Power transmission system and vehicle

Abstract

The utility model discloses a power transmission system and a vehicle, the power transmission system comprises an engine and a first motor; the planetary gear mechanism comprises a gear ring, a planetary gear and a sun gear, the planetary gear is meshed between the gear ring and the sun gear, and the gear ring is used for being selectively in power connection with a first wheel axle; wherein the engine is suitable for selectively transmitting power to the first motor through the planet gear and the sun gear so that the power can be generated by the first motor, and the first motor is suitable for selectively outputting the power through the sun gear, the planet gear and the gear ring. According to the power transmission system, power generation and driving are achieved through the first motor, the single planetary gear mechanism serves as a speed increasing / reducing mechanism, the number of parts of the power transmission system is reduced, the overall structure is compact, the occupied whole vehicle arrangement space is small, and the overall weight and the arrangement cost are reduced.

Description

Technical Field

[0001] This utility model relates to the field of vehicle manufacturing technology, and in particular to a power transmission system and a vehicle having the power transmission system. Background Technology

[0002] With the rapid development of new energy vehicles, range extenders can be used to increase their range. For range-extended new energy vehicles, the range extender architecture consists of an engine and a generator. The generator can only be used for power generation and cannot be used for driving. Therefore, four-wheel drive range-extended vehicles are usually equipped with two drive motors for driving the front and rear axles, and a motor for power generation, requiring a total of three motors. This increases the overall vehicle setup cost and occupies more interior space, leaving room for improvement. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a power transmission system that enables a single motor to generate electricity and drive the vehicle. Furthermore, it reuses a single planetary gear mechanism as a speed-up / speed-down mechanism, thereby reducing the number of parts in the power transmission system, resulting in a compact overall structure, minimal space occupation in the vehicle, and reduced overall weight and installation costs.

[0004] The power transmission system according to an embodiment of the present invention includes: an engine and a first motor; a planetary gear mechanism, the planetary gear mechanism including a ring gear, planet gears and a sun gear, the planet gears meshing between the ring gear and the sun gear, the ring gear being used for selective power connection with a first wheel axle; wherein, the engine is adapted to selectively transmit power through the planet gears and the sun gear to the first motor for generating electricity, and the first motor is adapted to selectively output power through the sun gear, the planet gears and the ring gear.

[0005] According to the power transmission system of this utility model embodiment, by setting a planetary gear mechanism to connect the engine and the first motor, the engine can generate electricity for the first motor through the planetary gear mechanism. Furthermore, by setting the first motor to be connected to the first wheel axle through the planetary gear mechanism, the first motor can output power to the first wheel axle through the planetary gear mechanism, thereby driving the wheel to rotate. In this way, the power generation and driving functions of the first motor can be realized. By reusing a single motor to achieve power generation and driving, and by reusing a single planetary gear mechanism as a speed-increasing / decelerating mechanism, the power transmission system has more reusable components, reduces the total number of parts, makes the overall structure compact, occupies less space in the vehicle layout, and reduces the overall weight and installation cost.

[0006] The power transmission system according to some embodiments of the present invention further includes a first locking structure, which is used to selectively fix the gear ring to the housing of the power transmission system.

[0007] The power transmission system according to some embodiments of the present invention further includes a clutch structure, wherein the planetary gears are connected to a planetary carrier, the clutch structure is connected between the planetary carrier and the engine, and is used to powerly connect the engine and the planetary carrier.

[0008] According to some embodiments of the present invention, the power transmission system of the clutch structure is configured as a one-way clutch, which is used to transmit the power of the engine to the planetary carrier in one direction.

[0009] The power transmission system according to some embodiments of the present invention further includes a second locking structure, which is used to fix the planetary carrier to the housing of the power transmission system when the first motor outputs power.

[0010] According to some embodiments of the present invention, in the power transmission system, the engine and the second locking structure are respectively disposed on both sides of the planetary carrier.

[0011] According to some embodiments of the present invention, in the power transmission system, the engine and the first motor are respectively located on both sides of the planetary gear mechanism.

[0012] The power transmission system according to some embodiments of the present invention further includes a transmission mechanism, the transmission mechanism including a transmission shaft and an output shaft, the transmission shaft having a first transmission gear and a second transmission gear, the gear ring being poweredly connected to the first transmission gear, the output shaft having an output gear, the second transmission gear meshing with the output gear, and the output shaft being poweredly connected to a first wheel axle.

