Drive system, drive assembly, vehicle drive method, and vehicle

Abstract

Provided are a drive system, a drive assembly, a vehicle drive method, and a vehicle. The drive system comprises a drive motor, a gear shifting and transmission assembly, a differential assembly, two output shafts, and two variable-speed motors. The drive motor has a drive output shaft, and the drive motor has a neutral gear state, a first-gear state, and a second-gear state. In the first-gear state, the drive output shaft is engaged with a first-gear input end of the gear shifting and transmission assembly. In the second-gear state, the drive output shaft is engaged with a second-gear input end of the gear shifting and transmission assembly. The differential assembly is connected to a transmission output end. A first output shaft and a second output shaft are connected to the differential assembly. A first variable-speed motor is connected to the first output shaft, and a second variable-speed motor is connected to the second output shaft.

Description

Drive system, drive assembly, vehicle drive method and vehicle

[0001] Cross-reference to related applications

[0002] The present invention claims priority from Chinese Patent Application No. 2024108954647 filed on July 04, 2024 in China, the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present disclosure relates to the technical field of vehicles, in particular to a drive system, a drive assembly, a vehicle drive method and a vehicle. BACKGROUND

[0004] For a pure electric vehicle, since the driving motor has different working characteristics from a traditional internal combustion engine, it can output large torque at low speed and constant power at high speed, so the motor characteristics can basically match the vehicle demand, without the need to increase a multi-gear transmission, only a single-stage reducer or a two-gear transmission is needed. For a two-gear transmission scheme, the motor output torque can be reduced, the motor size and cost can be reduced, and the motor operating state can be optimized, but it is usually based on a synchronizer type, and adopts a form of single-sided speed regulation of the driving motor, which leads to long shift time, power interruption during shifting, relatively low success rate of one-time gear engagement, and the situation that shifting cannot be performed when turning and climbing, poor shifting applicability. SUMMARY

[0005] The present disclosure aims to at least partially solve one of the technical problems in the related art. To this end, an embodiment of the present disclosure proposes a drive system, which can avoid power interruption, shorten shifting time, improve one-time gear engagement success rate, improve comfort during shifting, and can perform shifting when turning and climbing, has good shifting adaptability, and can reduce the turning radius when turning and achieve zero abnormal sound.

[0006] An embodiment of the present disclosure proposes a drive assembly.

[0007] An embodiment of the present disclosure proposes a vehicle drive method.

[0008] An embodiment of the present disclosure proposes a vehicle.

[0009] The driving system of the embodiment of the present disclosure comprises a driving motor, a gear shifting transmission assembly, a differential assembly, a first output shaft, a second output shaft, a first speed regulating motor and a second speed regulating motor. The driving motor has a neutral state, a first gear state and a second gear state, and has a driving output shaft; the gear shifting transmission assembly has a first gear input end, a second gear input end and a transmission output end, in the first gear state, the driving output shaft is combined with the first gear input end, in the second gear state, the driving output shaft is combined with the second gear input end; the differential assembly is connected with the transmission output end; the first output shaft and the second output shaft are distributed on both sides of the differential assembly and are connected with the differential assembly; the first speed regulating motor is connected with the first output shaft, and the second speed regulating motor is connected with the second output shaft.

[0010] The driving system of the embodiment of the present disclosure, in the gear shifting process, not only outputs power through the first speed regulating motor and the second speed regulating motor to control the rotating speeds of the first wheel and the second wheel to avoid power interruption, but also forms a two-end speed regulation mode with the driving motor through the first speed regulating motor and the second speed regulating motor, so as to shorten the gear shifting time, improve the first gear shifting success rate, improve the comfort of the gear shifting process, and reduce the turning radius when turning to realize zero abnormal sound. At the same time, because the driving assembly of the embodiment of the present disclosure can avoid power interruption in the gear shifting process, the vehicle condition range in which the vehicle cannot or is not suitable for gear shifting is reduced, so that the vehicle can shift gears in the turning and climbing vehicle conditions, and the gear shifting process of the driving assembly of the embodiment of the present disclosure has strong adaptability to vehicle conditions, thereby improving the driving comfort of the vehicle.

