Coaxial torque vector distribution system

Abstract

The utility model discloses a coaxial torque vector distribution system which comprises a differential mechanism and a vector motor, a motor shaft of the vector motor is sleeved on a left half shaft of the differential mechanism in an empty mode, and the motor shaft is in transmission connection with the left half shaft and the differential mechanism through a transmission assembly. The transmission assembly comprises a first planet row and a second planet row, the first planet row and the second planet row share the same planet carrier, a first gear ring of the first planet row is fixedly connected to the left half shaft, and a second gear ring of the second planet row is fixedly connected to the differential mechanism shell. The sun gear of the first planet row or the sun gear of the second planet row is fixedly arranged at the far end of the motor shaft. The differential mechanism has a torque distribution function, the double planet row systems share one planet carrier, and the rotating speed of the planet carrier is lower than that of the differential mechanism shell, so that the dragging torque is smaller, and the performance is stronger; meanwhile, the gear ring is adopted for power output, the rotating speed of a transmission assembly of the whole system can be reduced, heat generation is greatly reduced, the problems of oil liquid oxidative deterioration, lubricating performance reduction, aging of rubber sealing pieces and the like are solved, and safety is improved to the maximum extent.

Description

Technical Field

[0001] This utility model relates to the field of automotive power chassis technology, and more specifically, to a coaxial torque vector distribution system. Background Technology

[0002] Today, China's automotive industry is enormous in scale and mature in market, with a gradually forming automotive culture and a new round of consumption upgrades underway. People's demands for cars have gradually shifted from initial economic practicality to safety, environmental protection, intelligence, convenience, and personalization. These factors have spurred the continuous research and widespread application of various automotive technologies, especially advanced chassis technology.

[0003] Vehicle safety performance is a crucial topic in automotive research. Electronic Stability Program (ESP), as one of the representative active safety technologies, improves vehicle handling stability by applying braking force to one side of the wheels to generate additional yaw torque and thus controlling the vehicle's dynamics. However, because ESP uses differential braking to control the vehicle, it negatively impacts driving performance and fuel economy during operation, resulting in power loss. Therefore, researchers have proposed torque vectoring technology to address the energy consumption and driving experience issues in vehicle yaw dynamics control.

[0004] For example, CN113217600B discloses an automotive differential with torque vectoring function, including: a main reducer, a differential, a first half-shaft, a second half-shaft, a dual planetary gear set (TV) coupling mechanism, a first brake, a second brake, a front housing, a rear housing, and bearing end caps. The dual planetary gear set (TV) coupling mechanism uses a Simpson's planetary gear system with a shared sun gear, and the first and second brakes respectively brake the first planetary gear ring and the second planetary gear carrier of the dual planetary gear set (TV) coupling mechanism; the sun gear of the dual planetary gear set (TV) coupling mechanism is splinedly connected to the second half-shaft. However, this automotive differential has an unreasonable layout. Under conditions of high-angle turns, poor road surface adhesion, or adverse conditions, its stability is poor, easily leading to slippage, sideslip, and poor climbing ability, posing significant safety hazards. Traditional brakes cannot meet the high-precision torque response control requirements of the entire vehicle. Furthermore, in the industry, the motor is usually located on one side of the first half-shaft, with its motor shaft parallel to the first half-shaft. This layout results in a large radial footprint, restricting the overall vehicle layout and hindering reasonable design, thus having significant limitations. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a coaxial torque vector distribution system.

[0006] The objective of this utility model is achieved through the following technical solution:

[0007] A coaxial torque vector distribution system, including

[0008] A differential, which is connected to the left half-shaft on one side and the right half-shaft on the other side, is used to enable the wheel hubs mounted on the left and right half-shafts to rotate at different speeds.