[0013] The power transmission system according to some embodiments of the present invention further includes a second wheel axle and a second motor, wherein the first wheel axle and the second wheel axle are spaced apart along the longitudinal direction of the vehicle, and the second motor is poweredly connected to the second wheel axle to drive the second wheel axle to rotate.

[0014] This utility model also proposes a vehicle.

[0015] The vehicle according to the present invention is equipped with the power transmission system described in any of the above embodiments.

[0016] The vehicle and the aforementioned powertrain system have the same advantages over existing technologies, which will not be repeated here.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0019] Figure 1 This is a schematic diagram of the structure of a power transmission system according to an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the power transmission system according to another embodiment of the present invention;

[0021] Figure 3 This is a structural schematic diagram of a power transmission system applied to a vehicle according to an embodiment of the present utility model.

[0022] Figure label:

[0023] Power transmission system 100,

[0024] Engine 1, torsional damper 11, first motor 2, planetary gear mechanism 3, ring gear 31, planetary gear 32, planetary carrier 321, sun gear 33, first locking structure 4, clutch structure 5, one-way clutch 51, active clutch 52, second locking structure 6, transmission mechanism 7, transmission shaft 71, first transmission gear 711, second transmission gear 712, output shaft 72, output gear 721, first wheel axle 8, first wheel 81, second wheel axle 9, second wheel 91, second motor 10, battery 101. Detailed Implementation

[0025] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0026] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] Unless otherwise specified, the front-back direction in this application refers to the longitudinal direction of the vehicle, i.e., the X direction; the left-right direction refers to the lateral direction of the vehicle, i.e., the Y direction; and the up-down direction refers to the vertical direction of the vehicle, i.e., the Z direction.

[0029] The following is for reference. Figures 1-3 The power transmission system 100 according to the embodiment of the present utility model enables a first motor 2 to generate electricity and drive, and reuses a single planetary gear mechanism 3 as a speed-up / speed-down mechanism, which reduces the number of parts in the power transmission system 100, makes the overall structure compact, occupies less space in the vehicle layout, and reduces the overall weight and installation cost.

[0030] like Figures 1-3 As shown, a power transmission system 100 according to an embodiment of the present invention includes: an engine 1, a first motor 2, and a planetary gear mechanism 3.

[0031] Engine 1, as a core component in modern transportation vehicles and various mechanical equipment, primarily functions to convert fuel (such as gasoline and diesel) or other forms of energy (such as natural gas) into mechanical energy, enabling it to drive vehicles, ships, aircraft, and various industrial equipment. The first electric motor 2 can convert mechanical energy into electrical energy to generate electricity. The mechanical energy of the first electric motor 2 can originate from engine 1, allowing the driving energy of engine 1 to be used for power generation in the first electric motor 2. Simultaneously, the first electric motor 2 can also serve as a power source, driving vehicles and other equipment via electric drive.

[0032] The planetary gear mechanism 3 includes a ring gear 31, planet gears 32 and a sun gear 33. The planet gears 32 mesh between the ring gear 31 and the sun gear 33. The ring gear 31 is used for selective power connection with the first wheel axle 8.

[0033] Specifically, the planetary gear mechanism 3 is a speed-changing structure used to change the transmission speed and direction, and provide multiple transmission ratios. It includes a ring gear 31, planet gears 32, and a sun gear 33. The planet gear 32 is located between the ring gear 31 and the sun gear 33. The planet gears 32, ring gear 31, and sun gear 33 are meshed, and the planet gear 32 can mesh with both the ring gear 31 and the sun gear 33 simultaneously. In actual use, after relative motion occurs among the three, a certain speed ratio output can be achieved. Any one of the ring gear 31, planet gears 32, and sun gear 33 can be used as an output or input end, depending on the actual power transmission requirements.

[0034] In this embodiment, the gear ring 31 can be selectively connected to the first wheel axle 8. For example, the gear ring 31 can be connected to the first wheel axle 8 through a reduction mechanism, thus realizing the power connection between the planetary gear mechanism 3 and the first wheel axle 8. In this way, the power at the planetary gear mechanism 3 can be transmitted to the first wheel axle 8 through the gear ring 31, thereby driving the wheel at the first wheel axle 8 to rotate.

