Driving system and vehicle

Abstract

The driving system comprises a first driving assembly, a first driving shaft, a second driving shaft and a first transmission assembly, the first driving shaft and the second driving shaft are arranged in the left-right direction and extend in the left-right direction, and the first driving shaft and the second driving shaft are used for being connected with wheels. The first driving assembly is in transmission connection with the first driving shaft and the second driving shaft through a first transmission assembly, the first transmission assembly comprises a differential mechanism, and the differential mechanism and the first driving shaft are arranged in the front-back direction. According to the driving system, the ball cage pitch on the first driving shaft and the ball cage pitch on the second driving shaft can be increased, so that the swing angle of the first driving shaft and the swing angle of the second driving shaft can be reduced when the wheels jump, damage to the first driving shaft and the second driving shaft in the wheel jumping process can be reduced, and the service life of the wheels is prolonged. And the service life of the first driving shaft and the second driving shaft is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular to a drive system and a vehicle. Background Art

[0002] With the continuous development of the new energy vehicle industry, more and more models are gradually equipped with multi-motor drive systems. However, the layout of the drive system is irrational, resulting in a large span between the reducers on the left and right drive shafts and a small pitch of the drive shaft ball joints. This results in a large angle of up and down swing of the drive shaft when the wheels jump up and down, which can easily lead to damage to the drive shaft. Therefore, there is room for improvement. Summary of the Invention

[0003] A first aspect of the present invention provides a drive system, which has the advantage of reducing damage to a first drive shaft and a second drive shaft during wheel bouncing.

[0004] According to an embodiment of the first aspect of the present invention, the drive system includes: a first drive assembly; a first drive shaft and a second drive shaft, the first drive shaft and the second drive shaft are arranged in the left-right direction and both extend in the left-right direction, the first drive shaft and the second drive shaft are used to connect to the wheels; a first transmission assembly, the first drive assembly is connected to the first drive shaft and the second drive shaft through the first transmission assembly, the first transmission assembly includes a differential, and the differential and the first drive shaft are arranged in the front-to-back direction.

[0005] According to the drive system of the first aspect of the present invention, by arranging the differential and the first drive shaft in the front-to-rear direction, the span between the reduction mechanism arranged on the first drive shaft and the reduction mechanism arranged on the second drive shaft in the left-to-right direction can be reduced, and the pitch of the ball cages on the first drive shaft and the second drive shaft can be increased, so that when the wheel bounces, the swing angle of the first drive shaft and the second drive shaft can be reduced, thereby reducing the damage to the first drive shaft and the second drive shaft during the wheel bouncing process, which is conducive to extending the service life of the first drive shaft and the second drive shaft.

[0006] According to some embodiments of the present invention, the first transmission assembly includes: a first reduction mechanism and a second reduction mechanism, the differential is connected to the first drive shaft through the first reduction mechanism, and the differential is connected to the second drive shaft through the second reduction mechanism.

[0007] According to some embodiments of the present invention, the first reduction mechanism includes a first input gear provided on the first drive shaft, the second reduction mechanism includes a second input gear provided on the second drive shaft, and the distance between the end face of the first input gear facing away from the second input gear and the end face of the second input gear facing away from the first input gear is in the range of 280 mm to 400 mm.

[0008] According to some embodiments of the present invention, the first reduction mechanism and the second reduction mechanism are located on the left and right sides of the differential.

[0009] According to some embodiments of the present invention, the differential includes a first output shaft and a second output shaft, the first output shaft is provided with a first output gear, the second output shaft is provided with a second output gear, the first output gear is transmission-connected to the first reduction mechanism, and the second output gear is transmission-connected to the second reduction mechanism.

[0010] According to some embodiments of the present invention, the first reduction mechanism includes a first intermediate gear and a first input gear, the first intermediate gear is engaged with the first output gear and the first input gear, and the first input gear is provided on the first drive shaft; the second reduction mechanism includes a second intermediate gear and a second input gear, the second intermediate gear is engaged with the second output gear and the second input gear, and the second input gear is provided on the second drive shaft.

[0011] According to some embodiments of the present invention, the first output gear, the first intermediate gear and the first input gear are arranged in sequence from front to back, and the second output gear, the second intermediate gear and the second input gear are arranged in sequence from front to back.

[0012] According to some embodiments of the present invention, the drive system also includes a first synchronization lock, and the first drive shaft is connected to the second drive shaft through the first synchronization lock. The first synchronization lock has a locked state and an unlocked state. In the locked state, the first drive shaft and the second drive shaft are relatively fixed. In the unlocked state, the first drive shaft and the second drive shaft can move relatively independently.

[0013] According to some embodiments of the present invention, the first reduction mechanism includes a first input gear provided on the first drive shaft, the second reduction mechanism includes a second input gear provided on the second drive shaft, and the first synchronization lock is connected between the first input gear and the second input gear.

[0014] According to some embodiments of the present invention, the first driving assembly includes an engine, and the engine is drivingly connected to the differential.

[0015] According to some embodiments of the present invention, the first transmission assembly includes a reduction gear set, and the output shaft of the engine is suitable for being drivingly connected to the differential via the reduction gear set.

[0016] According to some embodiments of the present invention, the reduction gear set includes a plurality of transmission gears and a third output gear, the output shaft of the engine is suitable for being transmission-connected to the third output gear through the plurality of transmission gears, the transmission gears are spur gears, the third output gear is a helical gear, and the reduction gear set is transmission-connected to the differential through the third output gear.

[0017] According to some embodiments of the present invention, the first drive assembly further comprises a generator, the output shaft of the engine is adapted to be drivingly connected to the input shaft of the generator, and the output shaft of the engine is adapted to be drivingly connected to the differential via the reduction gear set.

[0018] According to some embodiments of the present invention, the generator is located above the differential, and along the front-rear direction, the reduction gear set is located on a side of the differential and the generator facing away from the first drive shaft.

[0019] According to some embodiments of the present invention, a first clutch is provided between the generator and the reduction gear set.

[0020] According to some embodiments of the present invention, a second clutch is provided between the engine and the generator.

[0021] According to some embodiments of the present invention, the first drive assembly further includes a first drive motor and a second drive motor, and the first transmission assembly further includes a first reduction mechanism and a second reduction mechanism, the first drive motor is connected to the first drive shaft through the first reduction mechanism, and the second drive motor is connected to the second drive shaft through the second reduction mechanism.

[0022] According to some embodiments of the present invention, the first reduction mechanism and the second reduction mechanism are located between the first drive motor and the second drive motor.

[0023] According to some embodiments of the present invention, the first reduction mechanism includes a first intermediate gear, a first input gear and a third intermediate gear, the first intermediate gear is coaxially arranged and fixedly connected to the third intermediate gear, the first intermediate gear is meshed with the first input gear, the first input gear is arranged on the first drive shaft, and the output shaft of the first drive motor is transmission-connected to the third intermediate gear; the second reduction mechanism includes a second intermediate gear, a second input gear and a fourth intermediate gear, the second intermediate gear is coaxially arranged and fixedly connected to the fourth intermediate gear, the output shaft of the second drive motor is transmission-connected to the fourth intermediate gear, the second intermediate gear is meshed with the second input gear, and the second input gear is arranged on the second drive shaft; wherein, the third intermediate gear and the fourth intermediate gear are located between the first intermediate gear and the second intermediate gear.

[0024] According to some embodiments of the present invention, the first drive motor and the second drive motor are located on the left and right sides of the differential, and the differential is located below the output shafts of the first drive motor and the second drive motor.

[0025] According to some embodiments of the present invention, the first reduction mechanism includes a first drive gear, which is provided on the output shaft of the first drive motor; the second reduction mechanism includes a second drive gear, which is provided on the output shaft of the second drive motor; and at least portions of the first drive gear and the second drive gear are located directly above the differential.

