CN221188120U - Power transmission system and vehicle - Google Patents

Abstract

The utility model discloses a power transmission system and a vehicle, wherein the power transmission system comprises: a first wheel and a second wheel; a first motor, a range extender, and a planetary gear mechanism for dynamically connecting the first motor with the range extender and for dynamically connecting the first motor and/or the range extender with the first wheel or with the first wheel and the second wheel simultaneously; and a second motor disposed in power connection with the second wheel or with both the first wheel and the second wheel. According to the power transmission system, the first motor and/or the range extender can drive two wheels by using the planetary gear mechanism, the first motor can generate power, and then three motors are matched to drive four wheels respectively, so that the escaping capability is improved, the setting of a generator can be reduced, and when the first motor generates power, each wheel can still be effectively driven, and the power performance of a vehicle is improved.

Description

Power transmission system and vehicle

Technical Field

The utility model relates to the technical field of vehicle manufacturing, in particular to a power transmission system and a vehicle with the power transmission system.

Background

With the continuous penetration of new energy technologies, more and more vehicle enterprises have own new energy routes, in off-road vehicles, traditional ICE (internal combustion engine) power causes higher oil consumption due to a large-displacement engine, future oil consumption regulations are difficult to meet, and each vehicle enterprise is exploring new energy technology routes of the off-road vehicles. In the related art, an independent motor is matched with a range extender to be used for realizing power generation, the motor is more in number and high in setting cost, the escaping capability of each wheel is low, the wheel cannot adapt to relatively complex road conditions, and there is room for improvement.

Disclosure of utility model

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides a power transmission system, wherein the first motor and/or the range extender can drive two wheels by using a planetary gear mechanism, the escaping capability is improved, the first motor can generate electricity, and one of the motors can be used as the range extender motor, so that the setting cost is reduced.

A drivetrain according to an embodiment of the present utility model includes: a first wheel and a second wheel; a first motor, a range extender, and a planetary gear mechanism for dynamically connecting the first motor with the range extender and for dynamically connecting the first motor and/or the range extender with the first wheel or with the first wheel and the second wheel simultaneously; and a second motor disposed in power connection with the second wheel or with both the first wheel and the second wheel.

According to the power transmission system provided by the embodiment of the utility model, the first motor and/or the range extender can drive two wheels by utilizing the planetary gear mechanism, the first motor can generate power, and three motors are matched to drive four wheels respectively, so that the escaping capability of the whole vehicle is improved, the setting of an independent generator can be reduced, the effective driving of each wheel can be ensured when the first motor generates power, the dynamic property of the vehicle in the power generation process is ensured, and the first motor and the second motor can both drive the first wheel and the second wheel, so that the dynamic property of the vehicle in pure electric driving is enhanced.

According to some embodiments of the utility model, the planetary gear mechanism comprises a planet carrier, a planet wheel, a sun wheel and a gear ring, wherein the sun wheel is positioned in the gear ring, the planet wheel is positioned between the sun wheel and the gear ring and meshed with the sun wheel and the gear ring respectively, the planet wheel is rotatably connected to the planet carrier, the first motor is connected with the sun wheel, the range extender is connected with the planet carrier, and the gear ring is connected with the first wheel or the first wheel and the second wheel in a power mode.

A drivetrain according to some embodiments of the present utility model further includes a differential, the first wheel having a first axle connected thereto, the second wheel having a second axle connected thereto, the differential being in dynamic connection with the first axle and the second axle, respectively;

Wherein the ring gear is selectively in power connection with the first axle and the differential, and the second electric machine is selectively in power connection with the second axle and the differential.

The power transmission system according to some embodiments of the present utility model further includes a first input shaft in power connection with the ring gear, the first input shaft being provided with a first transmission gear, a second transmission gear and a first synchronizer for in power connection with the first input shaft and the first transmission gear or the second transmission gear;

The first wheel axle is provided with a first output gear meshed with the first transmission gear, and the differential is provided with a differential gear meshed with the second transmission gear;

And/or, the motor driving device further comprises a second input shaft, wherein the second input shaft is in power connection with the second motor, the second input shaft is provided with a third transmission gear, a fourth transmission gear and a second synchronizer, and the second synchronizer is used for dynamically connecting the second input shaft with the third transmission gear or the fourth transmission gear;

The second wheel axle is provided with a second output gear meshed with the third transmission gear, and the differential is provided with a differential gear meshed with the fourth transmission gear.

According to some embodiments of the utility model, the first input shaft is provided with a first input gear, which meshes with the ring gear.

According to some embodiments of the utility model, the axis of the first axle coincides with the axis of the second axle, and the first motor and the second motor are located on the front and rear sides of the first axle, respectively.

A drivetrain according to some embodiments of the present utility model, further comprising: a third wheel, a fourth wheel, a third motor, and a fourth motor;

The third wheel is connected with a third wheel shaft, the third wheel shaft is provided with a third output gear, the third motor is provided with a third motor gear, the third motor gear is in power connection with the third output gear through a gear set, the fourth wheel is connected with a fourth wheel shaft, the fourth wheel shaft is provided with a fourth output gear, the fourth motor is provided with a fourth motor gear, and the fourth motor gear is in power connection with the fourth output gear through the gear set.