[0035] Furthermore, the gear ring 31 is selectively connected to the first wheel axle 8. In other words, power can be transmitted to the first wheel axle 8 through the gear ring 31 to actively drive the wheel at the first wheel axle 8 to rotate. Alternatively, power can be transmitted to the first wheel axle 8 without transmitting power through the gear ring 31, allowing other wheels in the vehicle to rotate through other means to achieve different driving modes. The first wheel axle 8 can be either the front wheel axle or the rear wheel axle.

[0036] The engine 1 is adapted to selectively transmit power to the first motor 2 via planetary gears 32 and sun gear 33 for generating electricity, and the first motor 2 is adapted to selectively output power via sun gear 33, planetary gears 32 and ring gear 31.

[0037] Specifically, the planetary gear mechanism 3 can be connected to the engine 1. Specifically, the planetary gear 32 can be powered to the engine 1, and the planetary gear 32 meshes with the ring gear 31 and the sun gear 33 respectively. The planetary gear mechanism 3 is also connected to the first motor 2. Specifically, the sun gear 33 can be powered to the first motor 2. The first motor 2 is provided with a motor shaft, through which the first motor 2 can be powered to the sun gear 33, thus realizing the power connection between the engine 1, the planetary gear mechanism 3 and the first motor 2.

[0038] Thus, in actual use, when engine 1 is working, the driving energy of engine 1 can be transmitted to sun gear 33 through planetary gear 32, and after speeding up and reducing torque, it is transmitted from sun gear 33 to first motor 2, which can make first motor 2 rotate. First motor 2 can convert mechanical energy into electrical energy through the cooperation of internal stator and rotor, so that engine 1 generates electricity for first motor 2.

[0039] Meanwhile, the first motor 2 is connected to the sun gear 33, and the ring gear 31 is selectively connected to the first wheel axle 8. In this way, after the first motor 2 is running, the power can be transmitted through the sun gear 33, planet gear 32 and ring gear 31, and after deceleration and torque increase, it is output from the ring gear 31 to the first wheel axle 8 to drive the wheel at the first wheel axle 8 to rotate. This is the electric drive mode.

[0040] The engine 1 can selectively generate electricity for the first motor 2, and the first motor 2 can selectively drive the first wheel axle 8 to rotate. That is, when the engine 1 generates electricity for the first motor 2, the first motor 2 can store electrical energy. At this time, the first motor 2 is not used for power output. However, when the first motor 2 is used for power output, the engine 1 does not generate electricity for the first motor 2. In this way, by switching the power flow direction of the planetary gear mechanism 3, the first motor 2 can have the functions of generating electricity and driving.

[0041] Furthermore, it should be noted that integrating the generator and drive motor into a coaxial composite structure of a first motor 2 enables the rotor of the first motor 2 to have a bidirectional multiplexing function, thereby realizing the power generation and driving functions of the first motor 2.

[0042] According to the power transmission system 100 of this utility model embodiment, the engine 1 and the first motor 2 are connected by a planetary gear mechanism 3. The engine 1 generates electricity to the first motor 2 through the planetary gear mechanism 3, and the first motor 2 is connected to the first wheel axle 8 through the planetary gear mechanism 3. The first motor 2 outputs power to the first wheel axle 8 through the planetary gear mechanism 3, thereby driving the wheel to rotate. In this way, the first motor 2 can achieve both power generation and driving functions. Compared with the prior art, which uses a generator with a speed-increasing mechanism for power generation and a drive motor with a speed-reducing mechanism for driving, this utility model reuses a single motor to achieve both power generation and driving, and reuses a single planetary gear mechanism 3 as a speed-increasing / speed-reducing mechanism. This results in more reused components in the power transmission system 100, a reduced total number of parts, a compact overall structure, a smaller footprint in the vehicle, and reduced overall weight and installation costs.

[0043] In some embodiments, the power transmission system 100 further includes a first locking structure 4 for selectively fixing the gear ring 31 to the housing of the power transmission system 100.

[0044] Specifically, the first locking structure 4 has a locking function. In practical application, the first locking structure 4 can lock or unlock the gear ring 31 and the housing of the power transmission system 100. That is, the first locking structure 4 can switch the gear ring 31 and the housing of the power transmission system 100 between the locked state and the unlocked state.