[0026] According to some embodiments of the present invention, the first transmission assembly further includes a reduction gear set, the first drive assembly further includes a generator, the output shaft of the engine is suitable for being transmission-connected to the input shaft of the generator, the output shaft of the generator is suitable for being transmission-connected to the differential through the reduction gear set, and a first clutch is provided between the generator and the reduction gear set.

[0027] According to some embodiments of the present invention, the first drive motor and the second drive motor are located on the left and right sides of the generator.

[0028] According to some embodiments of the present invention, the drive system further includes an outer shell, and the first drive motor, the second drive motor, the first reduction mechanism, the second reduction mechanism, the differential, the generator and the reduction gear set are all arranged in the outer shell, and an input socket and two output sockets are formed on the outer shell, the output shaft of the engine is passed through the input socket to be transmission-connected to the input shaft of the generator, the first drive shaft is passed through one of the output sockets to be transmission-connected to the first reduction mechanism, and the second drive shaft is passed through the other output socket to be transmission-connected to the second reduction mechanism.

[0029] According to some embodiments of the present invention, the drive system has at least a first mode, a second mode, a third mode and a fourth mode; wherein, in the first mode, the first clutch is disengaged, the first drive motor and the second drive motor are started, and the engine and the generator are stopped; in the second mode, the first clutch is disengaged, and the first drive motor, the second drive motor, the engine and the generator are all started; in the third mode, the first clutch is engaged, and the first drive motor, the second drive motor, the engine and the generator are all started; in the fourth mode, the first clutch is engaged, the engine is started, and the first drive motor, the second drive motor and the generator are stopped.

[0030] According to some embodiments of the present invention, the drive system further includes a power battery, and the first drive motor and the second drive motor are both electrically connected to the power battery.

[0031] According to some embodiments of the present invention, along the front-rear direction, the power battery is located on a side of the first drive shaft and the second drive shaft that is away from the first drive assembly.

[0032] According to some embodiments of the present invention, the engine is arranged in a longitudinal direction, the first drive motor is arranged in a transverse direction, and the second drive motor is arranged in a transverse direction.

[0033] According to some embodiments of the present invention, the drive system further includes: a second drive assembly, the second drive assembly and the first drive assembly are arranged at intervals in the front-to-rear direction, the second drive assembly includes a third drive motor and a fourth drive motor; a third drive shaft and a fourth drive shaft, the third drive shaft and the fourth drive shaft are arranged in the left-right direction and both extend in the left-right direction, the third drive shaft and the fourth drive shaft are used to connect to the wheels; a second transmission assembly, including a third reduction mechanism and a fourth reduction mechanism, the third drive motor is connected to the third drive shaft through the third reduction mechanism, and the fourth drive motor is connected to the fourth drive shaft through the fourth reduction mechanism.

[0034] According to some embodiments of the present invention, the drive system also includes a second synchronization lock, and the third drive shaft is connected to the third drive shaft through the second synchronization lock. The second synchronization lock has a locked state and an unlocked state. In the locked state, the third drive shaft and the fourth drive shaft are relatively fixed. In the unlocked state, the third drive shaft and the fourth drive shaft can move relatively independently.

[0035] According to some embodiments of the present invention, the drive system further includes a power battery, which is located between the first drive assembly and the second drive assembly. The first drive assembly includes an engine, a first drive motor and a second drive motor. The engine is transmission-connected to the differential, the first drive motor is transmission-connected to the first drive shaft, and the second drive motor is transmission-connected to the second drive shaft. The first drive motor, the second drive motor, the third drive motor and the fourth drive motor are all electrically connected to the power battery.

[0036] A second aspect of the present invention provides a vehicle.

[0037] A vehicle according to an embodiment of the second aspect of the present invention includes: the above-mentioned drive system.

[0038] According to the vehicle of the second aspect of the present invention, by arranging the differential and the first drive shaft in the front-to-rear direction, the span between the reduction mechanism arranged on the first drive shaft and the reduction mechanism arranged on the second drive shaft in the left-to-right direction can be reduced, and the pitch of the ball cages on the first drive shaft and the second drive shaft can be increased, so that when the wheel bounces, the swing angle of the first drive shaft and the second drive shaft can be reduced, thereby reducing the damage to the first drive shaft and the second drive shaft during the wheel bounce process, which is conducive to extending the service life of the first drive shaft and the second drive shaft.

[0039] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 is a schematic diagram of a driving system according to a first embodiment of the present invention;

[0041] Figure 2 is a schematic diagram of a drive system according to a second embodiment of the present invention;

[0042] Figure 3 is a schematic diagram of a drive system according to a third embodiment of the present invention;

[0043] Figure 4is a schematic diagram of a partial structure of a drive system according to an embodiment of the present invention;

[0044] Figure 5 is a schematic diagram of a first drive motor, a second drive motor, a first reduction mechanism, and a second reduction mechanism of a drive system according to an embodiment of the present invention;

[0045] Figure 6 is a schematic diagram of a differential, a first output gear, and a second output gear of a drive system according to an embodiment of the present invention;

[0046] Figure 7 is a schematic diagram of a generator, a first clutch, and a reduction gear set of a drive system according to an embodiment of the present invention;

[0047] Figure 8 is an axonometric view of an outer shell of a drive system according to an embodiment of the present invention;

[0048] Figure 9 is a side view of an outer shell of a drive system according to an embodiment of the present invention;

[0049] Figure 10 is a front view of an outer shell of a drive system according to an embodiment of the present invention;

[0050] Figure 11 is a control flow chart of a driving system according to an embodiment of the present invention.

[0051] Reference numerals:

[0052] 100. Drive system;

[0053] 1. Engine;

[0054] 21a, first drive motor; 22a, first reduction gear; 221a, first intermediate gear; 222a, first input gear; 223a, first drive gear; 224a, third intermediate gear;

[0055] 21b, second drive motor; 22b, second reduction gear; 221b, second intermediate gear; 222b, second input gear; 223b, second drive gear; 224b, fourth intermediate gear;

[0056] 21c, third drive motor; 22c, third speed reduction mechanism;

[0057] 21d, fourth drive motor; 22d, fourth speed reduction mechanism;

[0058] 3a, first drive shaft; 3b, second drive shaft; 3c, third drive shaft; 3d, fourth drive shaft;

[0059] 4. Differential; 41. First output shaft; 42. Second output shaft; 43. First output gear; 44. Second output gear;

[0060] 5. Reduction gear set; 51. Transmission gear; 52. Third output gear;

[0061] 6. Generator; 7a. First clutch; 7b. Second clutch;

[0062] 8. Outer shell; 81. Input socket; 82. Output socket;

[0063] 9a, first synchronization lock; 9b, second synchronization lock;

[0064] 10. Power battery; 20. Wheels. DETAILED DESCRIPTION

[0065] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limiting the present invention.

[0066] The disclosure below provides many different embodiments or examples for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but those skilled in the art will appreciate the applicability of other processes and / or the use of other materials.

[0067] The following describes a drive system 100 according to an embodiment of the first aspect of the present invention with reference to the accompanying drawings.

[0068] like Figures 1 to 4 As shown, the drive system 100 according to the embodiment of the first aspect of the present invention includes: a first drive component, a first drive shaft 3a, a second drive shaft 3b and a first transmission component. The first drive shaft 3a and the second drive shaft 3b are arranged in the left and right directions and both extend in the left and right directions. The first drive shaft 3a and the second drive shaft 3b are used to connect with the wheels 20. The first drive component is connected to the first drive shaft 3a and the second drive shaft 3b through the first transmission component. The differential 4 and the first drive shaft 3a are arranged in the front and rear directions.