[0011] In some embodiments, the gear shifting transmission assembly comprises a dog clutch, a first gear driving gear, a second gear driving gear and a gear shifting driving member, the dog clutch has a clutch body and a combination tooth sleeve, the clutch body is sleeved on the driving output shaft, the combination tooth sleeve is slidably arranged on the clutch body, the first gear driving gear is sleeved on the driving output shaft, the first gear driving gear forms the first gear input end, the second gear driving gear is sleeved on the driving output shaft, the second gear driving gear and the first gear driving gear are respectively located on both sides of the dog clutch, and the second gear driving gear forms the second gear input end; the gear shifting driving member is detachably connected with the combination tooth sleeve, so that when the gear shifting driving member is connected with the combination tooth sleeve, the gear shifting driving member drives the combination tooth sleeve to be combined with the first gear driving gear or the second gear driving gear.

[0012] In some embodiments, the shift transmission assembly comprises a transmission shaft, a first driven gear, a second driven gear and a transmission gear, the first driven gear, the second driven gear and the transmission gear are sleeved on the transmission shaft, the first driven gear is engaged with the first driving gear, the second driven gear is engaged with the first driving gear, and the transmission gear forms the transmission output end.

[0013] In some embodiments, the transmission gear is located between the first driven gear and the second driven gear.

[0014] In some embodiments, the first speed regulating motor is a first in-wheel motor, and a rotor of the first in-wheel motor is coaxially arranged with the first output shaft.

[0015] In some embodiments, the second speed regulating motor is a second in-wheel motor, and a rotor of the second in-wheel motor is coaxially arranged with the second output shaft.

[0016] A drive assembly according to an embodiment of the present disclosure comprises any one of the drive systems, a first wheel and a second wheel, the first wheel is arranged on the first output shaft, and the second wheel is arranged on the second output shaft, wherein the first speed regulating motor of the drive system is connected to the first wheel, and the second speed regulating motor of the drive system is connected to the second wheel.

[0017] The drive assembly according to an embodiment of the present disclosure can avoid power interruption, shorten the shift time, improve the success rate of one-time gear engagement, improve the comfort of the shift process, improve the adaptability of the shift process to the vehicle condition, enable the vehicle to shift gears when turning and climbing, reduce the turning radius when turning, and achieve zero abnormal noise.

[0018] The vehicle driving method according to an embodiment of the present disclosure adopts the drive assembly, and the vehicle driving method is as follows: when shifting gears, the drive assembly first switches the drive output shaft of the drive motor to a neutral state, starts the first speed regulating motor and the second speed regulating motor, changes the rotational speed of the first input end and the second input end, reduces the rotational speed difference between one of the first input end and the second input end and the drive output shaft, and then combines one of the first input end and the second input end with the drive output shaft to complete the gear engagement.

[0019] The vehicle driving method of the embodiment of the present disclosure forms speed regulation of both gears engaged, can greatly shorten the speed difference between one of the first gear input end and the second gear input end and the driving output shaft, effectively shorten the waiting time of gear engagement, and then shorten the gear shifting time. Moreover, while shortening the gear shifting time, the one of the first gear input end and the second gear input end and the driving output shaft can be actively and accurately controlled in speed, the success rate of one-time gear engagement is improved, the comfort of the gear shifting process is improved, and the gear adaptability to the vehicle condition during gear shifting is improved.

[0020] The vehicle driving method of the embodiment of the present disclosure adopts the driving assembly, and the vehicle driving method is as follows: when the vehicle is turning, the first speed regulation motor and the second speed regulation motor are started, the first speed regulation motor increases the speed of the first wheel and the second speed regulation motor decreases the speed of the second wheel, or the first speed regulation motor decreases the speed of the first wheel and the second speed regulation motor increases the speed of the second wheel, so that the speed of the wheel located on the inside of the curve is reduced and the speed of the wheel located on the outside of the curve is increased.

[0021] The vehicle driving method of the embodiment of the present disclosure can reduce the turning radius when the vehicle is turning, and can reduce the interaction force between the friction pairs in the differential assembly, thereby facilitating the reduction of the abnormal sound risk of the differential assembly during turning.

[0022] The vehicle of the embodiment of the present disclosure comprises a vehicle body and the driving system provided on the vehicle body.

