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 which 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 transmission structure so as to drive one of the first wheel axle and the second wheel axle to rotate, and the driving motor is selectively in power connection with the other one of the first wheel axle and the second wheel axle through the transmission structure; and the rotating shaft is used for selectively driving the other one of the first wheel shaft and the second wheel shaft to rotate. According to the power driving system provided by the embodiment of the utility model, the switching between a two-wheel driving working condition and a four-wheel driving working condition can be realized through one motor, the flexible and efficient vehicle driving is realized, and the fuel economy, the power performance and the controllability of the vehicle are improved; meanwhile, the overall axial size of the bridge is shortened, the setting cost is reduced, the vehicle weight is improved, the endurance mileage is increased, the vehicle use scene is enriched, the use effect is better, and the application range is wider.

Description

Technical Field

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

[0002] With the continuous penetration of new energy technologies, more and more automakers are developing their own new energy strategies. Traditional ICE powertrains in vehicles suffer from high fuel consumption due to their large-displacement engines, making it difficult to meet future fuel consumption regulations. Consequently, various automakers are exploring new energy technology strategies for their vehicles. Currently, there are three main categories of new energy vehicles on the market: the first is based on traditional powertrains with minimal modifications, adopting a P2 architecture; the second is a pure electric EV architecture, often employing high-power three or four motors; and the third is a hybrid architecture, either extended-range or parallel-parallel. Existing extended-range hybrid architectures suffer from high fuel consumption, a large electric axle axial dimension, and the need for multiple motors to achieve four-wheel drive operation. This results in high setup costs, impacts vehicle lightweighting, and, consequently, affects range, leaving room for improvement. Utility Model Content

[0003] This utility model aims to solve at least one of the technical problems existing in the prior art. To this end, it proposes a power drive system that emphasizes pure electric driving, reduces fuel consumption, and improves the vehicle's fuel economy, power performance, and maneuverability. It also shortens the overall axial dimension of the electric bridge, increases vehicle weight, improves range, and enriches vehicle usage scenarios.

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

[0005] According to the power drive system of the embodiment of the present invention, the drive motor drives one of the first wheel axle and the second wheel axle to rotate, and the drive motor selectively drives the other of the first wheel axle and the second wheel axle to rotate, so that the switching between the two-wheel drive condition and the four-wheel drive condition can be realized by one motor, thereby realizing flexible and efficient vehicle drive. Compared with the traditional hybrid-range extended-range hybrid system, the present invention highlights the pure electric driving function, reduces fuel consumption, and improves the vehicle's fuel economy, power performance and handling; at the same time, it shortens the overall axial dimension of the electric bridge, reduces the setting cost, increases the lightweight of the vehicle, improves the cruising range, and enriches the vehicle's use scenarios, with better use effects and a wider range of applications.

[0006] According to the power drive system of some embodiments of the present utility model, the transmission structure is provided with a limited slip differential;

[0007] The transmission structure is selectively connected to the second wheel axle in power through the limited slip differential, or the transmission structure is selectively connected to the first wheel axle in power through the limited slip differential.

[0008] According to some embodiments of the present invention, the power drive system further includes: a first transmission shaft and a second transmission shaft, wherein the first transmission shaft is connected between the first wheel axle and the transmission structure, and the second transmission shaft is connected between the second wheel axle and the transmission structure.

[0009] According to the power drive system of some embodiments of the present invention, the first wheel axle includes a first half-shaft and a second half-shaft, a first differential is connected between the first half-shaft and the second half-shaft, and the first transmission shaft is power-connected to the first differential;

[0010] The second wheel axle includes a third half-shaft and a fourth half-shaft, a second differential is connected between the third half-shaft and the fourth half-shaft, and the second transmission shaft is power-connected to the second differential.

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

[0012] According to the power drive system of some embodiments of the present invention, there are multiple active input gears and multiple intermediate transmission gears, and the multiple active input gears are matched with the multiple intermediate transmission gears in a one-to-one correspondence.

[0013] According to the power drive system of some embodiments of the present invention, the limited slip differential is selectively connected between the transmission input gear and the first transmission shaft;

[0014] Alternatively, the limited slip differential is selectively connected between the intermediate transmission shaft and the second transmission shaft.

[0015] According to the power drive system of some embodiments of the present invention, along the longitudinal direction of the vehicle, the drive motor, the transmission structure, the first transmission shaft and the second transmission shaft are all located between the first wheel axle and the second wheel axle;

[0016] And / or, the first wheel axle is the front wheel axle of the vehicle, and the second wheel axle is the rear wheel axle of the vehicle.

[0017] The utility model also provides a vehicle.

[0018] The vehicle according to the embodiment of the present invention is provided with any one of the power drive systems described above.

[0019] According to some embodiments of the vehicle of the present invention, the engine and the generator are installed in the cabin; and / or the drive motor and the transmission structure are located under the vehicle floor.

[0020] The advantages of the vehicle and the power drive system compared to the prior art are the same and will not be described in detail here.

[0021] 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

[0022] 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:

[0023] Figure 1 This is a schematic diagram of the principle of the power drive system according to an embodiment of the present utility model. Figure 1 ;

[0024] 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 .