[0069] That is, the first drive assembly can transmit power to the first drive shaft 3a and the second drive shaft 3b through the differential 4, and the first drive shaft 3a and the second drive shaft 3b can rotate at different speeds through the differential 4. Since the differential 4 and the first drive shaft 3a are arranged in the front-to-back direction, that is, the first drive shaft 3a and the second drive shaft 3b are both located in front of or behind the differential 4, the reduction gear mechanism arranged on the first drive shaft 3a and the reduction gear mechanism arranged on the second drive shaft 3b can be arranged in the front-to-back direction with the differential 4. This can prevent the differential 4 from occupying the space between the reduction gear mechanism arranged on the first drive shaft 3a and the reduction gear mechanism arranged on the second drive shaft 3b, thereby reducing the span in the left-right direction between the reduction gear mechanism arranged on the first drive shaft 3a and the reduction gear mechanism arranged on the second drive shaft 3b.

[0070] Secondly, it is understood that the two ends of the first drive shaft 3a are connected to the wheel on one side and the reduction mechanism arranged on the first drive shaft 3a via a ball joint, and the two ends of the second drive shaft 3b are connected to the wheel 20 on the other side and the reduction mechanism arranged on the second drive shaft 3b via a ball joint. Therefore, by reducing the span in the left-right direction between the reduction mechanism arranged on the first drive shaft 3a and the reduction mechanism arranged on the second drive shaft 3b, the pitch of the ball joints on the first drive shaft 3a and the second drive shaft 3b can be increased, thereby reducing the swing angle of the first drive shaft 3a and the second drive shaft 3b when the wheel 20 bounces, thereby reducing damage to the first drive shaft 3a and the second drive shaft 3b during the wheel 20 bounce, which helps to extend the service life of the first drive shaft 3a and the second drive shaft 3b.

[0071] In addition, the space occupied by the first transmission assembly on the first drive shaft 3a and the second drive shaft 3b in the left and right directions can be reduced, thereby reducing the risk of interference between the first transmission assembly and structures such as the suspension on the wheel 20 side, thereby reducing the difficulty of arranging the drive system 100 on the vehicle.

[0072] According to the drive system 100 of the first aspect embodiment of the present invention, by arranging the differential 4 and the first drive shaft 3a in the front-to-rear direction, the span in the left-right direction between the reduction mechanism arranged on the first drive shaft 3a and the reduction mechanism arranged on the second drive shaft 3b can be reduced, and the pitch of the ball cages on the first drive shaft 3a and the second drive shaft 3b can be increased, so that when the wheel 20 bounces, the swing angle of the first drive shaft 3a and the second drive shaft 3b can be reduced, and the damage to the first drive shaft 3a and the second drive shaft 3b during the bouncing of the wheel 20 can be reduced, which is conducive to extending the service life of the first drive shaft 3a and the second drive shaft 3b.

[0073] It should be noted that the drive system 100 can be arranged at the front of the vehicle, and the first drive shaft 3a and the second drive shaft 3b can be respectively connected to the two wheels 20 on the front side of the vehicle, that is, the vehicle can be a front-wheel drive model; the drive system 100 can also be arranged at the rear of the vehicle, and the first drive shaft 3a and the second drive shaft 3b can also be respectively connected to the two wheels 20 on the rear side of the vehicle, that is, the vehicle can be a rear-wheel drive model. There is no specific restriction on the installation position of the drive system 100 and the vehicle model.

[0074] According to some embodiments of the present invention, the first transmission assembly includes: a first reduction mechanism 22a and a second reduction mechanism 22b. The differential 4 is connected to the first drive shaft 3a via the first reduction mechanism 22a, and the differential 4 is connected to the second drive shaft 3b via the second reduction mechanism 22b. In other words, the first drive shaft 3a and the second drive shaft 3b are each equipped with a corresponding reduction mechanism. The first reduction mechanism 22a is connected between the differential 4 and the first drive shaft 3a, thereby increasing the torque transmitted to the first drive shaft 3a by the first reduction mechanism 22a. The second reduction mechanism 22b is connected between the differential 4 and the second drive shaft 3b, thereby increasing the torque transmitted to the second drive shaft 3b by the second reduction mechanism 22b, thereby meeting the high torque requirements of the vehicle in scenarios such as starting and climbing.

[0075] According to some embodiments of the present invention, the first reduction mechanism 22a includes a first input gear 222a provided on the first drive shaft 3a, the second reduction mechanism 22b includes a second input gear 222b provided on the second drive shaft 3b, and the spacing range between the end face of the first input gear 222a facing away from the second input gear 222b and the end face of the second input gear 222b facing away from the first input gear 222a (e.g., Figure 9 The W2 shown in FIG is 280 mm to 400 mm. That is, the span of the first input gear 222a and the second input gear 222b in the left-right direction is controlled within a range of 280 mm to 400 mm. This can avoid the first drive shaft 3a and the second drive shaft 3b being too short due to an excessive span of the first input gear 222a and the second input gear 222b in the left-right direction, and can also avoid the increased difficulty in layout due to an excessive span of the first input gear 222a and the second input gear 222b in the left-right direction. Thus, while controlling the span of the first input gear 222a and the second input gear 222b in the left-right direction, the layout difficulty of the drive system 100 can be reduced. For example, the span of the first input gear 222a and the second input gear 222b in the left-right direction can be 280 mm, 290 mm, 300 mm, 310 mm, 320 mm, 330 mm, 350 mm, 370 mm, 390 mm, 400 mm, etc., without specific limitation here.

[0076] In some embodiments, the first input gear 222a is connected to the second input gear 222b through the first synchronization lock 9a, and the first synchronization lock 9a is arranged between the first input gear 222a and the second input gear 222b. By controlling the span of the first input gear 222a and the second input gear 222b in the left and right directions to be no less than 280mm, sufficient layout space can be reserved for the first synchronization lock 9a.

[0077] In one specific example, the first drive shaft 3a and the second drive shaft 3b are coaxially arranged and located behind the differential 4, and the first input gear 222a and the second input gear 222b are both located behind the differential 4. This means that there is no need to reserve space between the first input gear 222a and the second input gear 222b for the differential 4, which can reduce the distance between the first input gear 222a and the second input gear 222b, and also reduce the span between the first input gear 222a and the second input gear 222b in the left-right direction. One end of the first drive shaft 3a is connected to one wheel 20 via a C-V joint, and the other end of the first drive shaft 3a is connected to the first input gear 222a via a C-V joint. One end of the second drive shaft 3b is connected to the other wheel 20 via a C-V joint, and the other end of the second drive shaft 3b is connected to the second input gear 222b via a C-V joint. Therefore, by reducing the span of the first input gear 222a and the second input gear 222b in the left and right directions, the distance between the ball cages at both ends of the first drive shaft 3a can be increased. At the same time, the distance between the ball cages at both ends of the second drive shaft 3b can be increased, that is, the pitch of the ball cages on the first drive shaft 3a and the second drive shaft 3b can be increased. On the basis of the same jumping height of the wheel 20, the swing angle of the first drive shaft 3a relative to the first input gear 222a and the swing angle of the second drive shaft 3b relative to the second input gear 222b are smaller, that is, the swing angle of the first drive shaft 3a and the second drive shaft 3b can be reduced to avoid damage to the first drive shaft 3a and the second drive shaft 3b caused by excessive swing angles.

[0078] According to some embodiments of the present invention, the first reduction mechanism 22a and the second reduction mechanism 22b are located on the left and right sides of the differential 4. In other words, the differential 4 is arranged between the first reduction mechanism 22a and the second reduction mechanism 22b. This allows the first reduction mechanism 22a and the second reduction mechanism 22b to fully utilize the space on the left and right sides of the differential 4, preventing interference between the first reduction mechanism 22a and the second reduction mechanism 22b, and facilitating transmission connection between the differential 4, the first reduction mechanism 22a, and the second reduction mechanism 22b.