[0045] When the first locking structure 4 locks the gear ring 31 to the housing of the power transmission system 100, the gear ring 31 is fixed relative to the housing of the power transmission system 100, meaning the gear ring 31 does not move. Simultaneously, when the engine 1 is operating, the driving energy at the engine 1 is transferred to the first motor 2 via the planetary gear 32 and the sun gear 33, enabling the engine 1 to generate electricity for the first motor 2. Since the gear ring 31 does not move at this time, meaning it is not used for power output, more driving energy from the engine 1 can be used for generating electricity for the first motor 2, improving the power generation efficiency of the first motor 2 and thus improving the energy utilization rate of the engine 1.

[0046] Furthermore, when the first locking structure 4 unlocks the gear ring 31 from the housing of the power transmission system 100, the gear ring 31 is not fixed relative to the housing of the power transmission system 100, that is, the gear ring 31 can move. At the same time, when the first motor 2 is used for driving, the engine 1 can not work. The driving energy of the first motor 2 is transmitted to the first wheel axle 8 through the sun gear 33, planet gear 32 and gear ring 31, so that the first motor 2 drives the wheel to rotate.

[0047] Therefore, by switching the connection state of the gear ring 31 relative to the housing of the power transmission system 100 through the first locking structure 4, the dual-state switching of the planetary gear mechanism 3 can be realized, so that the first motor 2 can generate electricity and drive in different states when the planetary gear mechanism 3 is in different states. Moreover, the use of the first locking structure 4 makes the function switching of the first motor 2 more reliable and safe.

[0048] In some embodiments, the power transmission system 100 further includes a clutch structure 5, the planetary gear 32 is connected to the planetary carrier 321, the clutch structure 5 is connected between the planetary carrier 321 and the engine 1, and is used to power connect the engine 1 and the planetary carrier 321.

[0049] Specifically, the clutch structure 5 is used to disconnect and connect the power transmission process. The clutch structure 5 is set between the planet carrier 321 and the engine 1. The engine 1 is provided with a drive shaft. That is, the clutch structure 5 can be set between the planet carrier 321 and the drive shaft, so that the engine 1 can be connected to the planet gear 32 through the clutch structure 5. In this way, the driving energy at the engine 1 can be transmitted to the planet gear 32 through the clutch structure 5 and the planet carrier 321.

[0050] In practical use, when engine 1 is working, clutch structure 5 is in the connected state. The driving energy of engine 1 can be transmitted through clutch structure 5 to planet carrier 321 and planet gear 32, and then through sun gear 33 to the first motor 2, thereby generating electricity for the first motor 2. When the power of the first motor 2 is transmitted to sun gear 33, planet gear 32 and ring gear 31, and output through ring gear 31, clutch structure 5 is in the disengaged state. Clutch structure 5 can prevent the power at planet gear 32 from being transmitted to engine 1.

[0051] It should be noted that the planet carrier 321 can be detachably connected to the planet gear 32, and the planet carrier 321 can be connected to the central axis of the planet gear 32. In this way, the planet carrier 321 and the planet gear 32 can rotate coaxially, and the planet gear 32 can rotate relative to the planet carrier 321. Furthermore, the planet gear 32 can be set as one or more. When there are multiple planet gears 32, the planet carrier 321 can be connected to multiple planet carriers 321 at the same time, so that multiple planet gears 32 are connected to the planet carrier 321 together. Moreover, the planetary gear mechanism 3 is not limited to that described in this embodiment, and can be selectively set according to the actual speed ratio requirements.

[0052] In some embodiments, the clutch structure 5 is configured as a one-way clutch 51, which is used to transmit the power of the engine 1 to the planetary carrier 321 in one direction.

[0053] Specifically, an anti-reverse locking mechanism can be provided in the one-way clutch 51, which enables the one-way clutch 51 to transmit power in one direction and prevent reverse rotation. Figure 1As shown, the one-way clutch 51 is positioned between the engine 1 and the planetary carrier 321, allowing power from the engine 1 to be transmitted to the planetary carrier 321 via the one-way clutch 51. When the engine 1 is not working, the reverse blocking effect of the one-way clutch 51 prevents power from the planetary carrier 321 from being transmitted to the engine 1 via the one-way clutch 51, thus preventing the engine 1 from reversing and improving the reliability and stability of the forward power output of the engine 1.