[0009] Vector motor, with a motor shaft;

[0010] The motor shaft is loosely fitted on the left half-shaft and is coaxial with it; the motor shaft transmits power to the left half-shaft and the differential housing respectively through the transmission assembly;

[0011] The transmission assembly includes a first planetary gear set and a second planetary gear set. The first planetary gear set and the second planetary gear set share the same planetary carrier. The first planetary gear set includes a first sun gear, and the second planetary gear set includes a second sun gear. One of the first sun gear and the second sun gear is fixedly mounted on the motor shaft, and the other is fixedly mounted on the torque transfer mechanism housing.

[0012] The first ring gear of the first planetary gear set is fixedly connected to the left half-shaft, and the second ring gear of the second planetary gear set is fixedly connected to the differential housing.

[0013] Preferably, the first planetary gear set includes a first sun gear fixedly disposed at the far end of the motor shaft, and a first planet gear meshing with the first ring gear and the first sun gear; the second planetary gear set includes a second sun gear disposed on the housing of the torque transfer mechanism, and a second planet gear meshing with the second ring gear and the second sun gear, the second planet gear and the first planet gear being coaxially connected through the planet carrier, and the planet carrier being located inside the second planet gear and the first planet gear.

[0014] Preferably, the first planetary gear set includes a first sun gear fixedly disposed at the far end of the motor shaft, and a first planet gear meshing with the first ring gear and the first sun gear; the second planetary gear set includes a second sun gear disposed on the torque transfer mechanism housing, and a second planet gear meshing with the second ring gear and the second sun gear, the second planet gear and the first planet gear being coaxially connected through the planet carrier, the planet carrier being located outside the second planet gear and the first planet gear, and the first ring gear and the second ring gear being disposed opposite to each other.

[0015] Preferably, a disconnection device is provided between the second sun gear and the torque transfer mechanism housing, or a disconnection device is provided between the motor shaft and the first sun gear.

[0016] Preferably, the first planetary gear set includes a first sun gear disposed on the housing of the torque transfer mechanism, and a first planet gear meshing with the first ring gear and the first sun gear; the second planetary gear set includes a second sun gear fixedly disposed at the far end of the motor shaft, and a second planet gear meshing with the second ring gear and the second sun gear, the second planet gear and the first planet gear being coaxially connected by a planet carrier, and the planet carrier being located inside the second planet gear and the first planet gear.

[0017] Preferably, the first planetary gear set includes a first sun gear disposed on the housing of the torque transfer mechanism, and a first planet gear meshing with the first ring gear and the first sun gear; the second planetary gear set includes a second sun gear fixedly disposed at the far end of the motor shaft, and a second planet gear meshing with the second ring gear and the second sun gear; the second planet gear and the first planet gear are coaxially connected by a planet carrier, the planet carrier being located outside the second planet gear and the first planet gear, and the first ring gear and the second ring gear being disposed opposite to each other.

[0018] Preferably, a disconnection device is provided between the first sun gear and the torque transfer mechanism housing, or between the second sun gear and the motor shaft.

[0019] Preferably, the motor shaft is further provided with a reducer, the vector motor faces away from the differential, and both the vector motor and the reducer are located between the transmission assembly and the reducer.

[0020] Preferably, the vector motor is electrically connected to the battery.

[0021] The beneficial effects of this utility model are mainly reflected in:

[0022] 1. This utility model system has a torque distribution function, which takes into account both the energy consumption problem and driving experience in yaw dynamics control; under the same specification vector motor, it can enhance the torque of the car and improve the adhesion, thereby meeting the requirements of driving on roads with high cornering or poor adhesion conditions or in harsh conditions, and can effectively improve the car's economy, handling stability and active safety.

[0023] 2. The transmission component of this utility model uses a planetary gear system with a shared planetary carrier, and the rotational speed of the planetary carrier is lower than that of the differential, which can reduce the drag torque and improve the performance. At the same time, it can also reduce the number of parts, further reduce the weight and enhance the heat dissipation capacity, thus achieving overall lightweighting.