[0079] According to some embodiments of the present invention, Figure 4-Figure 6As shown, the differential 4 includes a first output shaft 41 and a second output shaft 42. The first output shaft 41 is provided with a first output gear 43, and the second output shaft 42 is provided with a second output gear 44. The first output gear 43 is drivingly connected to the first reduction mechanism 22a, and the second output gear 44 is drivingly connected to the second reduction mechanism 22b. In other words, the differential 4 is drivingly connected to the first output gear 43 via the first output shaft 41, and the first output gear 43 is drivingly connected to the first drive shaft 3a via the first reduction mechanism 22a. The differential 4 is drivingly connected to the second output gear 44 via the second output shaft 42, and the second output gear 44 is drivingly connected to the second drive shaft 3b via the second reduction mechanism 22b. In other words, the differential 4 transmits power to the first drive shaft 3a and the second drive shaft 3b via the first output shaft 41 and the second output shaft 42, respectively, to ensure that the first drive shaft 3a and the second drive shaft 3b can form differential rotation.

[0080] Furthermore, the first output shaft 41 and the second output shaft 42 are located on the left and right sides of the differential 4. By arranging the first reduction mechanism 22a and the second reduction mechanism 22b on the left and right sides of the differential 4, the first output gear 43 on the first output shaft 41 can be arranged on the same side of the differential 4 as the first reduction mechanism 22a, and the second output gear 44 on the second output shaft 42 can be arranged on the same side of the differential 4 as the second reduction mechanism 22b. This reduces the difficulty of the transmission connection between the first output gear 43 and the first reduction mechanism 22a, and reduces the difficulty of the transmission connection between the second output gear 44 and the second reduction mechanism 22b, thereby reducing the difficulty of arranging the drive system 100.

[0081] According to some embodiments of the present invention, the first reduction mechanism 22a includes a first intermediate gear 221a and a first input gear 222a, wherein the first intermediate gear 221a meshes with the first output gear 43 and the first input gear 222a, and the first input gear 222a is disposed on the first drive shaft 3a; and the second reduction mechanism 22b includes a second intermediate gear 221b and a second input gear 222b, wherein the second intermediate gear 221b meshes with the second output gear 44 and the second input gear 222b, and the second input gear 222b is disposed on the second drive shaft 3b. Thus, the number of gears transmitted between the first output shaft 41 and the first drive shaft 3a can be effectively reduced, while the number of gears transmitted between the second output shaft 42 and the second drive shaft 3b can also be reduced, thereby improving the efficiency of power transmission and reducing the cost of the first transmission assembly.

[0082] According to some embodiments of the present invention, the first output gear 43, the first intermediate gear 221a, and the first input gear 222a are arranged sequentially from front to back, while the second output gear 44, the second intermediate gear 221b, and the second input gear 222b are arranged sequentially from front to back. That is, the first output gear 43 and the first input gear 222a are located on opposite sides of the first intermediate gear 221a in the front-to-back direction, while the second output gear 44 and the second input gear 222b are located on opposite sides of the second intermediate gear 221b in the front-to-back direction. This ensures that the first intermediate gear 221a simultaneously meshes with the first output gear 43 and the first input gear 222a, while reducing the space occupied by the first intermediate gear 221a in the left-right direction when mated with the first output gear 43 and the first input gear 222a. Furthermore, while ensuring that the second intermediate gear 221b simultaneously meshes with the second output gear 44 and the second input gear 222b, reducing the space occupied by the second intermediate gear 221b in the left-to-right direction when mated with the second output gear 44 and the second input gear 222b. In this way, the width of the first transmission assembly can be reduced to reduce the difficulty of layout.

[0083] According to some embodiments of the present invention, the drive system 100 further includes a first synchronization lock 9a, through which the first drive shaft 3a is connected to the second drive shaft 3b. The first synchronization lock 9a has a locked state and an unlocked state. In the locked state, the first drive shaft 3a and the second drive shaft 3b are relatively fixed. In the unlocked state, the first drive shaft 3a and the second drive shaft 3b can move independently of each other. Therefore, by controlling the first synchronization lock 9a to switch to the locked state, the first drive shaft 3a and the second drive shaft 3b are connected and rotated synchronously, and the first drive shaft 3a and the second drive shaft 3b can be coupled to each other, thereby facilitating the vehicle to escape from obstacles in off-road driving environments. At the same time, by controlling the first synchronization lock 9a to switch to the unlocked state, the first drive shaft 3a and the second drive shaft 3b can rotate independently, thereby forming a differential rotation between the first drive shaft 3a and the second drive shaft 3b. In addition, when the first drive shaft 3a and the second drive shaft 3b both have corresponding and independent power inputs, the first drive shaft 3a and the second drive shaft 3b can rotate in opposite directions, thereby achieving functions such as turning around in place.

[0084] According to some embodiments of the present invention, the first reduction mechanism 22a includes a first input gear 222a provided on the first drive shaft 3a, the second reduction mechanism 22b includes a second input gear 222b provided on the second drive shaft 3b, and the first synchronization lock 9a is connected between the first input gear 222a and the second input gear 222b. In other words, the first synchronization lock 9a can control the connection between the first input gear 222a and the second input gear 222b to synchronize the rotation of the first input gear 222a and the second input gear 222b, thereby achieving synchronized rotation of the first drive shaft 3a and the second drive shaft 3b. The first synchronization lock 9a can control the disconnection between the first input gear 222a and the second input gear 222b to enable the first input gear 222a and the second input gear 222b to rotate relatively independently, thereby achieving independent rotation of the first drive shaft 3a and the second drive shaft 3b. In other words, the first synchronization lock 9a controls the connection or disconnection between the first input gear 222a and the second output gear 44 to control the connection or disconnection between the first drive shaft 3a and the second drive shaft 3b. Furthermore, by disposing the first synchronization lock 9a between the first input gear 222a and the second input gear 222b, it is possible to reduce the difficulty in connecting the first synchronization lock 9a with the first input gear 222a and the second input gear 222b.

[0085] According to some embodiments of the present invention, the first drive assembly includes an engine 1, which is drivingly connected to a differential 4. That is, the engine 1 is drivingly connected to the first drive shaft 3a and the second drive shaft 3b through the differential 4, so as to transmit power to the first drive shaft 3a and the second drive shaft 3b respectively through the differential 4.

[0086] According to some embodiments of the present invention, Figure 4 and Figure 7 As shown, the first transmission assembly includes a reduction gear set 5, and the output shaft of the engine 1 is adapted to be drivingly connected to the differential 4 via the reduction gear set 5. Thus, the reduction gear set 5 can increase the torque transmitted from the engine 1 to the differential 4, thereby increasing the torque transmitted to the first drive shaft 3a and the second drive shaft 3b via the differential 4 to meet the power requirements of the vehicle.

[0087] According to some embodiments of the present invention, the reduction gear set 5 includes a plurality of transmission gears 51 and a third output gear 52. The output shaft of the engine 1 is suitable for transmission connection with the third output gear 52 through the plurality of transmission gears 51. The transmission gears 51 are spur gears, and the third output gear 52 is a helical gear. The reduction gear set 5 is transmission connected to the differential 4 through the third output gear 52. That is, the reduction gear set 5 is composed of a plurality of spur gears and a helical gear, wherein the driving direction can be adjusted by the third output gear 52 to facilitate the transmission connection between the engine 1 and the differential 4. By using spur gears as the transmission gears 51, the transmission efficiency of the reduction gear set 5 can be improved, thereby improving the efficiency of the engine 1 directly driving the differential 4. In a specific example, as Figure 7 As shown, the third output gear 52 is coaxially arranged and fixedly connected to the adjacent transmission gear 51 , and the rotation axis of the third output gear 52 extends in the front-to-back direction to better adapt to the longitudinally arranged engine 1 .