[0054] In practical use, when engine 1 is running, the one-way clutch 51 connects engine 1 to planetary carrier 321 in the forward direction. The driving energy of engine 1 is transmitted to planetary carrier 321 and planetary gears 32 through the one-way clutch 51. At this time, the ring gear 31 is locked by the first locking structure 4, and the power at planetary gears 32 is then transmitted to the first motor 2 through sun gear 33, realizing the generation of electricity for the first motor 2. When engine 1 is not running, the one-way clutch 51 can disconnect engine 1 from planetary carrier 321 in the reverse direction. The power of the first motor 2 is transmitted to sun gear 33, planetary gears 32 and ring gear 31, and power is output through ring gear 31. At this time, the one-way clutch 51 can prevent the power at planetary gears 32 from being transmitted to engine 1.

[0055] In some embodiments, the power transmission system 100 further includes a second locking structure 6, which is used to fix the planetary carrier 321 to the housing of the power transmission system 100 when the first motor 2 outputs power.

[0056] Specifically, the second locking structure 6 has a locking function, which can lock or unlock the planetary carrier 321 and the housing of the power transmission system 100. That is, the second locking structure 6 can switch the planetary carrier 321 and the housing of the power transmission system 100 between locked and unlocked states. In practical application, when the first motor 2 needs to output power, the second locking structure 6 locks the planetary carrier 321 and the housing of the power transmission system 100; when the first motor 2 needs to generate electricity, the second locking structure 6 unlocks the planetary carrier 321 and the housing of the power transmission system 100.

[0057] Among them, such as Figure 2As shown, the clutch structure 5 between the planetary carrier 321 and the engine 1 can be constructed as a general active clutch 52. The active clutch 52 has the function of connection and switching. When the second locking structure 6 locks the planetary carrier 321 to the housing of the power transmission system 100, the planetary carrier 321 can be fixed relative to the housing of the power transmission system 100, that is, the planetary carrier 321 does not move, and the planetary gear 32 can rotate relative to the planetary carrier 321, realizing the rotation of the planetary gear 32. At the same time, the active clutch 52 is disengaged, the engine 1 does not work, and the first locking structure 4 unlocks the gear ring 31, that is, the gear ring 31 can move. When this happens, the first motor 2 is used for power output. The driving energy of the first motor 2 can be transmitted to the first wheel axle 8 through the sun gear 33, the planetary gear 32 and the gear ring 31, realizing the first motor 2 driving the wheel to rotate.

[0058] Furthermore, when engine 1 is running, active clutch 52 engages, and first locking structure 4 locks gear ring 31, meaning that when gear ring 31 is not moving, first motor 2 is used for power generation, i.e., gear ring 31 is not used for power output. And second locking structure 6 unlocks planetary carrier 321 from the housing of power transmission system 100, allowing more driving energy from engine 1 to be transmitted to first motor 2 through active clutch 52, planetary carrier 321, planetary gear 32 and sun gear 33 for power generation by first motor 2.

[0059] Thus, by switching the connection state of the planetary carrier 321 relative to the housing of the power transmission system 100 through the second locking structure 6, and by switching the connection state of the gear ring 31 relative to the housing of the power transmission system 100 through the first locking structure 4, and by switching the connection and disconnection of the active clutch 52, the power generation and driving functions of the first motor 2 can be realized respectively. Furthermore, the use of the second locking structure 6 and the first locking structure 4 makes the function switching of the first motor 2 more reliable and safe.

[0060] It should be noted that, for example Figure 1 and Figure 2 As shown, a torsional damper 11 is provided between the engine 1 and the clutch structure 5. The torsional damper 11 has the functions of suppressing vibration, reducing noise, and protecting the transmission system. That is, by using the torsional damper 11, the smooth operation of the engine 1 and other transmission systems such as the planetary gear mechanism 3 can be ensured. By absorbing vibration energy, the torsional vibration and bumpy feeling of the vehicle are reduced, vibration noise is reduced, the passenger riding experience is improved, and the impact of vibration on other parts is reduced, thus extending the overall service life of the vehicle.

[0061] In some embodiments, the engine 1 and the second locking structure 6 are respectively located on both sides of the planetary carrier 321, that is, the engine 1 is located at one end of the planetary carrier 321 and the second locking structure 6 is located at the other end of the planetary carrier 321. The engine 1 and the clutch structure 5 can both be located at the same end of the planetary carrier 321. In this way, the engine 1 and the clutch structure 5 and the second locking structure 6 can be distributed separately through the planetary carrier 321, so that the clutch structure 5 and the second locking structure 6 can respectively realize the individual control function of the planetary carrier 321.