According to some embodiments of the utility model, the first and second wheels are each provided as front wheels, and the third and fourth wheels are each provided as rear wheels;

and/or, the third motor and the fourth motor are both positioned behind the rear wheel axle.

According to some embodiments of the utility model, the range extender and the first motor are both located in front of the front axle, and the second motor is located between the front axle and the rear axle.

The utility model further provides a vehicle.

According to an embodiment of the utility model, a vehicle is provided with a drivetrain according to any one of the embodiments described above.

The advantages of the vehicle and the above-described driveline over the prior art are the same and are not described in detail herein.

Additional aspects and advantages of the utility model 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 utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic diagram of a powertrain system according to an embodiment of the present utility model;

fig. 2 is a schematic diagram of a powertrain system according to an embodiment of the present utility model.

Reference numerals:

The power train system 100 is configured such that,

The first wheel 11, the second wheel 12, the third wheel 13, the fourth wheel 14,

The first motor 21, the second motor 22, the second motor gear 221, the third motor 23, the third motor gear 231, the fourth motor 24, the fourth motor gear 241, the range extender 25,

A first wheel axle 31, a first output gear 311, a second wheel axle 32, a second output gear 321, a third wheel axle 33, a third output gear 331, a fifth transmission gear 332, a sixth transmission gear 333, a fourth wheel axle 34, a fourth output gear 341, a seventh transmission gear 342, an eighth transmission gear 343, a first input shaft 35, a first input gear 351, a first transmission gear 352, a second transmission gear 353, a second input shaft 36, a second input gear 361, a third transmission gear 362, a fourth transmission gear 363,

The first synchronizer 41, the second synchronizer 42,

Differential 5, differential gear 51, planetary gear mechanism 6, carrier 61, planet gears 62, sun gear 63, ring gear 64.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

If not specified, the front-rear direction in the application is the longitudinal direction of the vehicle, namely the X direction; the left-right direction is the transverse direction of the vehicle, namely the Y direction; the up-down direction is the vertical direction of the vehicle, i.e., the Z direction.

The following describes a power transmission system 100 according to an embodiment of the present utility model with reference to fig. 1 to 2, by providing the power transmission system 100, four wheels of a vehicle can be driven independently, so that each wheel has independent escaping capability, and at the same time, a motor corresponding to one of the wheels can be used as a range extender motor to be matched with the range extender 25, and a separate generator is not required to be provided for being matched with the range extender 25, thereby reducing the number of motors and reducing the setting cost.

As shown in fig. 1-2, a powertrain 100 according to one embodiment of the present utility model includes: a first wheel 11, a second wheel 12, a first motor 21, a range extender 25, a planetary gear mechanism 6 and a second motor 22.

The first wheel 11 and the second wheel 12 are two wheels of the vehicle, in other words, the power transmission system 100 of the present embodiment is applicable to a four-wheel vehicle type or a three-wheel vehicle type, in the present embodiment, the application is exemplified by a four-wheel vehicle type, that is, one of the first wheel 11 and the second wheel 12 is a front left wheel, one of the second wheel is a front right wheel, or one of the first wheel and the second wheel is a rear left wheel, and one of the second wheel is a rear right wheel, that is, the first wheel 11 and the second wheel 12 can be flexibly paired with the front left wheel and the front right wheel or with the rear left wheel and the rear right wheel in practical design, that is, the first wheel 11 is not limited to the front left wheel, but can be other wheels, and other wheels are similar and are flexibly selectable.

The planetary gear mechanism 6 is used for connecting the first motor 21 and the range extender 25 in a power way, and is used for connecting the first motor 21 and/or the range extender 25 and the first wheel 11 or simultaneously connecting the first wheel 11 and the second wheel 12 in a power way, that is, the first motor 21 and the range extender 25 are in a power communication state through the planetary gear mechanism 6, so that the power driving of the range extender 25 to the first motor 21 is realized, for example, the planetary gear mechanism 6 is connected between the range extender 25 and the first motor 21. The range extender 25 may be an engine, and when the engine is in power connection with the first motor 21, the engine may drive the planetary gear mechanism 6 to generate power for the first motor 21, and the engine may drive the first wheel 11 alone or drive the first wheel 11 and the second wheel 12 simultaneously through the planetary gear mechanism 6, and the first motor 21 may be used to drive the first wheel 11 alone or drive the first wheel 11 and the second wheel 12 simultaneously, so as to facilitate increasing the usage of the first motor 21. Therefore, the first motor 21 in this embodiment can be used to cooperate with the range extender 25 to perform active power generation, and can also be used to drive the first wheel 11 alone or to drive the first wheel 11 and the second wheel 12 to rotate simultaneously, so as to realize a multi-purpose arrangement.