[0025] Reference numerals:

[0026] Power drive system 100,

[0027] First wheel axle 1, first half axle 11, second half axle 12, second wheel axle 2, third half axle 21, fourth half axle 22,

[0028] Driving motor 3, motor shaft 31, active input gear 311, first transmission shaft 4, transmission input gear 41, second transmission shaft 5,

[0029] Transmission structure 6, intermediate transmission shaft 61, intermediate transmission gear 611, intermediate output gear 612,

[0030] First differential 91 , second differential 92 , limited slip differential 93 , front wheels 94 , rear wheels 95 , intermediate transfer case 96 , generator 97 , engine 98 , synchronizer S1 . 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-Figure 2 A power drive system 100 according to an embodiment of the present invention is described. The power drive system 100 highlights the pure electric driving function, reduces fuel consumption, and improves the vehicle's fuel economy, power performance and handling; at the same time, it shortens the overall axial size of the electric bridge, increases the vehicle's lightweight, improves the cruising range, and enriches the vehicle's usage scenarios.

[0036] like Figure 1-Figure 2 As shown, a power drive system 100 according to an embodiment of the present invention includes: a first wheel axle 1 , a second wheel axle 2 , an engine 98 , a generator 97 and a drive motor 3 .

[0037] The first wheel axle 1 and the second wheel axle 2 are used to connect the front and rear wheels to the vehicle body, so that the front and rear wheels can rotate to propel the vehicle forward or backward, ensuring smooth driving of the vehicle. The first wheel axle 1 and the second wheel axle 2 are spaced apart along the longitudinal direction of the vehicle, that is, the first wheel axle 1 and the second wheel axle 2 are spaced apart a certain distance along the front and rear direction of the vehicle, one is located at the front of the vehicle and the other is located at the rear of the vehicle, such as Figure 1-Figure 2 As shown, in this embodiment, the first wheel axle 1 is located at the front of the vehicle, and two front wheels 94 are connected at both ends. The second wheel axle 2 is located at the rear of the vehicle, and two rear wheels 95 are connected at both ends.

[0038] Power drive system 100 also includes an engine 98 and a generator 97. Engine 98 is used to drive generator 97 to generate electricity. That is, engine 98 can serve as a power generation source, providing electrical energy for the entire power drive system 100. Engine 98 and generator 97 can together constitute a range extender, generating electricity during range extension. Engine 98 and generator 97 can be matched according to performance requirements to provide electricity when the vehicle battery is low or additional power is needed. In actual design, engine 98 and generator 97 can be located in the engine compartment.

[0039] The drive motor 3 is an electric drive device, which is connected to one of the first wheel axle 1 and the second wheel axle 2 through a transmission structure 6 for driving one of the first wheel axle 1 and the second wheel axle 2 to rotate, and the drive motor 3 is selectively connected to the other of the first wheel axle 1 and the second wheel axle 2 through a transmission structure 6 for selectively driving the other of the first wheel axle 1 and the second wheel axle 2 to rotate.

[0040] Specifically, the drive motor 3 is power-connected to one of the first wheel axle 1 and the second wheel axle 2 via the transmission structure 6 to drive one of the first wheel axle 1 and the second wheel axle 2 to rotate. That is, the drive motor 3 can be power-connected to the first wheel axle 1 via the transmission structure 6 to achieve power transmission from the drive motor 3 to the first wheel axle 1, so that the drive motor 3 can drive the first wheel axle 1 to rotate, and the first wheel axle 1 can drive the wheel connected thereto to rotate. The drive motor 3 can also be power-connected to the second wheel axle 2 via the transmission structure 6 to achieve power transmission from the drive motor 3 to the second wheel axle 2, so that the drive motor 3 can drive the second wheel axle 2 to rotate, and the second wheel axle 2 can drive the wheel connected thereto to rotate.

[0041] Furthermore, the drive motor 3 is selectively power-connected to the other of the first wheel axle 1 and the second wheel axle 2 through the transmission structure 6, so as to selectively drive the other of the first wheel axle 1 and the second wheel axle 2 to rotate, that is, when the drive motor 3 is power-connected to the first wheel axle 1 through the transmission structure 6, the drive motor 3 can be selectively power-connected to the second wheel axle 2 through the transmission structure 6, so that the drive motor 3 can be power-connected to the second wheel axle 2 through the transmission structure 6, so that the second wheel axle 2 can drive the wheel connected thereto to rotate, thereby realizing the four-wheel drive working condition of the vehicle, and the drive motor 3 can also be power-disconnected to the second wheel axle 2, thereby realizing the two-wheel drive working condition of the vehicle.

[0042] And when the drive motor 3 is power-connected to the second wheel axle 2 through the transmission structure 6, the drive motor 3 can be selectively power-connected to the first wheel axle 1 through the transmission structure 6, so that the drive motor 3 can be power-connected to the first wheel axle 1 through the transmission structure 6, so that the first wheel axle 1 can drive the wheel connected to it to rotate, thereby realizing the four-wheel drive working condition of the vehicle, and the drive motor 3 can also be power-disconnected to the first wheel axle 1, thereby realizing the two-wheel drive working condition of the vehicle.