[0088] According to some embodiments of the present invention, the first drive assembly further includes a generator 6, and the output shaft of the engine 1 is adapted to be drivingly connected to the input shaft of the generator 6, and the output shaft of the engine 1 is adapted to be drivingly connected to the differential 4 via the reduction gear set 5. Therefore, the transmission connection between the generator 6 and the engine 1 can drive the output shaft of the engine 1 to rotate, thereby starting the engine 1, and the generator 6 can be used to start the engine 1. At the same time, the transmission connection between the engine 1 and the generator 6 can be used to synchronously drive the input shaft of the generator 6 to rotate when the output shaft of the engine 1 rotates, thereby causing the generator 6 to generate electricity.

[0089] In one specific example, the input shaft and output shaft of the generator 6 are the same shaft and extend in the front-to-back direction. For example, the two ends of the shaft of the generator 6 extend from the front and back sides respectively. The engine 1 is located at the rear side of the generator 6, and the reduction gear set 5 is located at the front side of the generator 6. In addition, the generator 6 is electrically connected to the power battery 10, so that the power battery 10 can be charged by the operation of the generator 6.

[0090] According to some embodiments of the present invention, the generator 6 is located above the differential 4, and the reduction gear set 5 is located on the side of the differential 4 and the generator 6 facing away from the first drive shaft 3a in the front-to-back direction. In other words, in the front-to-back direction, the reduction gear set 5 is located on one side of the differential 4, while the first drive shaft 3a and the second drive shaft 3b are located on the other side of the differential 4. This prevents interference between the reduction gear set 5 and the transmission mechanism connecting the differential 4 and the first drive shaft 3a and the second drive shaft 3b, while facilitating the transmission connection between the differential 4 and the reduction gear set 5, the first drive shaft 3a, and the second drive shaft 3b. Positioning the generator 6 above the differential 4 provides more space for the transmission connection between the generator 6 and the engine 1, thereby reducing the difficulty of arranging the engine 1.

[0091] According to some embodiments of the present invention, a first clutch 7a is provided between the generator 6 and the reduction gear set 5. Thus, the first clutch 7a can be used to control the transmission connection or disconnection between the generator 6 and the differential 4 to adapt to different driving requirements of the vehicle. In one specific example, the first clutch 7a is provided between the output shaft of the generator 6 and the reduction gear set 5. When the engine 1 is driving the generator 6 to generate electricity, the first clutch 7a can disconnect the reduction gear set 5 from the output shaft of the generator 6. This prevents the reduction gear set 5 from generating drag on the rotation of the output shaft of the generator 6, thereby improving the power generation efficiency of the generator 6.

[0092] According to some embodiments of the present invention, a second clutch 7b is provided between the engine 1 and the generator 6. That is, the second clutch 7b can control the engagement or disengagement of the output shaft of the engine 1 and the input shaft of the generator 6. Thus, by controlling the engagement of the output shaft of the engine 1 with the input shaft of the generator 6, a transmission connection between the engine 1 and the generator 6 can be achieved, thereby driving the generator 6 to generate electricity or directly drive the differential 4 to deliver power. Alternatively, by controlling the disengagement of the output shaft of the engine 1 from the input shaft of the generator 6, for example, when power is delivered to the differential 4 via the generator 6, drag resistance from the output shaft of the engine 1 on the rotation of the input shaft of the generator 6 can be avoided, thereby reducing power loss.

[0093] According to some embodiments of the present invention, the first drive assembly further includes a first drive motor 21a and a second drive motor 21b, and the first transmission assembly further includes a first reduction mechanism 22a and a second reduction mechanism 22b. The first drive motor 21a is in transmission connection with the first drive shaft 3a via the first reduction mechanism 22a, and the second drive motor 21b is in transmission connection with the second drive shaft 3b via the second reduction mechanism 22b. In other words, the first drive shaft 3a and the second drive shaft 3b are both equipped with corresponding reduction mechanisms. The first reduction mechanism 22a can increase the torque transmitted to the first drive shaft 3a by the first drive motor 21a, and the second reduction mechanism 22b can increase the torque transmitted to the second drive shaft 3b by the second drive motor 21b, thereby meeting the high torque requirements of the vehicle in scenarios such as starting and climbing. In addition, the first electric drive unit 2a can drive the first drive shaft 3a to rotate in a first direction, and the second electric drive unit 2b can drive the second drive shaft 3b to rotate in a second direction. The first direction is opposite to the second direction, that is, the first drive shaft 3a and the second drive shaft 3b can be rotated in opposite directions, so that the vehicle can turn around on the spot, thereby increasing the functionality of the drive system 100.

[0094] In some embodiments, the first drive motor 21a and the differential 4 are both transmission-connected to the first drive shaft 3a via a first reduction gear mechanism 22a, and the second drive motor 21b and the differential 4 are both transmission-connected to the second drive shaft 3b via a second reduction gear mechanism 22b. This allows for power coupling between the engine 1 and the first drive motor 21a at the first drive shaft 3a, and power coupling between the engine 1 and the second drive motor 21b at the second drive shaft 3b, thereby improving the driving performance of the drive system 100. Furthermore, the differential 4 and the first drive motor 21a share the first reduction gear mechanism 22a, while the differential 4 and the second drive motor 21b share the second reduction gear mechanism 22b. This effectively reduces the number of reduction gear mechanisms, thereby reducing the number of gears in the first transmission assembly, thereby reducing the cost of the drive system 100 and reducing the space occupied by the drive system 100, thereby facilitating the layout of the drive system 100.

[0095] Specifically, the first intermediate gear 221a meshes with the first output gear 43 and the first input gear 222a, and the second intermediate gear 221b meshes with the second output gear 44 and the second input gear 222b. The power outputted by the first drive motor 21a and the first output shaft 41 is transmitted to the first drive shaft 3a via the first intermediate gear 221a and the first input gear 222a, thereby achieving power coupling between the first drive motor 21a and the engine 1 at the first intermediate gear 221a. The power outputted by the second drive motor 21b and the second output shaft 42 is transmitted to the second drive shaft 3b via the second intermediate gear 221b and the second input gear 222b, thereby achieving power coupling between the second drive motor 21b and the engine 1 at the second intermediate gear 221b. This effectively reduces the number of gears in the first reduction mechanism 22a and the second reduction mechanism 22b, thereby reducing the number of gears in the first drive assembly and facilitating the layout of the first drive assembly.

[0096] According to some embodiments of the present invention, the first reduction mechanism 22a and the second reduction mechanism 22b are located between the first drive motor 21a and the second drive motor 21b. This effectively reduces the span between the first reduction mechanism 22a and the second reduction mechanism 22b in the left-right direction, thereby reducing the span between the portion of the first reduction mechanism 22a disposed on the first drive shaft 3a and the portion of the second reduction mechanism 22b disposed on the second drive shaft 3b. This reduces the swing angle of the first drive shaft 3a and the second drive shaft 3b, thereby extending the service life of the first drive shaft 3a and the second drive shaft 3b.

[0097] In addition, along the left and right directions, the first reduction mechanism 22a can be arranged between the differential 4 and the first drive motor 21a, and the second reduction mechanism 22b can be arranged between the differential 4 and the second drive motor 21b, that is, the differential 4 is arranged between the first reduction mechanism 22a and the second reduction mechanism 22b, which facilitates the transmission connection between the output shaft of the first drive motor 21a and the first output gear 43 and the first reduction mechanism 22a, and at the same time facilitates the transmission connection between the output shaft of the second drive motor 21b and the second output gear 44 and the second reduction mechanism 22b, and the layout is reasonable.