[0024] 3. The transmission assembly of this utility model uses a gear ring for power output (i.e., the first gear ring is fixedly connected to the left half shaft for torque output, and the second gear ring is fixedly connected to the differential housing for torque output). This structure can lead to a larger speed ratio, which can significantly reduce the overall speed of the transmission assembly, greatly reduce heat generation, reduce oil oxidation and deterioration, reduce lubrication performance and rubber seal aging, and maximize safety.

[0025] 4. The present invention arranges vector motors coaxially, which can significantly reduce radial dimensions and lower the overall height of the vehicle, maximizing the balance between the vehicle's power and economy, and also making the structure more compact and the layout more reasonable.

[0026] 5. The present invention requires minimal modification to the traditional differential, has low modification costs, and is widely applicable.

[0027] 6. In this utility model, the vector motor, the first planetary gear set, the second planetary gear set, and the differential are all rigidly connected, which can maximize the control accuracy of the system, with a control accuracy of less than 10ms and a fast feedback speed. Attached Figure Description

[0028] The technical solution of this utility model will be further described below with reference to the accompanying drawings:

[0029] Figure 1 : A schematic diagram of the structure of the first embodiment of this utility model;

[0030] Figure 2 : A schematic diagram of the structure of the second embodiment of this utility model;

[0031] Figure 3 : A schematic diagram of the structure of the third embodiment of this utility model;

[0032] Figure 4 : A schematic diagram of the structure of the fourth embodiment of this utility model. Detailed Implementation

[0033] The present invention will now be described in detail with reference to the specific embodiments shown in the accompanying drawings. However, these embodiments are not limited to the present invention, and any structural, methodological, or functional modifications made by those skilled in the art based on these embodiments are included within the protection scope of the present invention.

[0034] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0035] like Figures 1 to 4As shown, this utility model discloses a coaxial torque vectoring distribution system, including a differential 1 and a vector motor 4. Similar to existing technologies, the differential is powered by a main drive mechanism, which can be electric, hybrid, or other feasible solutions. The differential 1 has a left half-shaft 2 on one side and a right half-shaft 3 on the other side. The differential 1 is used to enable different rotational speeds for the wheel hubs mounted on the left half-shaft 2 and the right half-shaft 3.

[0036] The vector motor 4 is electrically connected to the battery and has a motor shaft 41, which is loosely fitted on the left half-shaft 2 and coaxial with it. In this invention, the motor shaft 41 and the differential half-shaft are arranged coaxially, which can significantly reduce the radial dimension, lower the overall vehicle height, maximize the balance between the vehicle's power and economy, and make the structure more compact and the layout more reasonable.

[0037] This invention also includes a transmission assembly, through which the motor shaft 41 transmits power to the housings of the left half-shaft 2 and the differential 1 respectively.

[0038] Specifically, the transmission assembly includes a first planetary gear set 5 and a second planetary gear set 6, which share the same planet carrier 7. By sharing a single planet carrier, the dual planetary gear sets can reduce the number of parts, further reduce weight, and enhance heat dissipation, achieving overall weight reduction; at the same time, they can also reduce costs.

[0039] Of course, more importantly, according to the speed ratio equation, the rotational speed of the planetary carrier in this invention is lower than that of the differential. When the planetary carrier rotates at a lower speed, the movement of the planetary gears it drives is relatively smoother, the meshing between the planetary gears and the half-shaft gears is more stable, and the impact and loss during power transmission are reduced. This means that the system does not need to overcome a large amount of additional resistance to transmit power, resulting in a smaller drag torque. Furthermore, the reduced drag torque means that the power output of the engine can be transmitted to the wheels more effectively. When the vehicle is turning or performing other operations, the differential can more flexibly adjust the rotational speed of the two wheels, making the speed difference between the inner and outer wheels more in line with actual driving needs. The vehicle's steering is more precise and smooth, reducing phenomena such as jerking and fishtailing during steering, and improving the vehicle's handling performance and driving safety.