[0043] In this way, the vehicle can be electrically driven, further reducing the use of fuel and reducing fuel consumption. The entire vehicle only needs to be driven by one drive motor 3, which can reduce the installation cost, increase the lightweight of the vehicle, and thus increase the cruising range and enrich the vehicle usage scenarios. In addition, setting up one drive motor 3 can reduce the occupied space, thereby shortening the overall axial size of the electric bridge.

[0044] Among them, it should be noted that the power drive system 100 of this embodiment has different operating conditions, including pure electric operating conditions (pure electric front-wheel drive operating conditions, pure electric rear-wheel drive operating conditions and pure electric four-wheel drive operating conditions), extended-range operating conditions (extended-range front-wheel drive operating conditions, extended-range rear-wheel drive operating conditions and extended-range four-wheel drive operating conditions), braking energy recovery operating conditions and reversing operating conditions (controlling the reverse rotation of the drive motor 3).

[0045] (1) In the pure electric mode, the drive motor 3 is driven, so that the drive motor 3 is connected to one of the first wheel axle 1 and the second wheel axle 2 by power, and the drive motor 3 is disconnected from the other of the first wheel axle 1 and the second wheel axle 2 by power, so as to realize the pure electric front-wheel drive mode or the pure electric rear-wheel drive mode. The drive motor 3 can also be connected to both the first wheel axle 1 and the second wheel axle 2 by power, so as to realize the pure electric four-wheel drive mode. In this mode, the range extender does not work, and the engine 98 and the generator 97 are in the off state, which is suitable for short-distance driving or when the battery is fully charged.

[0046] (2) In the extended-range operating condition, the range extender is started, the engine 98 drives the generator 97 to generate electricity, and the range extender can cooperate with the drive motor 3 to drive to achieve the extended-range front-wheel drive operating condition, the extended-range rear-wheel drive operating condition or the extended-range four-wheel drive operating condition.

[0047] That is to say, the electric energy generated by the generator 97 can be directly provided to the drive motor 3 to drive the first wheel axle 1 and the second wheel axle 2 to rotate, or it can be stored in the battery, and then the battery powers the drive motor 3, so that the drive motor 3 can drive the first wheel axle 1 and the second wheel axle 2 to rotate. In this operating condition, the engine 98 does not directly drive the wheels, but provides electric energy to the drive motor 3 through the generator 97, which is suitable for long-distance driving or when the battery is insufficient and additional energy is required.

[0048] (3) In the braking energy recovery mode, the driving motor 3 recovers braking energy when the vehicle brakes. That is, when the vehicle brakes, the driving motor 3 can be used as a generator 97 to convert the vehicle's kinetic energy into electrical energy and store it in the battery, which is beneficial to extend the battery's cruising range, improve the vehicle's energy efficiency, and reduce fuel consumption.

[0049] (4) In the reversing state, the reversing function can be achieved by controlling the drive motor 3 to reverse.

[0050] According to the power drive system 100 of the embodiment of the present invention, the drive motor 3 is used to drive one of the first wheel axle 1 and the second wheel axle 2 to rotate, and the drive motor 3 is used to selectively drive the other of the first wheel axle 1 and the second wheel axle 2 to rotate, so that the switching between the two-wheel drive condition and the four-wheel drive condition can be realized by one motor, thereby realizing flexible and efficient vehicle drive. Compared with the traditional hybrid-range extended-range hybrid system, the present invention highlights the pure electric driving function, reduces fuel consumption, and improves the vehicle's fuel economy, power performance and handling; at the same time, it shortens the overall axial size of the electric bridge, reduces the setting cost, increases the lightweight of the vehicle, improves the cruising range, and enriches the vehicle's use scenarios, with better use effects and a wider range of applications.

[0051] In some embodiments, the transmission structure 6 is provided with a limited slip differential 93 , and the transmission structure 6 is selectively connected to the second wheel axle 2 via the limited slip differential 93 , or the transmission structure 6 is selectively connected to the first wheel axle 1 via the limited slip differential 93 .

[0052] Specifically, the transmission structure 6 is provided with a limited slip differential 93, and as Figure 1 As shown, the transmission structure 6 is selectively connected to the second wheel axle 2 through the limited slip differential 93, that is, the transmission structure 6 can be connected to the second wheel axle 2 through the limited slip differential 93, and can also be disconnected from the second wheel axle 2 through the limited slip differential 93. When the transmission structure 6 is connected to the second wheel axle 2 through the limited slip differential 93, the drive motor 3 can drive the first wheel axle 1 and the second wheel axle 2 together through the transmission structure 6, and when the transmission structure 6 is disconnected from the second wheel axle 2 through the limited slip differential 93, the drive motor 3 can only drive the first wheel axle 1 through the transmission structure 6, so as to realize the switching between two-wheel drive and four-wheel drive, and has high flexibility in use.

