that is, the left and right rear wheel axles rotate at different speeds, thereby causing the two left and right rear wheels to rotate at different speeds, meeting the differential speed requirements when the vehicle turns and improving the vehicle's passability and stability. Among them, the first wheel axle 21 is provided with a first connecting gear 211, that is, the first connecting gear 211 can transfer power to the first wheel axle 21 to drive the first wheel axle 21 to rotate. The second wheel axle 22 is provided with a second connecting gear 221, that is, the second connecting gear 221 can transfer power to the second wheel axle 22 to drive the second wheel axle 22 to rotate.

[0075] In actual design, the second transmission structure 88 and the first differential 93 can be provided together in the rear reduction gearbox 98 to ensure stable transmission of the second transmission structure 88 .

[0076] Further, where Figure 2As shown, the second transmission structure 8 includes a second input shaft 81 and a second intermediate shaft 82. The second input shaft 81 and the second intermediate shaft 82 are distributed in sequence along the longitudinal direction of the vehicle, i.e., the front-to-rear direction. The second input shaft 81 is located on the rear side, and the second intermediate shaft 82 is located on the front side, so as to further make full use of the bottom space of the vehicle to arrange the second transmission structure 8, improve space utilization, shorten the power transmission path from the second transmission structure 8 to the rear wheels, and thus improve power transmission efficiency.

[0077] like Figure 2 As shown, the motor shaft of the second motor 6 is connected to the second input shaft 81, that is, the second input shaft 81 is power-connected to the second motor 6. The second input shaft 81 is provided with a second input gear 811, and the second intermediate shaft 82 is provided with a coaxially distributed second intermediate gear 821 and two second output gears 822. The second intermediate gear 821 meshes with the second input gear 811, and the two second output gears 822 respectively mesh with the first connecting gear 211 and the second connecting gear 221. Thus, the second motor 6 can provide power to drive the second input shaft 81 to rotate. When the second input shaft 81 rotates, it can drive the second input gear 811 to rotate. When the second input gear 811 rotates, it can drive the second intermediate gear 821 meshed with it, which in turn drives the second intermediate shaft 82 and the two second output gears 822 to rotate, achieving power transmission from the second motor 6 to the second intermediate shaft 82. Then, when the two second output gears 822 rotate, they can respectively drive the two first connecting gears 211 and the second connecting gear 221 to rotate, thereby transmitting power to the first differential 93, thereby achieving differential action.

[0078] The second output gear 822 is loosely sleeved outside the second intermediate shaft 82 and is suitable for being selectively fixed to the second intermediate shaft 82. That is, the second intermediate gear 821 can rotate freely on the second intermediate shaft 82, and the second intermediate gear 821 can be selectively fixed to the second intermediate shaft 82 through the synchronizer S2. Figure 2 As shown, a second output gear 822 is provided, and the two second output gears 822 are loosely sleeved outside the second intermediate shaft 82, and a synchronizer S2 is provided between the two second output gears 822. The synchronizer S2 can be arbitrarily combined with one of the second output gears 822 to fix one of the second output gears 822 to the second intermediate shaft 82, thereby adjusting the gear number and realizing gear shifting. Figure 2 As shown in FIG, two second output gears 822 are respectively engaged with the first connecting gear 211 and the second connecting gear 221, that is, Figure 2 The rear bridge is shown in two gears for illustration purposes only, and can also be set to other gears, which can be flexibly selected according to actual needs.

[0079] The utility model also provides a vehicle.

[0080] 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.

[0081] Among them, the vehicle of this embodiment can be an off-road vehicle, a sedan, a pickup truck, an SUV, etc., and realizes the 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 pure electric working condition, the vehicle can rely on the electric energy provided by the battery to drive the first motor 5 and the second motor 6 for short-distance 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 utility model highlights the pure electric driving function, reduces fuel consumption, and improves the vehicle's fuel economy, power performance and handling.

[0082] In some embodiments, the engine 3 and the generator 4 are installed in the nacelle.

[0083] 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.

[0084] In other embodiments, the first motor 5 and the first transmission structure 7 are located under the vehicle floor.

[0085] 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.

[0086] In some embodiments, a differential lock may be provided on the second differential 91 or the first differential 93 , or may be provided on both the second differential 91 and the first differential 93 , and may be flexibly provided according to the actual needs of the vehicle.

[0087] The following is the power transmission path of the power drive system 100 of the present invention under different operating conditions:

[0088] (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.

[0089] (2) In 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 wheel 95 to drive the vehicle. The high gear or low gear can be selected through the synchronizer S2. 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.

[0090] (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 wheels 94 and the rear wheels 95 to drive the vehicle. The synchronizer S1 and the synchronizer S2 can be adjusted to select the appropriate gear according to the driving conditions.

[0091] (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.

[0092] (5) 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.

[0093] (6) 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.

[0094] (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.

[0095] (8) In the reversing state, the reversing function can be achieved by controlling the reverse rotation of the first motor 5 or the second motor 6.

[0096] 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.

[0097] 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; A second motor is connected to the second wheel axle through a second transmission structure to drive the second wheel axle to rotate.

2. The power drive system according to claim 1, 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.

3. The power drive system according to claim 1, characterized in that: In the longitudinal direction of the vehicle, the generator, the first motor and the second motor are all located between the first wheel axle and the second wheel axle; And / or, along the longitudinal direction of the vehicle, the first motor is located between the generator and the second motor.

4. The power drive system according to any one of claims 1 to 3, 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.

5. The power drive system according to any one of claims 1 to 3, 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.

6. The power drive system according to claim 5, 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.

7. The power drive system according to any one of claims 1 to 3, characterized in that: The second wheel axle includes a first wheel half-shaft and a second wheel half-shaft, a first differential is connected between the first wheel half-shaft and the second wheel half-shaft, and the first differential is provided with a differential gear; Among them, the second transmission structure includes a second input shaft and a second intermediate shaft, the second input shaft is provided with at least one second input gear, the second intermediate shaft is provided with a coaxially distributed second intermediate gear and at least one second output gear, the second input shaft is connected to the second motor power, the second output gear is engaged with the differential gear, at least one second intermediate gear is engaged with at least one second input gear in a one-to-one correspondence, and the second intermediate gear is loosely mounted outside the second intermediate shaft and is suitable for being selectively fixed to the second intermediate shaft.

8. The power drive system according to any one of claims 1 to 3, characterized in that: The second wheel axle includes a first wheel half-shaft and a second wheel half-shaft, a first differential is connected between the first wheel half-shaft and the second wheel half-shaft, the first wheel half-shaft is provided with a first connecting gear, and the second wheel half-shaft is provided with a second connecting gear; Among them, the second transmission structure includes a second input shaft and a second intermediate shaft, the second input shaft is connected to the power of the second motor, the second input shaft is provided with a second input gear, the second intermediate shaft is provided with a coaxially distributed second intermediate gear and two second output gears, the second intermediate gear is engaged with the second input gear, the two second output gears are respectively engaged with the first connecting gear and the second connecting gear, and the second output gear is loosely sleeved outside the second intermediate shaft and is 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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