It should be noted that, the range extender 25 may be connected to the planet carrier 61 of the planetary gear mechanism 6, the first motor 21 may be connected to the sun gear 63 of the planetary gear mechanism 6, or the range extender 25 may be connected to the ring gear 64 of the planetary gear mechanism 6, the first motor 21 may be connected to the sun gear 63 of the planetary gear mechanism 6, or the range extender 25 may be connected to the sun gear 63 of the planetary gear mechanism 6, the first motor 21 may be connected to the planet carrier 61 of the planetary gear mechanism 6, and the three arrangements may all achieve driving of the range extender 25 to the first motor 21, and driving of the range extender 25 or the first motor 21 to the first wheel 11 and the second wheel 12, so the connection modes between the range extender 25 and the first motor 21 and the planetary gear mechanism 6 may be multiple and may be flexibly selected.

The second motor 22 is arranged in power connection with the second wheel 12 or with both the first wheel 11 and the second wheel 12, i.e. the second motor 22 may be used for driving the second wheel 12 alone or for driving both the first wheel 11 and the second wheel 12, which facilitates an increased use of the second motor 22. Thus, in actual operation, when the first motor 21 drives the first wheel 11 alone, the second motor 22 drives the second wheel 12 alone, thereby achieving simultaneous driving of the first wheel 11 and the second wheel 12, or when the first motor 21 drives the first wheel 11 and the second wheel 12 simultaneously, the second motor 22 drives the first wheel 11 and the second wheel 12 simultaneously, thereby flexibly selecting the power states of the first wheel 11 and the second wheel 12, and achieving power switching in different modes.

It should be noted that, the first motor 21 and the second motor 22 may both drive the first wheel 11 and the second wheel 12 by power, that is, the first wheel 11 and the second wheel 12 may be two wheels facing each other in the lateral direction, for example, the first wheel 11 and the second wheel 12 may be two front wheels, or the first wheel 11 and the second wheel 12 may be two rear wheels, so as to facilitate the path arrangement and power transmission from the first motor 21 and the second motor 22 to the wheels.

Therefore, the first wheel 11 and the second wheel 12 in the embodiment can be driven by separate motors, the two rear wheels can be driven to rotate, a front driving mode is realized, and the two motors can be arranged to drive the two rear wheels respectively, so that each wheel rotates, the overall escaping capability of the vehicle is improved, the vehicle is suitable for different types of running road conditions, and the power performance of the vehicle is improved; meanwhile, the first motor 21 can be used for driving the first wheel 11 to carry out power driving, and can be used as a generator to carry out power matching with the range extender 25, so that the arrangement of two functions of the same motor is realized, the arrangement of an independent power generator is reduced, the arrangement cost is reduced, and when the first motor 21 is used as a generator to operate, the second motor 22 can simultaneously carry out power driving on the first wheel 11 and the second wheel 12, so that the problem that the first wheel 11 cannot be effectively driven when the first motor 21 is used for power generation can be well avoided, the power state of each wheel is ensured, the first motor 21 is not required to be simultaneously used for generating and driving, the working difficulty of the first motor 21 is reduced, and the reliability of the power transmission system 100 is ensured. And, when the first motor 21 and the second motor 22 actively drive the first wheel 11 and the second wheel 12 at the same time, the power performance of the first wheel 11 and the second wheel 12 can be enhanced.

According to the power transmission system 100 of the embodiment of the utility model, the first motor 21 and/or the range extender 25 can drive two wheels by using the planetary gear mechanism 6, and can generate power for the first motor 21, and then cooperate with three motors to drive four wheels respectively, so that the escaping capability of the whole vehicle is improved, the setting of an independent generator can be reduced, and when the first motor 21 generates power, the effective driving of each wheel can be ensured, the dynamic performance of the vehicle in the power generation process is ensured, and the first motor 21 and the second motor 22 can both drive the first wheel 11 and the second wheel 12, so that the dynamic performance of the pure electric vehicle is enhanced.

In some embodiments, the planetary gear mechanism 6 includes a planet carrier 61, a planet gear 62, a sun gear 63 and a ring gear 64, the sun gear 63 is located in the ring gear 64, the planet gear 62 is located between the sun gear 63 and the ring gear 64 and meshed with the sun gear 63 and the ring gear 64, respectively, the planet gear 62 is rotatably connected to the planet carrier 61, in practical design, the ring gear 64 is located at the outermost side of the planetary gear mechanism 6, the sun gear 63 is located inside the ring gear 64, a plurality of planet gears 62 are located between the ring gear 64 and the sun gear 63, and meshed with the ring gear 64 and the sun gear 63 respectively, so that power transmission between the ring gear 64, the planet gears 62 and the sun gear 63 can be achieved, power can be transmitted from the ring gear 64 to the sun gear 63, or transmitted from the sun gear 63 to the ring gear 64, and the plurality of planet gears 62 are rotatably connected with the planet carrier 61, that is, the planet carrier 61 can be located at one side of the planet carrier 61 in the axial direction, wherein the rotation centers of the ring gear 64, the planet carrier 61 and the sun gear 63 can be identical.

The first electric machine 21 is connected to the sun gear 63, the range extender 25 is connected to the planet carrier 61, and the ring gear 64 is in power connection with the first wheel 11 or with both the first wheel 11 and the second wheel 12. That is, the range extender 25 may transmit power to the carrier 61, a portion of the power to the first motor 21 through the sun gear 63, and another portion of the power to the first wheel 11 through the ring gear 64 or to both the first wheel 11 and the second wheel 12.