[0053] Furthermore, if Figure 2 As shown, the transmission structure 6 can also be selectively power-connected to the first wheel axle 1 through the limited-slip differential 93, that is, the transmission structure 6 can be power-connected to the first wheel axle 1 through the limited-slip differential 93, and can also be power-disconnected from the first wheel axle 1 through the limited-slip differential 93. When the transmission structure 6 is power-connected to the first wheel axle 1 through the limited-slip differential 93, the drive motor 3 can drive the second wheel axle 2 and the first wheel axle 1 together through the transmission structure 6, and when the transmission structure 6 is power-disconnected from the first wheel axle 1 through the limited-slip differential 93, the drive motor 3 can only drive the second wheel axle 2 through the transmission structure 6, so as to realize switching between two-wheel drive and four-wheel drive, and has high flexibility in use.

[0054] The limited-slip differential 93 is internally equipped with two sets of friction plates: a driving plate and a driven plate. The driving plate can be connected to the structure on one side of the limited-slip differential 93, while the driven plate can be connected to the structure on the other side. The engagement and disengagement of the driving and driven plates are controlled by an electronic system. When the speed difference between the driving and driven plates exceeds a certain limit, for example, when the front wheels 94 or rear wheels 95 of the vehicle begin to slip, the electronic control system controls the hydraulic mechanism to tighten the multi-plate clutch, causing the driving and driven plates to come into contact. This allows the structures on both sides of the limited-slip differential 93 to be dynamically connected, thus achieving four-wheel drive.

[0055] In some embodiments, the power drive system 100 further includes: a first transmission shaft 4 and a second transmission shaft 5 , wherein the first transmission shaft 4 is connected between the first wheel axle 1 and the transmission structure 6 , and the second transmission shaft 5 is connected between the second wheel axle 2 and the transmission structure 6 .

[0056] Specifically, the drive system is further provided with a first transmission shaft 4 and a second transmission shaft 5. Figure 1-Figure 2 As shown, the first transmission shaft 4 is arranged between the transmission structure 6 and the first wheel axle 1, and the two ends of the first transmission shaft 4 are respectively connected to the transmission structure 6 and the first wheel axle 1 by power, so that the transmission structure 6 can transmit power to the first wheel axle 1 through the first transmission shaft 4, and then the drive motor 3 can transmit power to the first transmission shaft 4 through the transmission structure 6, so that the first transmission shaft 4 drives the first wheel axle 1 to rotate, and then the first wheel axle 1 can drive the corresponding wheel to rotate.

[0057] Furthermore, the second transmission shaft 5 is arranged between the transmission structure 6 and the second wheel axle 2, and the two ends of the second transmission shaft 5 are respectively connected to the transmission structure 6 and the second wheel axle 2 by power, so that the transmission structure 6 can transmit power to the second wheel axle 2 through the second transmission shaft 5, and then the drive motor 3 can transmit power to the second transmission shaft 5 through the transmission structure 6, so that the second transmission shaft 5 drives the second wheel axle 2 to rotate, and then the second wheel axle 2 can drive the corresponding wheel to rotate.

[0058] In this way, power can be transmitted to the transmission structure 6 through a drive motor 3, and then driven to the first wheel axle 1 and the second wheel axle 2 through the first transmission shaft 4 and the second transmission shaft 5 respectively, thereby reducing the number of motors set up, thereby reducing the space occupied by the motors and the overall weight of the vehicle, reducing the setting cost, increasing the lightweight of the vehicle, and improving the cruising range.

[0059] In some embodiments, the first wheel axle 1 includes a first half-shaft 11 and a second half-shaft 12 , a first differential 91 is connected between the first half-shaft 11 and the second half-shaft 12 , and the first transmission shaft 4 is power-connected to the first differential 91 .

[0060] Specifically, the first wheel axle 1 includes a first half-shaft 11 and a second half-shaft 12. One of the first half-shaft 11 and the second half-shaft 12 can be used to connect the left wheel, and the other of the first half-shaft 11 and the second half-shaft 12 can be used to connect the right wheel. That is, when the first half-shaft 11 is set on the left side of the vehicle and the second half-shaft 12 is set on the right side of the vehicle, the first half-shaft 11 is used to connect the left wheel and the second half-shaft 12 is used to connect the right wheel. When the first half-shaft 11 is set on the right side of the vehicle and the second half-shaft 12 is set on the left side of the vehicle, the first half-shaft 11 is used to connect the right wheel and the second half-shaft 12 is used to connect the left wheel, and the setting flexibility is high.

[0061] Furthermore, if Figure 1-Figure 2As shown, a first differential 91 is connected between the first half-shaft 11 and the second half-shaft 12, and the first drive shaft 4 is power-connected to the first differential 91, that is, the power of the first drive shaft 4 can be transmitted to the first differential 91, and the differential action of the first differential 91 causes the first half-shaft 11 and the second half-shaft 12 to rotate at different speeds, thereby causing the wheels corresponding to the first half-shaft 11 and the second half-shaft 12 to rotate at different speeds, thereby ensuring the driving stability of the vehicle when turning or on uneven roads.

[0062] The second wheel axle 2 includes a third half-shaft 21 and a fourth half-shaft 22 . A second differential 92 is connected between the third half-shaft 21 and the fourth half-shaft 22 . The second transmission shaft 5 is power-connected to the second differential 92 .