[0040] In the first embodiment of this utility model, the first ring gear 51 of the first planetary gear set 5 is fixedly connected to the left half-shaft 2, and the second ring gear 61 of the second planetary gear set 6 is fixedly connected to the differential housing. The sun gear of either the first planetary gear set 5 or the second planetary gear set 6 is optionally fixedly disposed at the far end of the motor shaft 41. This arrangement has a torque distribution function, taking into account both energy consumption issues in yaw dynamics control and driving experience; it can effectively improve the vehicle's economy, handling stability, and active safety. The connection of the first ring gear to the differential reduces intermediate transmission components and increases structural rigidity. The direct connection of the second ring gear to the left half-shaft shortens the power transmission path and reduces energy loss. In this utility model, the first and second ring gears are respectively connected to the differential housing and the left half-shaft for power output. When using helical gears, the thrust bearing can be miniaturized and arranged on both sides of the connecting plate, eliminating the need for additional parts to guide the axial force of the ring gear. The first and second ring gears can be radially fixed to the existing structure to improve NVH performance. Furthermore, the ring gear is the largest diameter component in the planetary gear set, while the planetary gears are smaller. According to the gear transmission principle, power is transmitted to the ring gear through the planetary gears, resulting in a larger speed ratio. This transmission assembly utilizes the ring gear for transmission, leading to a higher speed ratio. This reduces the overall rotational speed of the entire transmission assembly, significantly reducing heat generation and minimizing problems such as oil oxidation and deterioration, reduced lubrication performance, and aging of rubber seals, thus maximizing safety. This is an advantage unmatched by existing technologies.

[0041] like Figure 1 As shown in the first embodiment of this utility model, specifically, the first planetary gear set 5 includes a first sun gear 52 fixedly disposed at the distal end of the motor shaft 41, and a first planet gear 53 meshing with the first ring gear 51 and the first sun gear 52; the second planetary gear set 6 includes a second sun gear 62 disposed on the torque transfer mechanism housing, and a second planet gear 63 meshing with the second ring gear 61 and the second sun gear 62, the second planet gear 63 and the first planet gear 53 being coaxially connected through the planet carrier 7, and the planet carrier 7 being located inside the second planet gear 63 and the first planet gear 53. A reducer 8 is also provided on the motor shaft 41, the vector motor 4 faces the differential 1, and the transmission assembly is located between the vector motor 4 and the reducer 8. The reducer can reduce the rotational speed and increase the torque.

[0042] The working process of this first embodiment is briefly described below:

[0043] When the vehicle is driving normally, the first planetary gear set 5 and the second planetary gear set 6 are idling without load, and the vector motor 4 is not running.

[0044] When the vehicle turns, a speed difference occurs between the left and right half-shafts. The vector motor 4 starts, driving the first sun gear 52 to rotate. The rotation of the first sun gear 52 drives the first planetary gear 53 meshing with it to rotate. The rotation of the first planetary gear 53 transmits power to the first ring gear 51 and, through the planet carrier 7, to the second planetary gear 63. The first ring gear 51 drives the left half-shaft 2 to rotate. The second planetary gear 63 transmits power to the differential housing through the second ring gear 61 meshing with it, creating a "differential torque" effect between the two half-shafts of the differential.

[0045] like Figure 2 As shown, this is the second embodiment of the present invention. Specifically, the first planetary gear set 5 includes a first sun gear 52 fixedly disposed at the far end of the motor shaft 41, and a first planet gear 53 meshing with the first ring gear 51 and the first sun gear 52; the second planetary gear set 6 includes a second sun gear 62 disposed on the torque transfer mechanism housing, and a second planet gear 63 meshing with the second ring gear 61 and the second sun gear 62, the second planet gear 63 and the first planet gear 53 being coaxially connected through the planet carrier 7, the planet carrier 7 being located outside the second planet gear 63 and the first planet gear 53, and the first ring gear 51 and the second ring gear 61 being disposed opposite to each other.