[0023] The vehicle of the embodiment of the present disclosure avoids power interruption during gear shifting, the first speed regulation motor and the second speed regulation motor form two-end speed regulation with the driving motor, the gear shifting time is shortened, the one-time gear engagement success rate is improved by actively and accurately controlling the speed of the two ends, the comfort of the gear shifting process is improved, the turning radius is reduced when turning, zero abnormal sound is achieved, the adaptability of the gear shifting process to the vehicle condition is improved, and the driving comfort of the vehicle is improved. BRIEF DESCRIPTION OF DRAWINGS

[0024] FIG. 1 is a schematic view of the driving assembly of the embodiment of the present disclosure.

[0025] FIG. 1 is a schematic view of the driving assembly of the embodiment of the present disclosure.

[0025] Reference signs: driving assembly 1000; driving system 100, first wheel 200, second wheel 300; driving motor 1, driving output shaft 11; gear shifting and speed changing assembly 2, first gear input end 201, second gear input end 202, speed changing output end 203, dog clutch 21, first gear driving gear 22, second gear driving gear 23, gear shifting driving member 24, transmission shaft 25, first gear driven gear 26, second gear driven gear 27, transmission gear 28; differential assembly 3, first output shaft 4, second output shaft 5, first speed regulation motor 6, second speed regulation motor 7. DETAILED DESCRIPTION

[0026] Embodiments of the present disclosure are described in detail below with reference to examples shown in the drawings. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present disclosure, and cannot be understood as a limitation of the present disclosure.

[0027] The drive assembly 1000, the drive system 100, the vehicle driving method and the vehicle of the embodiments of the present disclosure are described below with reference to FIG. 1.

[0028] The vehicle of the embodiments of the present disclosure comprises a vehicle body and the drive assembly 1000, and the drive assembly 1000 is arranged on the vehicle body.

[0029] The drive assembly 1000 of the embodiments of the present disclosure comprises the drive system 100, the first wheel 200 and the second wheel 300.

[0030] The drive system 100 comprises the drive motor 1, the gear shifting transmission assembly 2, the differential assembly 3, the first output shaft 4, the second output shaft 5, the first speed regulating motor 6 and the second speed regulating motor 7.

[0031] The drive motor 1 has a drive output shaft 11, and the drive motor 1 has a neutral state, a first gear state and a second gear state. The gear shifting transmission assembly 2 has a first gear input end 201, a second gear input end 202 and a transmission output end 203. In the first gear state, the drive output shaft 11 is combined with the first gear input end 201, and in the second gear state, the drive output shaft 11 is combined with the second gear input end 202. Each of the first gear input end 201 and the second gear input end 202 is connected to the transmission output end 203 to transmit power. The differential assembly 3 is connected to the transmission output end 203. The first output shaft 4 and the second output shaft 5 are distributed on both sides of the differential assembly 3 and are connected to the differential assembly 3. The first speed regulating motor 6 is connected to the first output shaft 4, and the second speed regulating motor 7 is connected to the second output shaft 5. The first wheel 200 is arranged on the first output shaft 4, and the first speed regulating motor 6 is connected to the first wheel 200. The second wheel 300 is arranged on the second output shaft 5, and the second speed regulating motor 7 is connected to the second wheel 300.

[0032] The vehicle driving method using the drive assembly 1000 of the present disclosure is as follows:

[0033] When the drive assembly 1000 is running, the drive motor 1 is the main driving force of the drive assembly 1000. The drive output shaft 11 of the drive motor 1 is combined with the first gear input end 201 or the second gear input end 201 to transmit power flow to the gear shifting transmission assembly 2. The power is output to the differential assembly 3 through the transmission output end 203, and then output to the first output shaft 4 and the second output shaft 5 through the differential assembly 3, and then drive the first wheel 200 and the second wheel 300 to rotate.

[0034] The driving assembly 1000 switches the driving motor 1 to neutral state before shifting, disconnects the first gear input end 201 or the second gear input end 201 from the driving output shaft 11, starts the first speed regulation motor 6 and the second speed regulation motor 7, changes the rotation speed of the first gear input end 201 and the second gear input end 202, reduces the rotation speed difference between one of the first gear input end 201 and the second gear input end 202 and the driving output shaft 11, and then connects one of the first gear input end 201 and the second gear input end 202 to the driving output shaft 11 to complete the gear shifting.