[0063] Specifically, the second wheel axle 2 includes a third half-shaft 21 and a fourth half-shaft 22. One of the third half-shaft 21 and the fourth half-shaft 22 can be used to connect the left wheel, and the other of the third half-shaft 21 and the fourth half-shaft 22 can be used to connect the right wheel. That is, when the third half-shaft 21 is set on the left side of the vehicle and the fourth half-shaft 22 is set on the right side of the vehicle, the third half-shaft 21 is used to connect the left wheel and the fourth half-shaft 22 is used to connect the right wheel. When the third half-shaft 21 is set on the right side of the vehicle and the fourth half-shaft 22 is set on the left side of the vehicle, the third half-shaft 21 is used to connect the right wheel and the fourth half-shaft 22 is used to connect the left wheel, and the setting flexibility is high.

[0064] Furthermore, if Figure 1-Figure 2 As shown, a second differential 92 is connected between the third half-shaft 21 and the fourth half-shaft 22, and the second drive shaft 5 is power-connected to the second differential 92, that is, the power of the second drive shaft 5 can be transmitted to the second differential 92, and the differential action of the second differential 92 causes the third half-shaft 21 and the fourth half-shaft 22 to rotate at different speeds, thereby causing the wheels corresponding to the third half-shaft 21 and the fourth half-shaft 22 to rotate at different speeds, thereby ensuring the driving stability of the vehicle when turning or on uneven roads.

[0065] In some embodiments, the transmission structure 6 includes an intermediate transmission shaft 61, and the drive motor 3 is provided with a motor shaft 31. The intermediate transmission shaft 61 and the motor shaft 31 are spaced apart and distributed in parallel along the transverse direction of the vehicle, that is, along the left and right directions of the vehicle. In this way, the bottom space of the vehicle can be fully utilized to arrange the transmission structure 6 to avoid interference between the various shafts. At the same time, the transverse arrangement of the intermediate transmission shaft 61 and the motor shaft 31 can also shorten the power transmission path from the transmission structure 6 to each wheel, thereby improving the power transmission efficiency.

[0066] like Figure 1-Figure 2As shown, the motor shaft 31 is provided with a driving input gear 311, the intermediate transmission shaft 61 is provided with a coaxially distributed intermediate transmission gear 611 and an intermediate output gear 612, and the first transmission shaft 4 is connected to the transmission input gear 41. That is to say, when the motor shaft 31 rotates, it can drive the driving input gear 311 to rotate synchronously, when the intermediate transmission shaft 61 rotates, it can drive the intermediate transmission gear 611 and the intermediate output gear 612 to rotate, and when the intermediate output gear 612 rotates, it can drive the transmission input gear 41 to rotate.

[0067] Among them, the motor shaft 31 is power-connected to the drive motor 3, and the first transmission shaft 4 is power-connected to the first wheel shaft 1, the active input gear 311 is meshed with the intermediate transmission gear 611 for transmission, the intermediate output gear 612 is meshed with the transmission input gear 41 for transmission, and the intermediate transmission shaft 61 is connected to the second transmission shaft 5.

[0068] Specifically, if Figure 1 As shown, the motor shaft 31 of the drive motor 3 is connected to the active input gear 311, which is meshed with the intermediate transmission gear 611, and the intermediate output gear 612 is meshed with the transmission input gear 41. Thus, the drive motor 3 can provide power to drive the motor shaft 31 to rotate. When the motor shaft 31 rotates, the active input gear 311 can be driven to rotate, which in turn drives the intermediate transmission gear 611 meshed therewith to rotate. When the intermediate transmission gear 611 rotates, the intermediate transmission shaft 61 and the intermediate output gear 612 can be driven to rotate. When the intermediate output gear 612 rotates, the transmission input gear 41 meshed therewith can be driven to rotate, which in turn drives the first transmission shaft 4 to rotate, thereby achieving power transmission from the drive motor 3 to the first transmission shaft 4. Furthermore, when the intermediate transmission shaft 61 rotates, the second transmission shaft 5 connected thereto can be driven to rotate, thereby achieving power transmission from the drive motor 3 to the second transmission shaft 5.

[0069] In actual design, the motor shaft 31 can be power-connected to the first wheel axle 1 via the first transmission shaft 4 and the first differential 91, and can also be power-connected to the second wheel axle 2 via the second transmission shaft 5 and the second differential 92. That is, the power of the motor shaft 31 can be transmitted to the first transmission shaft 4 and the first differential 91, and then to the first wheel axle 1, and to the second transmission shaft 5 and the second differential 92, and then to the second wheel axle 2, thereby achieving power connection and power transmission from the motor shaft 31 to the first wheel axle 1 and the second wheel axle 2. Furthermore, the differential action of the first differential 91 and the second differential 92 can enable the left and right wheels to rotate at different speeds. Furthermore, the transmission structure 6 can be disposed in the intermediate transfer case 96 to ensure stable transmission of the transmission structure 6.

[0070] In some embodiments, there are multiple active input gears 311 and intermediate transmission gears 611, that is, the number of active input gears 311 and intermediate transmission gears 611 can be set to two, three or even more. By setting multiple active input gears 311 and multiple intermediate transmission gears 611, the power of the drive motor 3 can be transmitted to multiple intermediate transmission gears 611 through multiple active input gears 311, and then transmitted to the intermediate transmission shaft 61, thereby improving the power transmission efficiency between the drive motor 3 and the intermediate transmission shaft 61, and the rotational speeds of the multiple intermediate transmission gears 611 can be different, thereby realizing the adjustment of different gear numbers.