As shown in fig. 1, the range extender 25 and the first motor 21 are located at two axial sides of the planetary gear mechanism 6, the output end of the range extender 25 is fixedly connected with the planet carrier 61 at one side of the planetary gear mechanism 6, and the sun gear 63 is fixedly sleeved on the motor shaft of the first motor 21, when the range extender 25 outputs driving force, the driving force can be transmitted to the sun gear 63 through the planet carrier 61 and the planet gear 62 and then transmitted to the first motor 21 through the sun gear 63, so that the driving of the first motor 21 is realized, and the power generation process is further realized.

And the ring gear 64 is in power connection with the first wheel 11, or the ring gear 64 is in power connection with both the first wheel 11 and the second wheel 12, whereby the first motor 21 or the range extender 25 can achieve power output to the first wheel 11 and the second wheel 12 through the ring gear 64.

When the first motor 21 is driven to generate power, the range extender 25 drives the first wheel 11 to rotate through the gear ring 64 or simultaneously drives the first wheel 11 and the second wheel 12 to rotate, so that the range extender 25 is in two working modes, the range extender 25 drives the first wheel 11 alone or simultaneously drives the first wheel 11 and the second wheel 12 to rotate, when the first motor 21 does not need to generate power, the range extender 25 jointly drives the gear ring 64 through the planet carrier 61 and the first motor 21 to output driving force to the outside through the sun gear 63, the driving force is transmitted to the first wheel 11 or simultaneously transmitted to the first wheel 11 and the second wheel 12, the rotation of the first wheel 11 and the second wheel 12 is realized, and when the first motor 21 and the range extender 25 simultaneously output the driving force, the power performance of the first wheel 11 and the second wheel 12 can be enhanced.

In some embodiments, the powertrain 100 further includes a differential 5, the first wheel 11 is coupled to the first axle 31, the second wheel 12 is coupled to the second axle 32, the differential 5 is in power connection with the first axle 31 and the second axle 32, respectively, as shown in fig. 1, the differential 5 is located between the first axle 31 and the second axle 32, and the differential 5 may be in power connection with both the first axle 31 and the second axle 32.

The ring gear 64 is selectively in power connection with the first wheel axle 31 and the differential 5, i.e. the ring gear 64 may be in power connection with either the first wheel axle 31 or the differential 5. Specifically, ring gear 64 may be used to drive first wheel 11 in rotation alone when ring gear 64 is in power connection with first axle 31, and ring gear 64 may be used to drive first wheel 11 and second wheel 12 in rotation when ring gear 64 is in power connection with differential 5. Likewise, the second electric machine 22 is selectively in power connection with the second axle 32 and the differential 5, and the second electric machine 22 may be in power connection with either the second axle 32 or the differential 5. Specifically, the second motor 22 may be used to drive the second wheel 12 alone for rotation when the second motor 22 is in power connection with the second axle 32, and the second motor 22 may be used to drive the first wheel 11 and the second wheel 12 for rotation when the second motor 22 is in power connection with the differential 5, and this mode is a pure electric front drive mode when the range extender 25 and the first motor 21 are not operating.

And when specifically designed, the first wheel axle 31 and the second wheel axle 32 may be simultaneously provided as front side wheel axles, or may be simultaneously provided as rear side wheel axles, for example, one of the first wheel axle 31 and the second wheel axle 32 is provided as a left front wheel axle, and the other is provided as a right front wheel axle, and the differential 5 is provided between the left front wheel axle and the right front wheel axle, so that when the power of the ring gear 64 or the second motor 22 is transmitted to the differential 5, the power may be output from the differential 5 to the first wheel 11 and the second wheel 12, respectively. Specifically, as shown in FIG. 1, the ring gear 64 is selectively in operative connection with the right front axle, and the second electric machine 22 is selectively in operative connection with the left front axle.

In some embodiments, the power transmission system 100 further includes a first input shaft 35, the first input shaft 35 is in power connection with the ring gear 64, the first input shaft 35 is provided with a first transmission gear 352, a second transmission gear 353 and a first synchronizer 41, the first synchronizer 41 is used to power connect the first input shaft 35 with the first transmission gear 352 or the second transmission gear 353, that is, the ring gear 64 can transmit power to the first input shaft 35, and the power can be flexibly input from the first input shaft 35 to the first transmission gear 352 or the second transmission gear 353 by switching the state of the first synchronizer 41.

The first wheel shaft 31 is provided with a first output gear 311 meshed with a first transmission gear 352, as shown in fig. 1, the first wheel shaft 31 is sleeved with the first output gear 311, and the first output gear 311 is in circumferential transmission fit with the first wheel shaft 31, so that when the first synchronizer 41 connects the first transmission gear 352 with the first input shaft 35 in a power mode, power on the first motor 21 can be transmitted to the first wheel shaft 31 through the first input shaft 35, the first transmission gear 352 and the first output gear 311, and further the first wheel 11 is independently driven to rotate. And, the differential 5 is provided with a differential gear 51 engaged with the second transmission gear 353, as shown in fig. 1, the differential gear 51 is arranged outside the housing of the differential 5, and the differential gear 51 is integral with the housing of the differential 5, so that when the first synchronizer 41 connects the second transmission gear 353 with the first input shaft 35 in a power manner, the power on the first motor 21 can be transmitted to the differential 5 through the first input shaft 35, the second transmission gear 353 and the differential gear 51, and then transmitted from the differential 5 to the first wheel axle 31 and the second wheel axle 32 respectively, thereby realizing the common driving of the first wheel 11 and the second wheel 12.