[0035] During the gear shifting process, after the driving motor 1 is switched to neutral state, the power transmission between the driving output shaft 11 and the gear shifting transmission assembly 2 is disconnected, and the gear shifting transmission assembly 2 relies on inertia to operate, that is, the first gear input end 201, the second gear input end 202 and the transmission output end 203 rely on inertia to rotate, the first output shaft 4 and the first wheel 200 rely on inertia to rotate, and the second output shaft 5 and the second wheel 300 rely on inertia to rotate. After the first speed regulation motor 6 and the second speed regulation motor 7 are started, the first speed regulation motor 6 and the second speed regulation motor 7 output power, the first speed regulation motor 6 drives the first output shaft 4 and the first wheel 200 to rotate, the second speed regulation motor 7 drives the second output shaft 5 and the second wheel 300 to rotate, the power flows through the differential assembly 3 to the transmission output end 203 of the gear shifting transmission assembly 2, and then to the first gear input end 201 and the second gear input end 202. After the first speed regulation motor 6 and the second speed regulation motor 7 are started, the first speed regulation motor 6 and the second speed regulation motor 7 output power, which can control the rotation speed and direction, thereby actively changing the rotation speed of one of the first gear input end 201 and the second gear input end 202, and reducing the rotation speed difference between the one of the first gear input end 201 and the second gear input end 202 and the driving output shaft 11 of the driving motor 1.

[0036] In the related art, during the gear shifting process, the speed difference between the two gears combined during the gear engagement (for example, one of the first gear input end 201 and the second gear input end 202 and the driving output shaft 11) is ±100 rpm. The driving assembly 1000 and the vehicle driving method of the embodiments of the present disclosure can actively change the speed of one of the first gear input end 201 and the second gear input end 202 by the first speed regulation motor 6 and the second speed regulation motor 7, realize the controllable speed of one of the first gear input end 201 and the second gear input end 202, and control the speed of the driving output shaft 11 by the driving motor 1. By actively controlling the speed of the two gears combined (i.e., one of the first gear input end 201 and the second gear input end 202 and the driving output shaft 11), the driving motor 1, the first speed regulation motor 6 and the second speed regulation motor 7 work together to form a form of simultaneous speed regulation at both ends, which can greatly shorten the speed difference between one of the first gear input end 201 and the second gear input end 202 and the driving output shaft 11, effectively shorten the waiting time of the gear engagement, and in turn shorten the gear shifting time. Moreover, while shortening the gear shifting time, the speed difference range of the two gears during the gear engagement can also be reduced, the success rate of the first gear engagement can be improved, and the comfort of the gear shifting process can be improved.

[0037] When the vehicle is turning, the first speed regulation motor 6 and the second speed regulation motor 7 are started, the first speed regulation motor 6 increases the speed of the first wheel 200 and the second speed regulation motor 7 decreases the speed of the second wheel 300, or the first speed regulation motor 6 decreases the speed of the first wheel 200 and the second speed regulation motor 7 increases the speed of the second wheel 300, so that the speed of the wheel located on the inside of the curve is reduced and the speed of the wheel located on the outside of the curve is increased.

[0038] The differential assembly 3 can make the first output shaft 4 and the second output shaft 5 rotate at different speeds. During the turning process, the first speed regulation motor 6 and the second speed regulation motor 7 are started, the first speed regulation motor 6 and the second speed regulation motor 7 output power, can control the speed and direction of the output, and actively drive the first output shaft 4 and the second output shaft 5 to rotate. The first speed regulation motor 6 controls the speed and direction of the first output shaft 4, and the second speed regulation motor 7 controls the speed and direction of the second output shaft 5, so that one of the first output shaft 4 and the second output shaft 5 (located on the outside of the curve) rotates in the positive direction (i.e., in the same direction as the rotation direction before turning), and the other (located on the inside of the curve) rotates in the reverse direction (i.e., in the opposite direction to the rotation direction before turning). On the one hand, the speed of the wheel located on the outside of the curve is increased and the speed of the wheel located on the inside of the curve is reduced, thereby increasing the speed difference between the first wheel 200 and the second wheel 300 and reducing the turning radius. On the other hand, the change in speed caused by the active rotation of the first output shaft 4 and the second output shaft 5 can reduce the interaction force between the friction pairs inside the differential assembly 3, thereby reducing the risk of abnormal noise of the differential assembly 3 during the turning process.