[0071] Furthermore, the multiple active input gears 311 are matched with the multiple intermediate transmission gears 611 in a one-to-one correspondence, that is, the number of active input gears 311 and the intermediate transmission gears 611 are the same and their positions correspond to each other, so that each active input gear 311 can be meshed with an intermediate transmission gear 611 to form multiple independent transmission paths, which not only improves the power transmission stability, but also improves the power transmission efficiency, and the various transmission paths do not interfere with each other.

[0072] Furthermore, multiple intermediate transmission gears 611 can be selectively connected to the intermediate transmission shaft 61 in terms of power, that is, multiple intermediate transmission gears 611 can rotate freely on the intermediate transmission shaft 61 to be connected to the intermediate transmission shaft 61 in terms of power. In other words, when the multiple intermediate transmission gears 611 rotate, they can drive the intermediate transmission shaft 61 to rotate, thereby transmitting power to the intermediate transmission shaft 61. They can also be fixedly connected to the intermediate transmission shaft 61, that is, they cannot rotate freely on the intermediate transmission shaft 61 to disconnect the power connection with the intermediate transmission shaft 61, and cannot transmit power to the intermediate transmission shaft 61.

[0073] And the synchronizer S1 can realize selective power connection between multiple intermediate transmission gears 611 and the intermediate transmission shaft 61. That is to say, when the synchronizer S1 is engaged with one of the intermediate transmission gears 611, this intermediate transmission gear 611 is fixedly connected to the intermediate transmission shaft 61 and cannot rotate. When the synchronizer S1 is not engaged with the intermediate transmission gear 611, the intermediate transmission gear 611 is dynamically connected to the intermediate transmission shaft 61.

[0074] Specifically, refer to the attached Figure 1-Figure 2 As shown, two intermediate transmission gears 611 and two active input gears 311 are provided. The two active input gears 311 and the two intermediate transmission gears 611 are meshed with each other in a one-to-one correspondence, and a synchronizer S1 is provided between the two intermediate transmission gears 611. The synchronizer S1 can be combined with any one of the two intermediate transmission gears 611 to fix the intermediate transmission gear 611 and the intermediate transmission shaft 61 to disconnect the power connection. The other intermediate transmission gear 611 can rotate relative to the intermediate transmission shaft 61 to achieve power connection, thereby adjusting the number of gears and achieving gear shifting. Figure 1-Figure 2 Shown in FIG are two intermediate transmission gears 611 and two active input gears 311, namely Figure 1-Figure 2 Two gears are used for illustration, and other gear numbers can also be set. You can flexibly choose according to actual needs.

[0075] In some embodiments, the limited slip differential 93 is selectively connected between the transmission input gear 41 and the first transmission shaft 4 , or the limited slip differential 93 is selectively connected between the intermediate transmission shaft 61 and the second transmission shaft 5 .

[0076] Specifically, the transmission structure 6 is provided with a limited slip differential 93, and as Figure 2 As shown, the limited slip differential 93 is selectively connected between the transmission input gear 41 and the first transmission shaft 4, that is, the transmission input gear 41 can be power-connected to the first transmission shaft 4 through the limited slip differential 93, and can also be power-disconnected from the first transmission shaft 4 through the limited slip differential 93. When the transmission input gear 41 is power-connected to the first transmission shaft 4 through the limited slip differential 93, the drive motor 3 can transmit power to the first transmission shaft 4 through the motor shaft 31, the active input gear 311, the intermediate transmission gear 611 and the transmission input gear 41, so as to drive the second wheel axle 2 and the first wheel axle 1 together, and when the transmission input gear 41 is power-disconnected from the first transmission shaft 4 through the limited slip differential 93, the drive motor 3 can only drive the second wheel axle 2 through the transmission structure 6 to realize switching between two-wheel drive and four-wheel drive, with high flexibility in use.

[0077] Furthermore, if Figure 1 As shown, the limited slip differential 93 is selectively connected between the intermediate drive shaft 61 and the second drive shaft 5, that is, the intermediate drive shaft 61 can be power-connected to the second drive shaft 5 through the limited slip differential 93, and can also be power-disconnected from the second drive shaft 5 through the limited slip differential 93. When the intermediate drive shaft 61 is power-connected to the second drive shaft 5 through the limited slip differential 93, the drive motor 3 can transmit power to the second drive shaft 5 through the motor shaft 31, the active input gear 311, the intermediate transmission gear 611 and the intermediate drive shaft 61, so as to drive the first wheel axle 1 and the second wheel axle 2 together, and when the intermediate drive shaft 61 is power-disconnected to the second drive shaft 5 through the limited slip differential 93, the drive motor 3 can only drive the first wheel axle 1 through the transmission structure 6 to realize switching between two-wheel drive and four-wheel drive, with high flexibility in use.

[0078] In some embodiments, along the longitudinal direction of the vehicle, the drive motor 3 , the transmission structure 6 , the first transmission shaft 4 and the second transmission shaft 5 are all located between the first wheel axle 1 and the second wheel axle 2 .