[0062] In practical use, when the clutch structure 5 is configured to connect the engine 1 to the planetary carrier 321, the power of the engine 1 is transmitted to the planetary gear 32 through the clutch structure 5 via one end of the planetary carrier 321. When the clutch structure 5 is configured to disconnect the engine 1 from the planetary carrier 321, the second locking structure 6 fixes the planetary carrier 321 to the housing of the power transmission system 100, and the power at the planetary gear 32 cannot be transmitted to the engine 1 through the planetary carrier 321 and the clutch structure 5. In this way, the power can be distributed differently from the planetary carrier 321 to meet different power transmission requirements.

[0063] Among them, such as Figure 1 and Figure 2 As shown, at least a portion of the planetary carrier 321 can extend along a direction parallel to the central axis of the planetary gear mechanism 3, and the drive shaft of the engine 1 can be distributed along the central axis of the planetary gear mechanism 3. The engine 1 can be connected to one axial end of the planetary carrier 321 through the clutch structure 5, and the second locking structure 6 can be located at the other axial end of the planetary carrier 321. Their distribution will not interfere with each other, and the assembly process is simple and convenient.

[0064] It should also be noted that the first locking structure 4 and the second locking structure 6 can be a brake clutch or the like.

[0065] In some embodiments, the engine 1 and the first motor 2 are respectively located on both sides of the planetary gear mechanism 3. That is, the engine 1 can be connected to one side of the axial direction of the sun gear 33 of the planetary gear mechanism 3, and the first motor 2 can be connected to the other side of the axial direction of the sun gear 33 of the planetary gear mechanism 3. The connection between the engine 1 and the first motor 2 can be realized on one side of the axial direction of the planetary gear mechanism 3, and the connection between the first motor 2 and the first motor 2 can be realized on the other side of the axial direction of the planetary gear mechanism 3. In this way, the power of the engine 1 can be input to the planetary gear mechanism 3 from one side of the planetary gear mechanism 3, and the power of the first motor 2 can be input to the planetary gear mechanism 3 from the other side of the planetary gear mechanism 3, so as to drive the first motor 2 and generate electricity respectively.

[0066] The first motor 2 and the engine 1 are respectively located on both sides of the planetary gear mechanism 3, which allows the first motor 2 and the engine 1 to occupy the axial space of the planetary gear mechanism 3 respectively. The overall structure is more compact, and the two structures will not interfere with each other, making it convenient to maintain each one separately.

[0067] In this configuration, the engine 1, sun gear 33, and first motor 2 can be arranged axially opposite each other along the motor shaft, meaning the axes of the drive shaft of engine 1, the sun gear shaft, and the motor shaft of first motor 2 coincide. This ensures a symmetrical distribution of power transmission from engine 1 to planetary gear mechanism 3 and between sun gear 33 and first motor 2, shortening the power transmission path and improving power transmission efficiency. Furthermore, the sun gear 33 is located at the center of planetary gear mechanism 3, allowing engine 1 and first motor 2 to be connected to the center of the mechanism, resulting in an approximately symmetrical overall structure. This arrangement also leads to a more compact structure, a more regular overall shape, and easier installation and maintenance.

[0068] In some embodiments, the power transmission system 100 further includes a transmission mechanism 7, which includes a transmission shaft 71 and an output shaft 72. The transmission shaft 71 is provided with a first transmission gear 711 and a second transmission gear 712. The gear ring 31 is poweredly connected to the first transmission gear 711. The output shaft 72 is provided with an output gear 721. The second transmission gear 712 meshes with the output gear 721, and the output shaft 72 is poweredly connected to the first wheel axle 8.