[0046] The working process of this second embodiment is briefly described below:

[0047] When the vehicle is driving normally, the first planetary gear set 5 and the second planetary gear set 6 are idling without load, and the vector motor 4 is not running.

[0048] When the vehicle turns, a speed difference occurs between the left and right half-shafts. The vector motor 4 starts, driving the first sun gear 52 to rotate. The rotation of the first sun gear 52 drives the first planetary gear 53 meshing with it to rotate. The rotation of the first planetary gear 53 transmits power to the first ring gear 51 and, through the planet carrier 7, to the second planetary gear 63. The first ring gear 51 drives the left half-shaft 2 to rotate. The second planetary gear 63 transmits power to the differential housing through the second ring gear 61 meshing with it, creating a "differential torque" effect between the two half-shafts of the differential.

[0049] In the first and second embodiments, a disconnection device is provided between the second sun gear 62 and the torque transfer mechanism housing, or a disconnection device 10 is provided between the motor shaft 41 and the first sun gear 52. The disconnection device is used to transmit or interrupt torque transmission within the system. The disconnection device can be a claw clutch, a sliding clutch, or a friction clutch; of course, it can also be other structures. The specific working process will be detailed later.

[0050] like Figure 3As shown in the third embodiment of this utility model, specifically, the first planetary gear set 5 includes a first sun gear 52 disposed on the housing of the torque transfer mechanism, and a first planet gear 53 meshing with the first ring gear 51 and the first sun gear 52; the second planetary gear set 6 includes a second sun gear 62 fixedly disposed at the distal end of the motor shaft 41, and a second planet gear 63 meshing with the second ring gear 61 and the second sun gear 62, the second planet gear 63 and the first planet gear 53 being coaxially connected by a planet carrier 7, and the planet carrier 7 being located inside the second planet gear 63 and the first planet gear 53. A reducer 8 is also provided on the motor shaft 41, the vector motor 4 faces away from the differential 1, and both the vector motor 4 and the reducer 8 are located between the transmission assembly and the reducer 8.

[0051] The working process of this third embodiment is briefly described below:

[0052] When the vehicle is driving normally, the first planetary gear set 5 and the second planetary gear set 6 are idling without load, and the vector motor 4 is not running.

[0053] When the vehicle turns, a speed difference occurs between the left and right half-shafts. The vector motor 4 starts, driving the second sun gear 62 to rotate. The rotation of the second sun gear 62 drives the second planetary gear 63 meshing with it to rotate. The rotation of the second planetary gear 63 transmits power to the second ring gear 61 and, through the planet carrier 7, to the first planetary gear 53. The second ring gear 61 drives the left half-shaft 2 to rotate. The first planetary gear 53 transmits power to the differential housing through the first ring gear 51 meshing with it, creating a "differential torque" effect between the two half-shafts of the differential.

[0054] like Figure 4 As shown, this is the fourth embodiment of the present invention. Specifically, the first planetary gear set 5 includes a first sun gear 52 disposed on the housing of the torque transfer mechanism, and a first planet gear 53 meshing with the first ring gear 51 and the first sun gear 52; the second planetary gear set 6 includes a second sun gear 62 fixedly disposed at the far end of the motor shaft 41, and a second planet gear 63 meshing with the second ring gear 61 and the second sun gear 62. The second planet gear 63 and the first planet gear 53 are coaxially connected by a planet carrier 7, which is located outside the second planet gear 63 and the first planet gear 53. The first ring gear 51 and the second ring gear 61 are arranged opposite to each other.

[0055] The working process of this fourth embodiment is briefly described below:

[0056] When the vehicle is driving normally, the first planetary gear set 5 and the second planetary gear set 6 are idling without load, and the vector motor 4 is not running.