[0098] According to some embodiments of the present invention, the first reduction mechanism 22a includes a first intermediate gear 221a, a first input gear 222a and a third intermediate gear 224a, the first intermediate gear 221a and the third intermediate gear 224a are coaxially arranged and fixedly connected, the first intermediate gear 221a is meshed with the first input gear 222a, the first input gear 222a is arranged on the first drive shaft 3a, and the output shaft of the first drive motor 21a is transmission-connected to the third intermediate gear 224a; the second reduction mechanism 22b includes a second intermediate gear 22 1b, the second input gear 222b and the fourth intermediate gear 224b, the second intermediate gear 221b and the fourth intermediate gear 224b are coaxially arranged and fixedly connected, the output shaft of the second drive motor 21b is transmission-connected to the fourth intermediate gear 224b, the second intermediate gear 221b is meshed with the second input gear 222b, and the second input gear 222b is arranged on the second drive shaft 3b; wherein, the third intermediate gear 224a and the fourth intermediate gear 224b are located between the first intermediate gear 221a and the second intermediate gear 221b.

[0099] Thus, the distance between the third intermediate gear 224a and the fourth intermediate gear 224b can be shortened, thereby shortening the distance between the first driving motor 21a and the second driving motor 21b, thereby reducing the space occupied in the left-right direction.

[0100] Specifically, the first reduction mechanism 22a includes a first drive gear 223a, the second reduction mechanism 22b includes a second drive gear 223b, the first drive gear 223a is engaged with the third intermediate gear 224a, the second drive gear 223b is engaged with the fourth intermediate gear 224b, the first input gear 222a is connected to the second input gear 222b through the first synchronization lock 9a, the first input gear 222a and the first synchronization lock 9a define a first arrangement space located on the outer peripheral side of the first synchronization lock 9a, the second input gear 222b and the first synchronization lock 9a define a second arrangement space located on the outer peripheral side of the first synchronization lock 9a, part of the third intermediate gear 224a is arranged in the first arrangement space, and part of the fourth intermediate gear 224b is arranged in the second arrangement space. That is, the third intermediate gear 224a and the first synchronous lock 9a are arranged radially along the first drive shaft 3a, and the fourth intermediate gear 224b and the first synchronous lock 9a are arranged radially along the second drive shaft 3b, so that the third intermediate gear 224a and the fourth intermediate gear 224b can make full use of the space located on the outer peripheral side of the first synchronous lock 9a and between the first input gear 222a and the second input gear 222b for arrangement. While controlling the distance between the first input gear 222a and the second output gear 44, the arrangement space occupied by the first reduction mechanism 22a and the second reduction mechanism 22b in the left and right directions is reduced, and the structure is compact.

[0101] In a specific example, the diameter of the first input gear 222a is larger than the diameter of the first intermediate gear 221a, and the diameter of the third intermediate gear 224a is larger than the diameters of the first intermediate gear 221a and the first drive gear 223a; the diameter of the second input gear 222b is larger than the diameter of the second intermediate gear 221b, and the diameter of the fourth intermediate gear 224b is larger than the diameters of the second intermediate gear 221b and the second drive gear 223b, so that two-stage reduction can be achieved through the first reduction mechanism 22a and the second reduction mechanism 22b to increase the torque delivered to the first drive shaft 3a and the second drive shaft 3b.

[0102] According to some embodiments of the present invention, the first drive motor 21a and the second drive motor 21b are located on the left and right sides of the differential 4, and the differential 4 is located below the output shaft of the first drive motor 21a and the output shaft of the second drive motor 21b. As a result, the differential 4 can fully utilize the space below the output shaft of the first drive motor 21a and the output shaft of the second drive motor 21b, thereby reducing the layout space occupied by the differential 4, the first drive motor 21a, and the second drive motor 21b in the front-to-back direction and the left-to-right direction. In addition, along the front-to-back direction, the first output shaft 41 and the output shaft of the first drive motor 21a are approximately the same distance from the first drive shaft 3a, and the second output shaft 42 and the output shaft of the second drive motor 21b are approximately the same distance from the second drive shaft 3b. This can shorten the path length of power delivery to the first drive shaft 3a and the second drive shaft 3b, making the power output of the first drive assembly more efficient.

[0103] According to some embodiments of the present invention, the first reduction mechanism 22a includes a first drive gear 223a, which is disposed on the output shaft of the first drive motor 21a; the second reduction mechanism 22b includes a second drive gear 223b, which is disposed on the output shaft of the second drive motor 21b; and the first drive gear 223a and the second drive gear 223b are at least partially located directly above the differential 4. Thus, the space above the differential 4 can be fully utilized to arrange the first drive gear 223a and the second drive gear 223b, thereby shortening the distance between the first drive gear 223a and the second drive gear 223b in the left-right direction, thereby reducing the left-right span between the first drive motor 21a and the second drive motor 21b, that is, reducing the distance between the two opposing side surfaces of the second drive motor 21b, thereby reducing the difficulty of arranging the drive system 100.

[0104] According to some embodiments of the present invention, the first transmission assembly further includes a reduction gear set 5, and the first drive assembly further includes a generator 6. The output shaft of the engine 1 is adapted to be drivingly connected to the input shaft of the generator 6, and the output shaft of the generator 6 is adapted to be drivingly connected to the differential 4 via the reduction gear set 5. A first clutch 7a is provided between the generator 6 and the reduction gear set 5. Thus, by controlling the engagement or disengagement state of the first clutch 7a, and controlling the operation or shutdown of the engine 1, the generator 6, the first drive motor 21a, and the second drive motor 21b, different power output modes of the drive system 100 can be switched to meet the power requirements of the vehicle in different scenarios.

[0105] According to some embodiments of the present invention, the drive system 100 has at least a first mode, a second mode, a third mode, and a fourth mode. In the first mode, the first clutch 7a is disengaged, the first drive motor 21a and the second drive motor 21b are started, and the engine 1 and the generator 6 are stopped. In other words, in the first mode, the engine 1 and the generator 6 are disconnected from the differential 4. Power is then transmitted to the first drive shaft 3a via the first drive motor 21a, and to the second drive shaft 3b via the second drive motor 21b.

[0106] In the second mode, the first clutch 7a is disengaged, and the first and second drive motors 21a, 21b, engine 1, and generator 6 are all started. That is, in the second mode, the engine 1 and generator 6 are disconnected from the differential 4. Power is delivered to the first drive shaft 3a via the first drive motor 21a, and to the second drive shaft 3b via the second drive motor 21b. However, the engine 1 is started to drive the generator 6 to generate electricity and charge the power battery 10.

[0107] In the third mode, the first clutch 7a is engaged, and the first drive motor 21a, the second drive motor 21b, the engine 1, and the generator 6 are all started. That is, in the third mode, the first drive motor 21a delivers power to the first drive shaft 3a, and the second drive motor 21b delivers power to the second drive shaft 3b. Furthermore, the engine 1 is drivingly connected to the differential 4 via the generator 6, allowing the engine 1 to deliver power to the first drive shaft 3a and the second drive shaft 3b, respectively, through the differential 4. In other words, at this point, the engine 1, the first drive motor 21a, and the second drive motor 21b simultaneously contribute to driving the vehicle.

[0108] In the fourth mode, the first clutch 7a is engaged, the engine 1 is started, and the first and second drive motors 21a, 21b, and the generator 6 are stopped. In other words, in the fourth mode, the engine 1 is drivingly connected to the differential 4 via the first clutch 7a, and power is transmitted to the first and second drive shafts 3a, 3b solely through the engine 1. Neither the first nor the second drive motor 21a, 21b participates in driving.