[0069] Specifically, the transmission mechanism 7 serves to transmit power and can achieve outputs with different speed ratios. The transmission mechanism 7 includes a transmission shaft 71, which is used for power transmission, such as... Figure 1 As shown, the drive shaft 71 is connected to a first drive gear 711 and a second drive gear 712. The first drive gear 711 and the second drive gear 712 rotate together with the drive shaft 71. The first drive gear 711 can be poweredly connected to a gear ring 31. An input gear is provided on the outer circumference of the gear ring 31. The input gear can mesh the gear ring 31 with the first drive gear 711 to realize the power transmission between them. The transmission mechanism 7 also includes an output shaft 72 for power output. The output shaft 72 is connected to an output gear 721. The second drive gear 712 meshes with the output gear 721, that is, the two realize the power transmission between them through meshing. The output shaft 72 can be poweredly connected to the first wheel axle 8 through a differential or other mechanism, that is, the power at the output shaft 72 can be transmitted to the first wheel axle 8 through the differential.

[0070] In actual operation, after the first motor 2 drives the sun gear 33, planet gears 32, and ring gear 31 to rotate, the rotation of the ring gear 31 drives its input gear to rotate. The input gear meshes with the first transmission gear 711, causing the first transmission gear 711 to rotate. Simultaneously, this causes the transmission shaft 71 to rotate, which in turn drives the second transmission gear 712 to rotate. The second transmission gear 712 meshes with the output gear 721, causing the output gear 721 to rotate. Simultaneously, this causes the output shaft 72 to rotate, transmitting power through the differential to the first wheel axle 8, thus achieving electric drive of the wheel rotation. The differential can be configured as a disengaged differential, possessing an axial disengagement function. This allows for control of differential engagement or disengagement according to actual usage requirements, reducing drag or wear during vehicle operation and improving vehicle reliability under different road conditions.

[0071] The first transmission gear 711 and the second transmission gear 712 are respectively sleeved on the outside of the transmission shaft 71. The first transmission gear 711 and the second transmission gear 712 are spaced apart along the axial direction of the transmission shaft 71. The power at the first transmission gear 711 can be transmitted to the second transmission gear 712 through the transmission shaft 71, and the power at the second transmission gear 712 can be transmitted to the first transmission gear 711 through the transmission shaft 71.

[0072] In some embodiments, the powertrain 100 further includes a second wheel axle 9 and a second motor 10, wherein the first wheel axle 8 and the second wheel axle 9 are spaced apart longitudinally along the vehicle, and the second motor 10 is poweredly connected to the second wheel axle 9 to drive the second wheel axle 9 to rotate.

[0073] Specifically, the second wheel axle 9 is used to transmit power to the second wheel 91, and the second motor 10 is used to drive the second wheel axle 9 to rotate. The second wheel axle 9 and the first wheel axle 8 are spaced apart along the longitudinal direction of the vehicle, meaning their arrangement occupies the longitudinal direction. The second motor 10 is electrically connected to the second wheel axle 9. For example, the second motor 10 can be connected to the second wheel axle 9 via a reduction mechanism, allowing the power of the second motor 10 to be transmitted to the second wheel axle 9, thus driving the second wheel axle 9 to rotate. Furthermore, the second wheel axle 9 is connected to the second wheel 91, enabling the second motor 10 to electrically drive the second wheel 91 to rotate.

[0074] In this embodiment, one of the second wheel axle 9 and the first wheel axle 8 can be located in the front region of the vehicle's longitudinal direction, and the other can be located in the rear region of the vehicle's longitudinal direction. Figure 3 As shown, the first wheel axle 8 can be set as the front wheel axle and the second wheel axle 9 as the rear wheel axle. That is, the first wheel axle 8 can drive the front wheel to rotate, and the rotation of the second wheel axle 9 can drive the rear wheel to rotate.

[0075] Furthermore, the second motor 10 may be distributed separately from the first motor 2 along the longitudinal beam of the vehicle. The power transmission system 100 may include a battery 101, which is used to provide electrical energy to the first motor 2 and / or the second motor 10. The second motor 10 may be located at the rear of the vehicle and close to the second wheel axle 9 to facilitate the power connection between the second motor 10 and the second wheel axle 9.