[0057] When the vehicle turns, a speed difference occurs between the left and right half-shafts. The vector motor 4 starts, driving the second sun gear 62 to rotate. The rotation of the second sun gear 62 drives the second planetary gear 63 meshing with it to rotate. The rotation of the second planetary gear 63 transmits power to the second ring gear 61 and, through the planet carrier 7, to the first planetary gear 53. The second ring gear 61 drives the left half-shaft 2 to rotate. The first planetary gear 53 transmits power to the differential housing through the first ring gear 51 meshing with it, creating a "differential torque" effect between the two half-shafts of the differential.

[0058] In the third and fourth embodiments, a disconnection device 10 is provided between the first sun gear 52 and the torque transfer mechanism housing, or in another form, a disconnection device 10 is provided between the second sun gear 62 and the motor shaft 41.

[0059] All embodiments of this utility model include the aforementioned disconnecting device, and the use of the disconnecting device is a preferred embodiment of this utility model. The disconnecting device is a claw clutch, a sliding clutch, or a friction clutch; of course, other structures are also possible and all fall within the protection scope of this utility model.

[0060] The disconnection device can detach a portion of the system, which helps eliminate mechanical losses associated with the rotation of various unused components, thereby improving the overall efficiency of the system.

[0061] The disconnection device is controlled by an actuator, which may be electromechanical, electromagnetic, or hydraulic.

[0062] Currently, the industry standard typically includes the disconnect device within the auxiliary drive system. When the permanent magnet motor serves as an auxiliary motor in the vehicle's auxiliary drive system, in the off-power state, to prevent the auxiliary drive system from generating reverse rotational torque (i.e., the rotor of the permanent magnet motor would cut magnetic lines of force as it rotates with the differential housing), the disconnect device within the auxiliary drive system disconnects the permanent magnet motor from the differential housing. To save overall vehicle energy consumption, when the vehicle is traveling at high speed, the disconnect device can disconnect the permanent magnet motor in the auxiliary drive system from the differential housing; that is, the auxiliary drive system does not transmit power to the differential housing, while the left half-shaft 2 and right half-shaft 3 operate normally at high speed.

[0063] When the coaxial torque vectoring distribution system is used in conjunction with the vehicle auxiliary drive system, if the disconnect device on the auxiliary drive system is disconnected when the vehicle is in a high-speed forward state, the left half-shaft 2 or right half-shaft 3 will have a speed difference of more than 1000 RPM with the differential housing. Due to the rigid connection of the vector motor, the first planetary gear set, the second planetary gear set, and the differential, as well as the speed ratio, the vector motor will continuously operate at a speed exceeding 20000 RPM. Long-term high-speed operation will have a significant adverse impact on the thermal balance performance, efficiency, and reliability of the coaxial torque vectoring distribution system. Therefore, the disconnect device of the coaxial torque vectoring distribution system also needs to be disconnected.

[0064] Of course, in the embodiments of this utility model, the disconnection device may not be provided. In this way, the vector motor, the first planetary gear set, the second planetary gear set and the differential are all rigidly connected, which can maximize the feedback speed of the system.

[0065] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0066] The detailed descriptions listed above are merely specific descriptions of feasible implementations of this utility model, and are not intended to limit the scope of protection of this utility model. All equivalent implementations or modifications made without departing from the spirit of this utility model should be included within the scope of protection of this utility model.

Claims

1. A coaxial torque vector distribution system, including The differential (1) is connected to the left half-shaft (2) on one side and the right half-shaft (3) on the other side, and is used to enable the wheel hubs set on the left half-shaft (2) and the right half-shaft (3) to achieve different speeds; Vector motor (4), with motor shaft (41). Its features are: The motor shaft (41) is loosely fitted on the left half shaft (2) and is coaxial with it; the motor shaft (41) transmits power to the housing of the left half shaft (2) and the differential (1) respectively through the transmission assembly; The transmission assembly includes a first planetary gear set (5) and a second planetary gear set (6). The first planetary gear set (5) and the second planetary gear set (6) share the same planet carrier (7). The first planetary gear set (5) includes a first sun gear (52), and the second planetary gear set (6) includes a second sun gear (62). One of the first sun gear (52) and the second sun gear (62) is fixedly mounted on the motor shaft (41), and the other is fixedly mounted on the torque transfer mechanism housing. The first ring gear (51) of the first planetary gear set (5) is fixedly connected to the left half shaft (2), and the second ring gear (61) of the second planetary gear set (6) is fixedly connected to the differential housing.