[0039] The driving system 100 of the embodiment of the present disclosure can allow gear shifting during turning. During gear shifting, when in the non-gear engagement state, i.e., when the driving motor 1 is in the neutral state, the first speed regulation motor 6 outputs power to control the first wheel 200, and the second speed regulation motor 7 outputs power to control the second wheel 300, thereby avoiding power interruption, regulating the rotation speed of the first wheel 200 and the second wheel 300, achieving the purpose of reducing the turning radius, and shortening the gear shifting time.

[0040] Therefore, the driving assembly 1000 of the embodiment of the present disclosure can not only regulate the rotation speed of the first wheel 200 and the second wheel 300 by the first speed regulation motor 6 and the second speed regulation motor 7 to avoid power interruption during gear shifting, but also can form a two-end speed regulation mode with the driving motor 1 to shorten the gear shifting time, further improve the one-time gear engagement success rate by accurately controlling the two-end speed, improve the comfort of the gear shifting process, reduce the turning radius during turning, and achieve zero abnormal sound. Moreover, because the driving assembly 1000 of the embodiment of the present disclosure can avoid power interruption during gear shifting, the range of vehicle conditions in which gear shifting is not possible or inappropriate is reduced, the vehicle can shift gears when climbing, the gear shifting process of the driving assembly 1000 of the embodiment of the present disclosure is suitable for various vehicle conditions, and thus the driving comfort of the vehicle is improved.

[0041] In some embodiments, the gear shifting transmission assembly 2 includes a dog clutch 21, a first gear driving gear 22, a second gear driving gear 23, a gear shifting driving member 24, a transmission shaft 25, a first gear driven gear 26, a second gear driven gear 27, and a transmission gear 28.

[0042] The dog clutch 21 has a clutch body and a combination tooth sleeve, the clutch body is sleeved on the driving output shaft 11, the combination tooth sleeve is slidably arranged on the clutch body, and when the driving motor 1 outputs power, the driving output shaft 11 drives the dog clutch 21 to rotate synchronously. The first gear driving gear 22 is sleeved on the driving output shaft 11, and the first gear driving gear 22 forms a first gear input end 201. The second gear driving gear 23 is sleeved on the driving output shaft 11, and the second gear driving gear 23 and the first gear driving gear 22 are located on the two sides of the dog clutch 21, respectively. The second gear driving gear 23 forms a second gear input end 202. The gear shifting driving member 24 is detachably connected with the combination tooth sleeve, so that when the gear shifting driving member 24 is connected with the combination tooth sleeve, the gear shifting driving member 24 drives the combination tooth sleeve to combine with the first gear driving gear 22 or the second gear driving gear 23.

[0043] In the neutral state, the shifting driving member 24 drives the combination tooth sleeve to combine with the first gear driving gear 22, realizing the combination of the clutch body and the first gear driving gear 22, that is, the combination of the dog clutch 21 and the first gear driving gear 22, so that the driving system 100 is switched from the neutral state to the first gear state. In the first gear state, the shifting driving member 24 drives the combination tooth sleeve to separate from the first gear driving gear 22, realizing the separation of the dog clutch 21 and the first gear driving gear 22, so that the driving system 100 is switched from the first gear state to the neutral state. In the neutral state, the shifting driving member 24 drives the combination tooth sleeve to combine with the second gear driving gear 23, realizing the combination of the clutch body and the second gear driving gear 23, that is, the combination of the dog clutch 21 and the second gear driving gear 23, so that the driving system 100 is switched from the neutral state to the second gear state. In the second gear state, the shifting driving member 24 drives the combination tooth sleeve to separate from the second gear driving gear 23, realizing the separation of the dog clutch 21 and the second gear driving gear 23, so that the driving system 100 is switched from the second gear state to the neutral state.