[0109] According to some embodiments of the present invention, the first drive motor 21a and the second drive motor 21b are located on the left and right sides of the generator 6. This allows the first drive motor 21a and the second drive motor 21b to be symmetrically distributed on the left and right sides of the generator 6, resulting in a more regular structure and preventing imbalanced weight from affecting the stability of the drive system 100. In one specific example, the generator 6 is located above the output shafts of the first drive motor 21a and the second drive motor 21b, which reduces the space occupied by the first drive assembly in the left-right direction and facilitates the layout of the drive system 100.

[0110] According to some embodiments of the present invention, Figures 8-10 As shown, the drive system 100 also includes an outer shell 8, and the first drive motor 21a, the second drive motor 21b, the first reduction mechanism 22a, the second reduction mechanism 22b, the differential 4, the generator 6 and the reduction gear set 5 are all arranged in the outer shell 8. An input socket 81 and two output sockets 82 are formed on the outer shell 8. The output shaft of the engine 1 is passed through the input socket 81 to be transmission-connected to the input shaft of the generator 6, the first drive shaft 3a is passed through one of the output sockets 82 to be transmission-connected to the first reduction mechanism 22a, and the second drive shaft 3b is passed through the other output socket 82 to be transmission-connected to the second reduction mechanism 22b. Thus, by arranging the first drive motor 21a, the second drive motor 21b, the first reduction mechanism 22a, the second reduction mechanism 22b, the differential 4, the generator 6, and the reduction gear set 5 within the outer housing 8, the overall arrangement and installation of the first drive motor 21a, the second drive motor 21b, the first reduction mechanism 22a, the second reduction mechanism 22b, the differential 4, the generator 6, and the reduction gear set 5 are facilitated, thereby improving the installation efficiency of the drive system 100. In a specific example, the first synchronization lock 9a is located between the first input gear 222a and the second input gear 222b and within the outer housing 8.

[0111] In some embodiments, the height dimension of the outer shell 8 (eg Figure 9 The H1 shown in FIG is in the range of 650 mm to 700 mm, and the length of the outer shell 8 (as shown in FIG Figure 9 The L1 shown in FIG is 600 mm to 700 mm, and the width of the outer shell 8 (as shown in FIG Figure 10 The W1) shown in FIG is in the range of 600 mm to 680 mm. This can prevent the height, length, and width of the outer shell 8 from being too large and occupying too much installation space, and can also prevent the height, length, and width of the outer shell 8 from being too small and affecting the arrangement of components inside the outer shell 8. Thus, the installation space occupied by the outer shell 8 can be controlled while facilitating the arrangement of components inside the outer shell 8. Among them, the height dimension of the outer shell 8 can be 650mm, 660mm, 670mm, 680mm, 690mm, 700mm and the like, the length dimension of the outer shell 8 can be 600mm, 610mm, 620mm, 630mm, 640mm, 650mm, 660mm, 670mm, 680mm, 690mm, 700mm and the like, and the width dimension of the outer shell 8 can be 600mm, 610mm, 620mm, 630mm, 640mm, 650mm, 660mm, 670mm, 680mm and the like, and no specific restrictions are made here.

[0112] In some embodiments, the vertical distance between the center of the output socket and the bottom surface of the housing in the vertical direction (eg Figure 9 The range of H2 shown in FIG is 460 to 500 mm. This prevents an excessively large distance H2 from increasing the vertical space occupied, while also preventing an excessively small distance H2 from increasing the difficulty of arranging the generator 6, differential 4, and first drive assembly. The vertical distance between the center of the output socket and the bottom surface of the housing in the vertical direction can be 460 mm, 470 mm, 480 mm, 490 mm, 500 mm, and so on.

[0113] In some embodiments, the first synchronization lock 9a is located at the rear side of the differential 4, and along the front-to-back direction, the vertical distance between the first output socket and the second output socket and the front side of the outer shell 8 (such as Figure 9 The range of L2 shown in FIG is 480 mm to 550 mm. This prevents an excessively large distance L2 from increasing the space occupied in the front-to-back direction, while also preventing an excessively small distance L2 from increasing the difficulty of arranging the differential 4 and the first drive assembly. The vertical distances between the first and second output sockets and the front side of the outer shell 8 can be 480 mm, 490 mm, 500 mm, 510 mm, 520 mm, 530 mm, 540 mm, 550 mm, and so on.

[0114] According to some embodiments of the present invention, the drive system 100 further includes a power battery 10, to which the first drive motor 21a and the second drive motor 21b are both electrically connected. In other words, the power battery 10 can power the first drive motor 21a and the second drive motor 21b to ensure normal operation of the first drive motor 21a and the second drive motor 21b. This reduces the number of power batteries 10, thereby simplifying the layout of the drive system 100.

[0115] According to some embodiments of the present invention, the power battery 10 is located on the side of the first drive shaft 3a and the second drive shaft 3b facing away from the first drive assembly in the front-to-back direction. This prevents interference between the power battery 10 and the first drive assembly, resulting in a reasonable layout and low deployment difficulty.

[0116] According to some embodiments of the present invention, the engine 1 is arranged longitudinally, the first drive motor 21a is arranged transversely, and the second drive motor 21b is arranged transversely. That is, the rotation axis of the output shaft of the engine 1 extends in the front-to-back direction, and the rotation axis of the output shafts of the first drive motor 21a and the second drive motor 21b extend in the left-to-right direction. Among them, by placing the engine 1 longitudinally, the balance of the front and rear weights of the vehicle can be ensured, thereby improving the handling of the vehicle. By placing the first drive motor 21a and the second drive motor 21b transversely, the rotation axis of the output shafts of the first drive motor 21a and the second drive motor 21b can be consistent with the rotation axis of the first drive shaft 3a and the second drive shaft 3b, thereby simplifying the transmission mechanism for the first drive motor 21a to transmit power to the first drive shaft 3a and the transmission mechanism for the second drive motor 21b to transmit power to the second drive shaft 3b, that is, the complexity of the first reduction mechanism 22a and the second reduction mechanism 22b can be simplified, which helps to reduce the cost of the drive system 100.

[0117] According to some embodiments of the present invention, the drive system 100 further includes: a second drive assembly, a third drive shaft 3c, a fourth drive shaft 3d and a second transmission assembly, the second drive assembly and the first drive assembly are arranged at intervals in the front-to-rear direction, the second drive assembly includes a third drive motor 21c and a fourth drive motor 21d, the third drive shaft 3c and the fourth drive shaft 3d are arranged in the left-right direction and both extend in the left-right direction, the third drive shaft 3c and the fourth drive shaft 3d are used to be connected to the wheel 20, the second transmission assembly includes a third reduction mechanism 22c and a fourth reduction mechanism 22d, the third drive motor 21c is connected to the third drive shaft 3c through the third reduction mechanism 22c, and the fourth drive motor 21d is connected to the fourth drive shaft 3d through the fourth reduction mechanism 22d.

[0118] That is, the third drive motor 21c can transmit power to the third drive shaft 3c via the third reduction gear mechanism 22c, and the fourth drive motor 21d can transmit power to the fourth drive shaft 3d via the fourth reduction gear mechanism 22d. The first drive shaft 3a, second drive shaft 3b, third drive shaft 3c, and fourth drive shaft 3d are respectively connected to the vehicle's four tires. In other words, each of the vehicle's four tires has a corresponding electric drive source, providing the vehicle with a four-wheel drive mode and improving driving safety.