Thus, the gear ring 64 can realize the switching of the power output state by the cooperation of the first transmission gear 352, the second transmission gear 353 and the first synchronizer 41 on the first input shaft 35, and flexibly select to drive the first wheel 11 alone or drive the first wheel 11 and the second wheel 12 simultaneously. It should be noted that, when the first synchronizer 41 has three working positions, as shown in fig. 1, the first synchronizer 41 is located on the right side, the first synchronizer may be combined with the first transmission gear 352, and when it is located on the left side, the first synchronizer 41 may be combined with the second transmission gear 353, and when the first synchronizer 41 is located on the middle position, the power of the first motor 21 is not output from the first input shaft 35, and at this time, the range extender 25 may be in power connection with the first motor 21, so that the range extender 25 is used to drive the first motor 21 to operate and start to generate power.

And, in other embodiments, as shown in fig. 2, the first input shaft 35 may be provided with only the first transmission gear 352 and the first synchronizer 41, that is, after the first synchronizer 41 is combined with the first transmission gear 352, the power of the first input shaft 35 may be transmitted to the first axle 31, so that the first motor 21 alone drives the first wheel 11, while the power of the first motor 21 cannot be transmitted to the differential 5, that is, the first motor 21 cannot simultaneously drive the first wheel 11 and the second wheel 12, so that the second motor 22 needs to separately drive the second wheel 12, or simultaneously drive the first wheel 11 and the second wheel 12, in other words, the second motor 22 needs to be in an operating state to implement the front driving mode of the vehicle.

In some embodiments, the power transmission system 100 further includes a second input shaft 36, the second input shaft 36 is in power connection with the second motor 22, the second input shaft 36 is provided with a third transmission gear 362, a fourth transmission gear 363 and a second synchronizer 42, the second synchronizer 42 is used to power connect the second input shaft 36 with the third transmission gear 362 or the fourth transmission gear 363, that is, the second motor 22 can transmit power to the second input shaft 36, and the power can be flexibly input from the second input shaft 36 to the third transmission gear 362 or the fourth transmission gear 363 by switching the state of the second synchronizer 42.

The second wheel axle 32 is provided with a second output gear 321 meshed with a third transmission gear 362, as shown in fig. 1, the second wheel axle 32 is sleeved with the second output gear 321, and the second output gear 321 is in circumferential transmission fit with the second wheel axle 32, so that when the second synchronizer 42 connects the third transmission gear 362 with the second input shaft 36 in a power manner, the power on the second motor 22 can be transmitted to the second wheel axle 32 through the second input shaft 36, the third transmission gear 362 and the second output gear 321, and further the second wheel 12 is independently driven to rotate. And, the differential 5 is provided with a differential gear 51 meshed with the fourth transmission gear 363, as shown in fig. 1, the differential gear 51 is arranged outside the housing of the differential 5, the differential gear 51 can be meshed with the fourth transmission gear 363, and the differential gear 51 is integrated with the housing of the differential 5, so that when the second synchronizer 42 connects the fourth transmission gear 363 with the second input shaft 36 in a power manner, the power on the second motor 22 can be transmitted to the differential 5 through the second input shaft 36, the fourth transmission gear 363 and the differential gear 51, and then transmitted from the differential 5 to the first wheel axle 31 and the second wheel axle 32 respectively, thereby realizing the common driving of the first wheel 11 and the second wheel 12.

Thus, the second motor 22 can realize the switching of the power output state through the cooperation of the third transmission gear 362, the fourth transmission gear 363 and the second synchronizer 42 on the second input shaft 36, and flexibly select to drive the first wheel 11 alone or drive the first wheel 11 and the second wheel 12 simultaneously. It should be noted that, the second synchronizer 42 has three working positions, as shown in fig. 1, when the second synchronizer 42 is located on the right side, the coupling with the fourth transmission gear 363 is achieved, and when it is located on the left side, the coupling with the third transmission gear 362 is achieved, and when the second synchronizer 42 is located at the middle position, the power of the second motor 22 is not output from the second input shaft 36.

In some embodiments, the first input shaft 35 is provided with a first input gear 351, the first input gear 351 is meshed with the gear ring 64, specifically, as shown in fig. 1, the sun gear 63 is fixedly sleeved on a motor shaft of the first motor 21, so that when the first motor 21 rotates, the sun gear 63 can rotate along with the first input gear 351, and the sun gear 63 drives the gear ring 64 to rotate, meanwhile, the gear ring 64 and the first input gear 351 are meshed to drive the first input gear 351 to rotate, wherein the first input gear 351 is fixedly connected with the first input shaft 35 in a circumferential direction, so that the first input gear 351 drives the first input shaft 35 to rotate, and further power output of the first motor 21 is achieved.