[0044] Compared with the friction clutch used as the switching component of the vehicle clutch shifting in the related art, since the friction clutch transmits torque through the friction force of combination, in the process of combination of the friction clutch and the gear, the speed of the two is passively adjusted to be consistent before starting to transmit torque, realizing the transmission of rotary power. The driving system 100 of the embodiment of the disclosure adopts the dog clutch 21, the clutch body is combined with the first gear driving gear 22 or the second gear driving gear 23 through the combination tooth sleeve, which is a non-friction form of combination, and after combination, the torque can be directly started to be transmitted, obviously shortening the time of speed synchronization, improving the efficiency of the combination of the clutch and the first gear driving gear 22 or the second gear driving gear 23, and further improving the shifting efficiency. Moreover, the structure of the dog clutch is relatively simple and small, the dog clutch 21 is combined with the first gear driving gear 22 or the second gear driving gear 23 through the combination tooth sleeve, the power transmission is reliable, there is no obvious jerk feeling during shifting, and the shifting comfort is better.

[0045] Therefore, the driving system 100 of the embodiment of the disclosure adopts the dog clutch 21 as the combination switching part of the clutch shifting, which can improve the shifting efficiency and comfort, and is beneficial to improving the reliability of the driving system 100 of the embodiment of the disclosure.

[0046] In some specific embodiments, the shifting driving member 24 includes a shifting motor and a shifting piece, the power output end of the shifting motor is connected to the shifting piece, the shifting motor drives the shifting piece to move and drives the combination tooth sleeve to move, realizing the combination and separation of the combination tooth sleeve and the first gear driving gear 22 and the second gear driving gear 23.

[0047] The transmission shaft 25 is rotatably arranged on the vehicle body, the first driven gear 26, the second driven gear 27 and the transmission gear 28 are sleeved on the transmission shaft 25, the first driven gear 26 is engaged with the first driving gear 22, the second driven gear 27 is engaged with the first driving gear 22, and the transmission gear 28 forms the speed change output end 203.

[0048] The transmission shaft 25 is fixedly connected with each of the first driven gear 26, the second driven gear 27 and the transmission gear 28, and the transmission shaft 25, the first driven gear 26, the second driven gear 27 and the transmission gear 28 rotate synchronously.

[0049] In some embodiments, the transmission gear 28 is located between the first driven gear 26 and the second driven gear 27. Thus, the differential assembly 3 connected with the transmission gear 28 is located between the first wheel 200 and the second wheel 300, the structure layout of the gear shifting and speed regulating assembly is compact and reasonable, and the structure layout of the driving system 100, the driving assembly 1000 and the vehicle is also facilitated.

[0050] In some specific embodiments, the diameter of the first driving gear 22 is smaller than the diameter of the second driving gear 23, and the diameter of the first driven gear 26 is greater than the diameter of the second driven gear 27. When the vehicle needs larger torque, the dog clutch 21 is combined with the first driving gear 22 to be in the first gear state, and when the vehicle needs larger speed, the dog clutch 21 is combined with the second driving gear 23 to be in the second gear state.

[0051] In some embodiments, the first speed regulating motor 6 is a first hub motor, the rotor of the first hub motor is coaxially arranged with the first output shaft 4, and the first hub motor is arranged on the first wheel 200.

[0052] The second speed regulating motor 7 is a second hub motor, the rotor of the second hub motor is coaxially arranged with the second output shaft 5, and the second hub motor is arranged on the second wheel 300.

[0053] The hub motor has the advantages of high power transmission efficiency, space saving and easy control, is convenient to install on the first wheel 200 and the second wheel 300, saves the space of the driving system 100, and is also conducive to the structure layout of the driving system 100, the driving assembly 1000 and the vehicle.

[0054] In some specific embodiments, the first hub motor and the second hub motor can adopt hub motors with smaller power, which can reduce the cost of the driving system 100 and the driving assembly 1000, and is conducive to reducing the cost of the vehicle.

[0055] In the description of the present disclosure, it needs to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present disclosure.

[0056] In addition, the terms "first", "second" are only for descriptive purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present disclosure, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0057] In the present disclosure, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected or can communicate with each other; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances.

[0058] In the present disclosure, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0059] In this disclosure, the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" mean that the particular feature, structure, material, or characteristic being described is included in at least one embodiment or example of the disclosure. Illustrative expressions of such terms do not necessarily refer to the same embodiment or example in this specification. Moreover, such terms do not necessarily refer to the same embodiment or example at all times, throughout the specification. Additionally, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples, without changing the scope of the disclosure. Furthermore, those skilled in the art can combine and combine the features of different embodiments or examples described in this specification and the features of different embodiments or examples, without changing the scope of the disclosure, if they do not contradict each other.