2. The coaxial torque vector distribution system according to claim 1, characterized in that: The first planetary gear set (5) includes a first sun gear (52) fixedly disposed at the far end of the motor shaft (41), and a first planet gear (53) meshing with the first ring gear (51) and the first sun gear (52); the second planetary gear set (6) includes a second sun gear (62) disposed on the housing of the torque transfer mechanism, and a second planet gear (63) meshing with the second ring gear (61) and the second sun gear (62), the second planet gear (63) and the first planet gear (53) being coaxially connected through the planet carrier (7), and the planet carrier (7) being located inside the second planet gear (63) and the first planet gear (53).

3. The coaxial torque vector distribution system according to claim 1, characterized in that: The first planetary gear set (5) includes a first sun gear (52) fixedly disposed at the far end of the motor shaft (41), and a first planet gear (53) meshing with the first ring gear (51) and the first sun gear (52); the second planetary gear set (6) includes a second sun gear (62) disposed on the housing of the torque transfer mechanism, and a second planet gear (63) meshing with the second ring gear (61) and the second sun gear (62), and the second planet gear (63) and the first planet gear (53) are coaxially connected through the planet carrier (7), the planet carrier (7) is located outside the second planet gear (63) and the first planet gear (53), and the first ring gear (51) and the second ring gear (61) are arranged opposite to each other.

4. The coaxial torque vector distribution system according to claim 2 or 3, characterized in that: A disconnection device (10) is provided between the second sun gear (62) and the housing of the torque transfer mechanism.

5. The coaxial torque vector distribution system according to claim 2 or 3, characterized in that: A disconnection device (10) is provided between the motor shaft (41) and the first sun gear (52).

6. The coaxial torque vector distribution system according to claim 1, characterized in that: The first planetary gear set (5) includes a first sun gear (52) disposed on the housing of the torque transfer mechanism, and a first planet gear (53) meshing with the first ring gear (51) and the first sun gear (52); the second planetary gear set (6) includes a second sun gear (62) fixedly disposed at the far end of the motor shaft (41), and a second planet gear (63) meshing with the second ring gear (61) and the second sun gear (62), and the second planet gear (63) and the first planet gear (53) are coaxially connected by a planet carrier (7), and the planet carrier (7) is located inside the second planet gear (63) and the first planet gear (53).

7. The coaxial torque vector distribution system according to claim 1, characterized in that: The first planetary gear set (5) includes a first sun gear (52) disposed on the housing of the torque transfer mechanism, and a first planet gear (53) meshing with the first ring gear (51) and the first sun gear (52); the second planetary gear set (6) includes a second sun gear (62) fixedly disposed at the far end of the motor shaft (41), and a second planet gear (63) meshing with the second ring gear (61) and the second sun gear (62), and the second planet gear (63) and the first planet gear (53) are coaxially connected by a planet carrier (7), the planet carrier (7) being located outside the second planet gear (63) and the first planet gear (53), and the first ring gear (51) and the second ring gear (61) being disposed opposite to each other.

8. The coaxial torque vector distribution system according to claim 6 or 7, characterized in that: A disconnection device (10) is provided between the first sun gear (52) and the torque transfer mechanism housing.

9. The coaxial torque vector distribution system according to claim 6 or 7, characterized in that: A disconnection device (10) is provided between the second sun gear (62) and the motor shaft (41).

10. The coaxial torque vector distribution system according to claim 1, characterized in that: The vector motor (4) is electrically connected to the battery.

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