Thus, by providing the driving engagement of the ring gear 64 and the first input gear 351, not only can the power transmission from the first motor 21 to the first input shaft 35 be achieved, but also the first motor 21 and the first input shaft 35 can be sequentially distributed in the longitudinal direction of the vehicle, thereby reasonably utilizing the space of the vehicle in the longitudinal direction and avoiding excessively compact structural installation in the lateral direction.

In some embodiments, the second motor 22 is provided with a second motor gear 221, the second input shaft 36 is provided with a second input gear 361, the second input gear 361 is meshed with the second motor gear 221, specifically, as shown in fig. 1, the second motor gear 221 is fixedly sleeved on a motor shaft of the second motor 22, so that when the second motor 22 rotates, the second motor gear 221 can rotate along with the motor shaft, meanwhile, the second motor gear 221 and the second input gear 361 are meshed to drive the second input gear 361 to rotate, wherein the second input gear 361 is fixedly connected with the second input shaft 36 in a circumferential direction, so that the second input gear 361 drives the second input shaft 36 to rotate, and further power output of the second motor 22 is achieved.

Therefore, by arranging the transmission fit of the second motor gear 221 and the second input gear 361, not only can the power transmission from the second motor 22 to the second input shaft 36 be realized, but also the second motor 22 and the second input shaft 36 can be sequentially distributed in the longitudinal direction of the vehicle, so that the space of the vehicle in the longitudinal direction is reasonably utilized, and the excessively compact structural installation in the transverse direction is avoided.

In some embodiments, the axis of the first axle 31 coincides with the axis of the second axle 32. I.e. the first axle 31 and the second axle 32 are arranged facing each other in the transverse direction of the vehicle, in other words one of the first axle 31 and the second axle 32 may be arranged as a left front axle and the other as a right front axle, or one of the first axle 31 and the second axle 32 may be arranged as a left rear axle and the other as a right rear axle, i.e. for enabling driving of the front two wheels, or for enabling driving of the rear two wheels.

And the first motor 21 and the second motor 22 are located on the front and rear sides of the second wheel axle 32, respectively, wherein the second wheel axle 32 extends in the lateral direction of the vehicle, whereby the first motor 21 may be located on the front side of the second wheel axle 32 and the second motor 22 may be located on the rear side of the second wheel axle 32, or the first motor 21 may be located on the rear side of the second wheel axle 32 and the second motor 22 may be located on the front side of the second wheel axle 32. Specifically, as shown in fig. 1, the first axle 31 is a right front axle, the second axle 32 is a left front axle, and the first motor 21 is located in front of the second axle 32, and the second motor 22 is located behind the second axle 32, so that the first motor 21 and the second motor 22 can utilize the space in the front-rear direction of the second axle 32, respectively, so that the arrangement of the first motor 21 and the second motor 22 is relatively dispersed, and is not excessively compact.

In some embodiments, the powertrain 100 further includes: the third wheel 13, the fourth wheel 14, the third motor 23 and the fourth motor 24, the third wheel 13 and the fourth wheel 14 are respectively two wheels of the vehicle, and can be two rear wheels of the vehicle, namely one is a left rear wheel and one is a right rear wheel, that is, when actually designed, the first wheel 11, the second wheel 12, the third wheel 13 and the fourth wheel 14 can be flexibly matched with a left front vehicle, a right front wheel, a left rear wheel and a right rear wheel for use, namely, the first wheel 11 is not limited to the left front wheel, can be other wheels, and the other wheels are similar and are flexibly and selectively arranged.

The third wheel 13 is connected with a third wheel shaft 33, the third wheel shaft 33 is provided with a third output gear 331, the third motor 23 is provided with a third motor gear 231, and the third motor gear 231 is in power connection with the third output gear 331 through a gear set. The third motor gear 231 is a motor shaft fixedly sleeved on the third motor 23, so that the driving force output by the third motor 23 can be sequentially output to the third wheel shaft 33 through the third motor gear 231, the gear set and the third output gear 331, and the power output to the third wheel 13 is realized.

Wherein, the gear set between the third motor gear 231 and the third output gear 331 may include a fifth transmission gear 332 and a sixth transmission gear 333, the fifth transmission gear 332 and the sixth transmission gear 333 are coaxially arranged, and the third motor gear 231 is engaged with the fifth transmission gear 332, the third output gear 331 is engaged with the sixth transmission gear 333, and by providing power transmission of the fifth transmission gear 332 and the sixth transmission gear 333, a speed ratio change from the third motor gear 231 to the third output gear 331, an adjustment of power output of the third motor 23, and a gear steering of the third motor gear 231 to the third output gear 331 may be realized.

And, the fourth wheel 14 is connected with a fourth wheel axle 34, the fourth wheel axle 34 is provided with a fourth output gear 341, the fourth motor 24 is provided with a fourth motor gear 241, and the fourth motor gear 241 is in power connection with the fourth output gear 341 through a gear set. The fourth motor gear 241 is fixedly sleeved on the motor shaft of the fourth motor 24, so that the driving force output by the fourth motor 24 can be sequentially output to the fourth wheel shaft 34 through the fourth motor gear 241, the gear set and the fourth output gear 341, so as to realize the power output of the fourth wheel 14.