[0076] Meanwhile, the engine 1, planetary gear mechanism 3, and first motor 2 can be located at the front of the vehicle and close to the first wheel axle 8. This allows the first motor 2 to drive the first wheel axle 8 to rotate, thus electrically driving the first wheel 81. This is a pure electric two-wheel drive mode. The battery 101 also supplies power to the second motor 10, which can be used independently to drive the second wheel 91. This is also a pure electric two-wheel drive mode. Furthermore, when the engine 1 generates electricity for the first motor 2, the energy generated by the first motor 2 can be output to the second motor 10 to drive the second wheel 91. In the two-wheel drive mode with power supply, the second motor 10 is powered by either battery 101 or the first motor 2. Both methods can meet the power requirements of the second motor 10. The energy generated by the first motor 2 can charge the battery 101 to keep the battery 101 fully charged. The first motor 2 can drive the first wheel 81 to rotate, and the second motor 10 can drive the second wheel 91 to rotate. Thus, the first motor 2 and the second motor 10 can drive the vehicle to run simultaneously. This is the pure electric four-wheel drive mode. In other words, the power transmission system 100 of this application has multiple drive modes, which can be flexibly selected according to the actual situation.

[0077] Thus, for new energy vehicles that primarily use electric drive and secondarily use fuel-powered generators, this application achieves both power generation and driving functions through the first motor 2, while the second motor 10 controls vehicle operation via electric drive, saving setup costs and balancing range, convenience, and economy.

[0078] This utility model also proposes a vehicle.

[0079] According to the vehicle of the present invention, a power transmission system 100 of any of the above embodiments is provided. The power transmission system 100 is applied to the vehicle. The power transmission system 100 includes an engine 1, a first motor 2, a planetary gear mechanism 3, and a first locking structure 4. By setting the planetary gear mechanism 3 to power connect the engine 1 and the first motor 2, the engine 1 can generate electricity for the first motor 2 through the planetary gear mechanism 3. The first motor 2 is also power connected to the first wheel axle 8 through the planetary gear mechanism 3, so that the first motor 2 can output power to the first wheel axle 8 through the planetary gear mechanism 3, thereby driving the wheel to rotate. In this way, the power generation and driving functions of the first motor 2 can be realized. By sharing a single motor for power generation and driving, and sharing a single planetary gear mechanism 3 as a speed-up / deceleration mechanism, the number of parts in the power transmission system 100 is reduced, making the overall structure compact. This results in a smaller footprint in the vehicle and reduces the overall weight and installation cost. Furthermore, the first locking structure 4 and the clutch structure 5 make the power distribution between the engine 1, the planetary gear mechanism 3, and the first motor 2 more stable and reliable, which is conducive to switching between different driving modes for vehicle driving.

[0080] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do 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 one or more embodiments or examples.

[0081] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A power transmission system characterized by, include: Engine and first electric motor; A planetary gear mechanism, comprising a ring gear, planet gears and a sun gear, wherein the planet gears mesh between the ring gear and the sun gear, and the ring gear is used for selective power connection with a first wheel axle; The engine is adapted to selectively transmit power through the planetary gears and the sun gear to the first motor for generating electricity, and the first motor is adapted to selectively output power through the sun gear, the planetary gears and the ring gear.

2. The power transmission system of claim 1, wherein, It also includes a first locking structure for selectively fixing the gear ring to the housing of the power transmission system.

3. The power transmission system of claim 1, wherein, It also includes a clutch structure, wherein the planetary gears are connected to a planetary carrier, the clutch structure is connected between the planetary carrier and the engine, and is used to power the engine and the planetary carrier.

4. The power transmission system of claim 3, wherein, The clutch structure is constructed as a one-way clutch, which is used to transmit the power of the engine to the planetary carrier in one direction.

5. The power transmission system of claim 3, wherein, It also includes a second locking structure, which is used to fix the planetary carrier to the housing of the power transmission system when the first motor outputs power.

6. The power transmission system of claim 5, wherein, The engine and the second locking structure are respectively located on both sides of the planetary carrier.

7. The power transmission system of claim 1, wherein, The engine and the first motor are respectively located on both sides of the planetary gear mechanism.

8. The power transmission system of claim 1, wherein, It also includes a transmission mechanism, which includes a transmission shaft and an output shaft. The transmission shaft is provided with a first transmission gear and a second transmission gear. The gear ring is poweredly connected to the first transmission gear. The output shaft is provided with an output gear. The second transmission gear meshes with the output gear, and the output shaft is poweredly connected to the first wheel axle.

9. The power transmission system of claim 1, wherein, It also includes a second wheel axle and a second motor, the first wheel axle and the second wheel axle being spaced apart along the longitudinal direction of the vehicle, and the second motor being poweredly connected to the second wheel axle to drive the second wheel axle to rotate.

10. A vehicle characterized by comprising: The system is provided with any one of claims 1-9.

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