[0079] Specifically, the drive motor 3, the transmission structure 6, the first transmission shaft 4 and the second transmission shaft 5 are located between the first wheel axle 1 and the second wheel axle 2 in the longitudinal direction of the vehicle, that is, in the front-rear direction of the vehicle. Figure 1-Figure 2 As shown, the drive motor 3 , the transmission structure 6 , the first transmission shaft 4 and the second transmission shaft 5 are all located on the rear side of the first wheel axle 1 and the front side of the second wheel axle 2 .

[0080] Such a setting 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 can more evenly distribute the weight of the drive motor 3, transmission structure 6, first transmission shaft 4 and second transmission shaft 5 on the first wheel axle 1 and second wheel axle 2 of the vehicle, thereby improving the stability and balance of the vehicle.

[0081] At the same time, the drive motor 3, the transmission structure 6, the first transmission shaft 4 and the second transmission shaft 5 are all integrated together and arranged between the first wheel axle 1 and the second wheel axle 2, which can also reduce the energy loss during power transmission and make it easier to cooperate with the range extender, namely the engine 98 and the generator 97, thereby improving the driving efficiency.

[0082] In other embodiments, the first wheel axle 1 is the front wheel axle of the vehicle, and the second wheel axle 2 is the rear wheel axle of the vehicle.

[0083] That is to say, if Figure 1-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 drive motor 3 can drive the first wheel axle 1, that is, the front wheel axle of the vehicle, to rotate, and then drive the two front wheels 94 to rotate, realizing front-wheel drive. The second wheel axle 2 is located at the rear of the vehicle and is connected to the rear wheel 95. In this way, the drive motor 3 can drive the second wheel axle 2, that is, the rear wheel axle of the vehicle, to rotate, and then drive the two rear wheels 95 to rotate, realizing rear-wheel drive. When the limited-slip differential 93 is closed, the drive motor 3 can respectively drive the first wheel axle 1 and the second wheel axle 2 to rotate, and then drive the two front wheels 94 and the two rear wheels 95 to rotate, realizing four-wheel drive.

[0084] The utility model also provides a vehicle.

[0085] The vehicle according to the embodiment of the present invention is provided with any one of the power drive systems 100 described above.

[0086] According to the vehicle of the embodiment of the present invention, the drive motor 3 is used to drive one of the first wheel axle 1 and the second wheel axle 2 to rotate, and the drive motor 3 is used to selectively drive the other of the first wheel axle 1 and the second wheel axle 2 to rotate, so that the switching between the two-wheel drive condition and the four-wheel drive condition can be realized by one motor, thereby realizing flexible and efficient vehicle drive. Compared with the traditional hybrid-range extended-range hybrid power system, the present invention highlights the pure electric driving function, reduces fuel consumption, and improves the fuel economy, power performance and handling of the vehicle; at the same time, it shortens the overall axial dimension of the electric bridge, reduces the setting cost, increases the lightweight of the vehicle, improves the cruising range, and enriches the vehicle usage scenarios, with better usage effects and a wider range of applications.

[0087] The vehicle of this embodiment may be an off-road vehicle, a sedan, a pickup truck, an SUV, etc.

[0088] In some embodiments, the engine 98 and the generator 97 are mounted within the nacelle.

[0089] Specifically, if Figure 1-Figure 2 As shown, the engine 98 and the generator 97 are arranged at the front of the vehicle. In this way, the engine 98 and the generator 97, i.e., the range extender, can be installed in the engine compartment to ensure the normal operation of the engine 98 and the generator 97 and reduce the impact on the surrounding environment, which is convenient for maintenance and operation. The arrangement is longitudinal, that is, the engine 98 and the generator 97 are arranged in sequence along the front and rear directions, and the generator 97 is arranged close to the drive motor 3, which is conducive to transmitting electrical energy to the drive motor 3. Of course, in practice, since the range extender does not directly participate in the drive, the engine 98 and the generator 97 can also be installed horizontally in the engine compartment, and can be flexibly arranged according to the space of the entire vehicle, and is not limited to the description in this embodiment.

[0090] In other embodiments, the drive motor 3 and the transmission structure 6 are located under the vehicle floor.

[0091] Specifically, refer to Figure 1-Figure 2 As shown, the drive motor 3 and the transmission structure 6 are roughly located in the middle of the vehicle. The drive motor 3 and the transmission structure 6 can be set under the vehicle floor. This is beneficial to lowering the center of gravity of the vehicle and to facilitate the power of the drive motor 3 to directly drive the first wheel axle 1 through the transmission structure 6.

[0092] In some embodiments, a differential lock may be provided on the first differential 91 or the second differential 92 , or a differential lock may be provided on both the first differential 91 and the second differential 92 , and the differential lock may be flexibly provided according to the actual needs of the vehicle.

[0093] The following is the power transmission path of the power drive system 100 of the present invention under different operating conditions:

[0094] (1) In pure electric front drive mode, if Figure 1 As shown, the drive motor 3 is driven. At this time, the limited slip differential 93 is separated. The power of the drive motor 3 can only be transmitted to the first wheel axle 1 through the transmission structure 6, and then to the front wheels 94 to drive the vehicle. The high gear or low gear can be selected through the synchronizer S1. The low gear can be combined with the differential lock to improve the low-speed escape ability, and the high gear can ensure high speed while taking into account fuel economy.