Wherein, the gear set between the fourth motor gear 241 and the fourth output gear 341 may include a seventh transmission gear 342 and an eighth transmission gear 343, the seventh transmission gear 342 and the eighth transmission gear 343 are coaxially arranged, and the fourth motor gear 241 is engaged with the seventh transmission gear 342, the fourth output gear 341 is engaged with the eighth transmission gear 343, and by providing power transmission of the seventh transmission gear 342 and the eighth transmission gear 343, a speed ratio change of the fourth motor gear 241 to the fourth output gear 341, an adjustment of the power output of the fourth motor 24, and a gear steering of the fourth motor gear 241 to the fourth output gear 341 may be realized.

Thus, the present embodiment further includes a pure electric rear-drive mode and a hybrid mode, where the third motor 13 and the fourth motor 14 drive the two rear wheels simultaneously, and the two front wheels are driven by the range extender 25 and/or the first motor 21 and the second motor 22 respectively to realize a hybrid four-drive mode, and when the second motor 12 does not operate, the two front wheels are driven by the range extender 25 and/or the first motor 21 to rotate, so as to realize another hybrid four-drive mode, and when the third motor 13 and the fourth motor 14 do not operate, the hybrid front wheels are driven by the range extender 25 and/or the first motor 21 to rotate.

In some embodiments, the first wheel 11 and the second wheel 12 are each provided as front wheels, the third wheel 13 and the fourth wheel 14 are each provided as rear wheels, the first motor 21 and the second motor 22 may be used to drive the two front wheels to rotate, and the third motor 23 and the fourth motor 24 may be used to drive the two rear wheels to rotate.

Specifically, as shown in fig. 1, the first wheel 11 is a right front wheel, the second wheel 12 is a left front wheel, the third wheel 13 is a right rear wheel, the fourth wheel 14 is a left rear wheel, correspondingly, the first wheel axle 31 is a right front wheel axle, the second wheel axle 32 is a left front wheel axle, the third wheel axle 33 is a right rear wheel axle, and the fourth wheel axle 34 is a left rear wheel axle.

Therefore, the first motor 21 can be used for driving the front right wheel to rotate, and can also be used for matching with the range extender 25 to realize power generation, meanwhile, the second motor 22 can be used for driving the front left wheel to rotate, and can also simultaneously drive the front left wheel and the front right wheel to rotate, the third motor 23 is used for driving the rear right wheel to rotate, and the fourth motor 24 is used for driving the rear left wheel to rotate, so that the four wheels can be respectively driven to rotate through the four motors, the structure is simple, and the escape capability of the whole vehicle can be improved.

In some embodiments, the third motor 23 and the fourth motor 24 are located behind the rear axle, that is, the third motor 23 and the fourth motor 24 are located in the rear region of the vehicle, so that not only is the space between the third motor 23 and the third axle 33 reduced, but also the space between the fourth motor 24 and the fourth axle 34 is reduced, and the rear space of the vehicle can be better utilized, it is understood that the longitudinal length of the middle space is greater than the space of the front region and greater than the space of the rear region in the longitudinal direction of the vehicle, and the third motor 23 and the fourth motor 24 are spaced apart from the middle region of the vehicle, so that the central region of the vehicle is prevented from being excessively compact in structure, so that the main components of the powertrain 100 can be more greatly utilized in the longitudinal space of the vehicle, so that the compactness of each part of the vehicle is relatively balanced, and reasonable arrangement of the positions of each component is achieved.

In this embodiment, the two rear axles are provided with differential locks to lock the two rear axles, so that the torques of the two rear axles under specific conditions are guaranteed to be the same, the two rear axles can be provided with no differential locks, meanwhile, the two front axles can be provided with differential locks, and whether the front axles and the rear axles of the vehicle need to be provided with differential locks or not can be matched according to the needs of the whole vehicle, and the vehicle can be flexibly selected.

In some embodiments, the range extender 25 and the first motor 21 are both located in front of the front axle, the second motor 22 is located between the front axle and the rear axle, i.e., in this embodiment, the first axle 31 and the second axle 32 are both front axles, the first axle 31 is the right front axle, the second axle 32 is the left front axle, while the third axle 33 and the fourth axle 34 are both rear axles, the third axle 33 is the right rear axle, and the fourth axle 34 is the left rear axle.

Therefore, the range extender 25 and the first motor 21 are both positioned in the front area of the vehicle, which is beneficial to shortening the power transmission path between the first motor 21 and the first wheel axle 31, and simultaneously, the power transmission part between the range extender 25 and the first motor 21 can be reduced, so that the arrangement of effective power generation and driving is realized. Meanwhile, the second motor 22 is located in the middle area of the vehicle, so that a short power path between the second motor 22 and the second wheel axle 32 can be kept, the second motor 22 is not required to be compactly installed in the front area of the vehicle together with the range extender 25 and the first motor 21, the middle space of the vehicle is well utilized, and the crowding of the front area of the vehicle is avoided.