[0060] Although the embodiments of the disclosure have been shown and described above, it is understood that the above-described embodiments are exemplary and are not to be construed as limiting the disclosure, and those skilled in the art can make changes, modifications, replacements and variations to the above-described embodiments within the scope of the disclosure.

[0061] All embodiments of the disclosure can be executed alone or in combination with other embodiments, and are considered to be within the scope of protection required by the disclosure.

Claims

1. A drive system characterized by, The drive system comprises: a drive motor having a neutral state, a first gear state and a second gear state, the drive motor having a drive output shaft; a gear shifting assembly having a first gear input end, a second gear input end and a gear output end, in the first gear state, the drive output shaft is combined with the first gear input end, in the second gear state, the drive output shaft is combined with the second gear input end; a differential assembly connected with the gear output end; a first output shaft and a second output shaft distributed on both sides of the differential assembly and connected with the differential assembly; a first speed regulating motor connected with the first output shaft and a second speed regulating motor connected with the second output shaft.

2. The drive system of claim 1, wherein, The gear shifting assembly comprises: a dog clutch having a clutch body and a combination tooth sleeve, the clutch body is sleeved on the drive output shaft, the combination tooth sleeve is slidably arranged on the clutch body; a first gear driving gear, the first gear driving gear is hollowly sleeved on the drive output shaft, the first gear driving gear forms the first gear input end; a second gear driving gear, the second gear driving gear is hollowly sleeved on the drive output shaft, the second gear driving gear and the first gear driving gear are respectively located on both sides of the dog clutch, the second gear driving gear forms the second gear input end; and a gear shifting driving member, the gear shifting driving member is disengagably connected with the combination tooth sleeve, when the gear shifting driving member is connected with the combination tooth sleeve, the gear shifting driving member drives the combination tooth sleeve to be combined with the first gear driving gear or the second gear driving gear.

3. The drive system of claim 2, wherein, The gear shifting assembly comprises a transmission shaft, a first gear driven gear, a second gear driven gear and a transmission gear, the first gear driven gear, the second gear driven gear and the transmission gear are all sleeved on the transmission shaft, the first gear driven gear is engaged with the first gear driving gear, the second gear driven gear is engaged with the first gear driving gear, and the transmission gear forms the gear output end.

4. The drive system of claim 3, wherein, The transmission gear is located between the first gear driven gear and the second gear driven gear.

5. The drive system according to any one of claims 1 to 4, characterized by, The first speed regulating motor is a first hub motor, a rotor of the first hub motor is coaxially arranged with the first output shaft.

6. The drive system according to any one of claims 1 to 5, characterized by, The second speed regulating motor is a second hub motor, a rotor of the second hub motor is coaxially arranged with the second output shaft.

7. A drive assembly characterized by, The drive system, a first wheel and a second wheel are included, the first wheel is arranged on the first output shaft, the second wheel is arranged on the second output shaft, wherein the first speed regulating motor of the drive system is connected with the first wheel, and the second speed regulating motor of the drive system is connected with the second wheel.

8. A vehicle drive method characterized by The vehicle driving method using the driving assembly of claim 7 is as follows: when shifting gears, the driving output shaft of the driving motor is switched to neutral state first, the first and second speed regulating motors are started, the rotation speed of the first and second gear input ends is changed, the rotation speed difference between one of the first and second gear input ends and the driving output shaft is reduced, and then the one of the first and second gear input ends is combined with the driving output shaft to complete gear engagement.

9. A vehicle drive method characterized by The vehicle driving method using the driving assembly of claim 7 is as follows: when the vehicle is turning, the first and second speed regulating motors are started, the first speed regulating motor increases the rotation speed of the first wheel and the second speed regulating motor decreases the rotation speed of the second wheel, or the first speed regulating motor decreases the rotation speed of the first wheel and the second speed regulating motor increases the rotation speed of the second wheel, so that the speed of the wheel on the inside of the curve is reduced and the speed of the wheel on the outside of the curve is increased.

10. A vehicle characterized by comprising: The vehicle includes a vehicle body and the driving assembly of claim 7, which is arranged on the vehicle body.

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