[0095] (2) In pure electric rear-wheel drive mode, if Figure 2 As shown, the drive motor 3 is driven. At this time, the limited slip differential 93 is separated. The power of the drive motor 3 can only be transmitted to the second wheel axle 2 through the transmission structure 6, and then transmitted to the rear wheel 95 to drive the vehicle. The high gear or low gear can be selected through the synchronizer S1. The low gear can be combined with the differential lock to improve the low-speed escape ability, and the high gear can ensure high speed while taking into account fuel economy.

[0096] (3) In pure electric four-wheel drive mode, the drive motor 3 drives, such as Figure 1 As shown, the limited slip differential 93 is closed, or as Figure 2 As shown, the limited-slip differential 93 is closed, and the power of the drive motor 3 can be transmitted to the first wheel axle 1 and the second wheel axle 2 respectively through the transmission structure 6, and then simultaneously transmitted to the front wheels 94 and the rear wheels 95 to drive the vehicle, and the high gear or low gear can be selected through the synchronizer S1. The low-speed gear combined with the differential lock can improve the low-speed escape ability, and the high-speed gear can ensure high speed while taking into account fuel economy.

[0097] (4) In the extended-range front-wheel drive mode, the range extender works, that is, the generator 97 generates electricity and transmits the electric energy to the drive motor 3, which drives the drive motor 3. The subsequent driving mode is the same as the pure electric front-wheel drive mode.

[0098] (5) In the extended-range rear-wheel drive mode, the range extender works, that is, the generator 97 generates electricity and transmits the electric energy to the drive motor 3, which drives the drive motor 3. The subsequent driving mode is the same as the pure electric rear-wheel drive mode.

[0099] (6) In the extended-range four-wheel drive mode, the range extender works, that is, the generator 97 generates electricity and transmits the electric energy to the drive motor 3, which drives the drive motor 3. The subsequent driving mode is the same as the pure electric four-wheel drive mode.

[0100] (7) During the braking energy recovery operation, the vehicle performs braking energy recovery through the drive motor 3. That is, when the vehicle brakes, the drive motor 3 can be used as a generator 97 to convert the vehicle's kinetic energy into electrical energy and store it in the battery, which is beneficial to extend the battery's range, improve the vehicle's energy efficiency, and reduce fuel consumption.

[0101] (8) In the reversing mode, the reversing function can be achieved by controlling the drive motor 3 to reverse.

[0102] 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.

[0103] 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 drive motor is connected to one of the first wheel axle and the second wheel axle through a transmission structure for driving one of the first wheel axle and the second wheel axle to rotate, and the drive motor is selectively connected to the other of the first wheel axle and the second wheel axle through a transmission structure for selectively driving the other 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 transmission structure is provided with a limited slip differential; The transmission structure is selectively connected to the second wheel axle in power through the limited slip differential, or the transmission structure is selectively connected to the first wheel axle in power through the limited slip differential.

3. The power drive system according to claim 2, characterized in that: Also includes: A first transmission shaft and a second transmission shaft, wherein the first transmission shaft is connected between the first wheel axle and the transmission structure, and the second transmission shaft is connected between the second wheel axle and the transmission structure.

4. The power drive system according to claim 3, characterized in that: The first wheel axle includes a first half-shaft and a second half-shaft, a first differential is connected between the first half-shaft and the second half-shaft, and the first transmission shaft is power-connected to the first differential; The second wheel axle includes a third half-shaft and a fourth half-shaft, a second differential is connected between the third half-shaft and the fourth half-shaft, and the second transmission shaft is power-connected to the second differential.

5. The power drive system according to claim 3, characterized in that: The transmission structure includes an intermediate transmission shaft, the drive motor is provided with a motor shaft, the motor shaft is provided with an active input gear, the intermediate transmission shaft is provided with a coaxially distributed intermediate transmission gear and an intermediate output gear, the active input gear is meshed with the intermediate transmission gear for transmission, the first transmission shaft is connected with a transmission input gear, the intermediate output gear is meshed with the transmission input gear for transmission, and the intermediate transmission shaft is connected to the second transmission shaft.

6. The power drive system according to claim 5, characterized in that: There are multiple driving input gears and multiple intermediate transmission gears, and the multiple driving input gears are matched with the multiple intermediate transmission gears in a one-to-one correspondence.

7. The power drive system according to claim 5, characterized in that: The limited slip differential is selectively connected between the transmission input gear and the first transmission shaft; Alternatively, the limited slip differential is selectively connected between the intermediate transmission shaft and the second transmission shaft.

8. The power drive system according to claim 3, characterized in that: Along the longitudinal direction of the vehicle, the drive motor, the transmission structure, the first transmission shaft and the second transmission shaft are all located between the first wheel axle and the second wheel axle; And / or, the first wheel axle is the front wheel axle of the vehicle, and the second wheel axle is the rear wheel axle of the vehicle.

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

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

Images