It should be noted that, the present embodiment further includes a braking energy recovery mode to recover the redundant energy during the running of the vehicle for the subsequent running of the vehicle.

The utility model further provides a vehicle.

According to the vehicle of the embodiment of the utility model, the power transmission system 100 of any one of the embodiments described above is provided. In some specific embodiments, as shown in fig. 1, the vehicle is provided with a left front wheel, a right front wheel, a left rear wheel and a right rear wheel, wherein the first motor 21 is in power connection with the range extender 25 through the planetary gear mechanism 6, and the first motor 21 is selectively in power connection with the right front wheel through the ring gear 64, the first motor 21 is also selectively in power connection with the differential 5 through the ring gear 64, while the second motor 22 is selectively in power connection with the left front wheel, and the second motor 22 is also selectively in power connection with the differential 5, so that the first motor 21 and the second motor 22 can be used together to drive the two front wheels to rotate, and the first motor 21 and the second motor 22 can both drive the left front wheel and the right front wheel to rotate simultaneously through the differential 5, so that when the first motor 21 is used to generate power in cooperation with the range extender 25, the second motor 22 can drive the two front wheels to rotate simultaneously.

As shown in fig. 1, the third motor 23 is power-connected with the right rear wheel through a gear set, and the fourth motor 24 is power-connected with the left rear wheel through a gear set, so that two rear wheels can be simultaneously driven by the third motor 23 and the fourth motor 24, thereby realizing independent driving of four wheels.

Therefore, by arranging the power transmission system 100, independent driving of each wheel can be realized, the escaping capability of the whole vehicle is improved, the setting of an independent generator can be reduced, and when the first motor 21 generates electricity, the effective driving of each wheel can be still ensured, and the dynamic property of the vehicle in the electricity generation process is ensured.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A drivetrain, comprising:

A first wheel and a second wheel;

a first motor, a range extender, and a planetary gear mechanism for dynamically connecting the first motor with the range extender and for dynamically connecting the first motor and/or the range extender with the first wheel or with the first wheel and the second wheel simultaneously;

And a second motor disposed in power connection with the second wheel or with both the first wheel and the second wheel.

2. The drivetrain of claim 1, wherein the planetary gear mechanism comprises a planet carrier, a planet wheel, a sun wheel and a ring gear, the sun wheel is positioned in the ring gear, the planet wheel is positioned between the sun wheel and the ring gear and meshed with the sun wheel and the ring gear respectively, the planet wheel is rotatably connected to the planet carrier, the first motor is connected to the sun wheel, the range extender is connected to the planet carrier, and the ring gear is connected to the first wheel or both the first wheel and the second wheel in a power manner.

3. The drivetrain of claim 2, further comprising a differential coupled to the first wheel and the second wheel, the differential being in dynamic communication with the first and second wheel axles, respectively;

Wherein the ring gear is selectively in power connection with the first axle and the differential, and the second electric machine is selectively in power connection with the second axle and the differential.

4. A drivetrain according to claim 3, further comprising a first input shaft in power connection with the ring gear, the first input shaft being provided with a first transfer gear, a second transfer gear and a first synchronizer for power connection of the first input shaft with the first transfer gear or the second transfer gear;

The first wheel axle is provided with a first output gear meshed with the first transmission gear, and the differential is provided with a differential gear meshed with the second transmission gear;

And/or, the motor driving device further comprises a second input shaft, wherein the second input shaft is in power connection with the second motor, the second input shaft is provided with a third transmission gear, a fourth transmission gear and a second synchronizer, and the second synchronizer is used for dynamically connecting the second input shaft with the third transmission gear or the fourth transmission gear;

The second wheel axle is provided with a second output gear meshed with the third transmission gear, and the differential is provided with a differential gear meshed with the fourth transmission gear.

5. The powertrain system of claim 4, wherein the first input shaft is provided with a first input gear that meshes with the ring gear.

6. A drivetrain according to claim 3, wherein the axis of the first axle coincides with the axis of the second axle and the first and second motors are located on either side of the first axle.

7. The powertrain system of any one of claims 1-6, further comprising: a third wheel, a fourth wheel, a third motor, and a fourth motor;

The third wheel is connected with a third wheel shaft, the third wheel shaft is provided with a third output gear, the third motor is provided with a third motor gear, the third motor gear is in power connection with the third output gear through a gear set, the fourth wheel is connected with a fourth wheel shaft, the fourth wheel shaft is provided with a fourth output gear, the fourth motor is provided with a fourth motor gear, and the fourth motor gear is in power connection with the fourth output gear through the gear set.

8. The powertrain system of claim 7, wherein the first and second wheels are each configured as front wheels and the third and fourth wheels are each configured as rear wheels;

and/or, the third motor and the fourth motor are both positioned behind the rear wheel axle.

9. The drivetrain of any of claims 1-6, wherein the range extender and the first motor are both located forward of a front axle and the second motor is located between a front axle and a rear axle.

10. A vehicle, characterized in that a drivetrain according to any one of claims 1-9 is provided.