[0119] In one embodiment, the first drive shaft 3a and the second drive shaft 3b are located in front of the third drive shaft 3c and the fourth drive shaft 3d. The first drive shaft 3a and the second drive shaft 3b are respectively connected to the left and right wheels 20 at the front of the vehicle, and the third drive shaft 3c and the fourth drive shaft 3d are respectively connected to the left and right wheels 20 at the rear of the vehicle. In addition, the third drive shaft 3c and the fourth drive shaft 3d are coaxially arranged.

[0120] According to some embodiments of the present invention, the drive system 100 further includes a second synchronization lock 9b, and the third drive shaft 3c is connected to the third drive shaft 3c via the second synchronization lock 9b. The second synchronization lock 9b has a locked state and an unlocked state. In the locked state, the third drive shaft 3c and the fourth drive shaft 3d are relatively fixed. In the unlocked state, the third drive shaft 3c and the fourth drive shaft 3d can move independently of each other. Therefore, by controlling the second synchronization lock 9b to switch to the locked state, the third drive shaft 3c and the fourth drive shaft 3d are connected and rotated synchronously, and the power coupling of the third drive motor 21c and the fourth drive motor 21d on the drive shaft can be achieved, so that the vehicle can escape from difficulties in off-road driving environments. At the same time, by controlling the second synchronization lock 9b to switch to the unlocked state, the third drive shaft 3c and the fourth drive shaft 3d can rotate independently, thereby achieving differential rotation of the third drive shaft 3c and the fourth drive shaft 3d, and the third drive shaft 3c and the fourth drive shaft 3d can rotate in opposite directions, thereby achieving functions such as turning around in place.

[0121] In some embodiments, the third reduction mechanism 22c includes a third input gear disposed on the third output shaft, and the fourth reduction mechanism 22d includes a fourth input gear disposed on the fourth output shaft, wherein the third input gear is connected to the fourth input gear via a second synchronization lock 9b. In other words, the second synchronization lock 9b controls the connection or disconnection between the third input gear and the fourth output gear, thereby controlling the connection or disconnection between the third drive shaft 3c and the fourth drive shaft 3d. Thus, by disposing the second synchronization lock 9b between the third input gear and the fourth input gear, the distance between the third input gear and the fourth input gear can be effectively reduced, that is, the span between the third input gear and the fourth input gear in the left-right direction can be reduced, thereby reducing the swing angle of the third drive shaft 3c and the fourth drive shaft 3d when the wheels bounce up and down, thereby extending the service life of the third drive shaft 3c and the fourth drive shaft 3d.

[0122] According to some embodiments of the present invention, the drive system 100 further includes a power battery 10, which is located between a first drive assembly and a second drive assembly. The first drive assembly includes an engine 1, a first drive motor 21a, and a second drive motor 21b. The engine 1 is drivingly connected to the differential 4, the first drive motor 21a is drivingly connected to the first drive shaft 3a, and the second drive motor 21b is drivingly connected to the second drive shaft 3b. The first drive motor 21a, the second drive motor 21b, the third drive motor 21c, and the fourth drive motor 21d are all electrically connected to the power battery 10. The power battery 10 can supply power to the first drive motor 21a, the second drive motor 21b, the third drive motor 21c, and the fourth drive motor 21d. By arranging the power battery 10 between the first drive assembly and the second drive assembly, the length of the wiring harness electrically connecting the power battery 10 and the first drive motor 21a, the second drive motor 21b, the third drive motor 21c, and the fourth drive motor 21d can be shortened, and the cross-arrangement of the connecting wiring harnesses can be reduced, thereby reducing the cost of the drive system 100 and improving safety.

[0123] In a specific example, a vehicle Figure 1 Take the two-wheel drive model shown in as an example. Figure 11 As shown, after the vehicle is started, the scene mode is first selected. If the escape mode is selected, the first synchronization lock 9a is controlled to switch to the locked state, so that the wheels 20 on the left and right sides rotate synchronously; if it is not the escape mode, it is necessary to further confirm whether it belongs to the on-the-spot U-turn mode. If it is the on-the-spot U-turn mode, the vehicle can only select the first mode, the second mode or the third mode; if it is not the on-the-spot U-turn mode, the vehicle can select the first mode, the second mode, the third mode or the fourth mode.

[0124] Specifically, after entering the first mode, the first clutch 7a is disconnected, the engine 1 and the generator 6 both stop working, the first drive motor 21a and the second drive motor 21b start working, and the vehicle is driven by the first drive motor 21a and the second drive motor 21b; when entering the second mode, the first clutch 7a is disconnected, the generator 6 starts first to drive the engine 1 to start working, and then the engine 1 drives the generator 6 to generate electricity, the first drive motor 21a and the second drive motor 21b start working, and the vehicle is driven by the first drive motor 21a and the second drive motor 21b; when entering the third mode, the first clutch 7a is engaged In the fourth mode, the generator 6 starts first to drive the engine 1 to start working, and then the engine 1 drags the generator 6 to generate electricity (the generator 6 can also be not working at this time and only reversely dragged), the first drive motor 21a and the second drive motor 21b start working, and the vehicle is driven by the first drive motor 21a, the second drive motor 21b and the engine 1; when entering the fourth mode, the generator 6 starts first to drive the engine 1 to start working, and then the generator 6 stops, the generator 6 is reversely dragged by the engine 1, the first drive motor 21a and the second drive motor 21b are in a stopped state, the first clutch 7a is engaged, and the vehicle is driven by the engine 1.

[0125] A vehicle according to a second embodiment of the present invention will be described below with reference to the accompanying drawings.

[0126] A vehicle according to an embodiment of the second aspect of the present invention includes: a drive system 100 .

[0127] According to the vehicle of the second aspect of the embodiment of the present invention, by arranging the differential 4 and the first drive shaft 3a in the front-to-rear direction, the span in the left-right direction between the reduction mechanism arranged on the first drive shaft 3a and the reduction mechanism arranged on the second drive shaft 3b can be reduced, and the pitch of the ball cages on the first drive shaft 3a and the second drive shaft 3b can be increased, so that when the wheel 20 bounces, the swing angle of the first drive shaft 3a and the second drive shaft 3b can be reduced, and the damage to the first drive shaft 3a and the second drive shaft 3b during the bouncing of the wheel 20 can be reduced, which is conducive to extending the service life of the first drive shaft 3a and the second drive shaft 3b.

[0128] In the present invention, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; they may refer to direct connection or indirect connection through an intermediate medium; they may refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0129] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0130] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A drive system, characterized in that: include: a first drive assembly; a first drive shaft and a second drive shaft, the first drive shaft and the second drive shaft being arranged in the left-right direction and extending in the left-right direction, the first drive shaft and the second drive shaft being used to connect to wheels; A first transmission assembly, wherein the first drive assembly is connected to the first drive shaft and the second drive shaft through the first transmission assembly, and the first transmission assembly includes a differential, and the differential and the first drive shaft are arranged in a front-to-rear direction.

2. The drive system according to claim 1, characterized in that The first transmission assembly includes a first reduction mechanism and a second reduction mechanism. The differential is connected to the first drive shaft through the first reduction mechanism, and the differential is connected to the second drive shaft through the second reduction mechanism.

3. The drive system according to claim 2, characterized in that: The first reduction mechanism includes a first input gear provided on the first drive shaft, and the second reduction mechanism includes a second input gear provided on the second drive shaft. The distance between the end face of the first input gear facing away from the second input gear and the end face of the second input gear facing away from the first input gear is in the range of 280 mm to 400 mm.

4. The drive system according to claim 2, characterized in that: The first reduction mechanism and the second reduction mechanism are located on the left and right sides of the differential.

5. The drive system according to claim 2, characterized in that: The differential includes a first output shaft and a second output shaft. The first output shaft is provided with a first output gear, and the second output shaft is provided with a second output gear. The first output gear is transmission-connected to the first reduction mechanism, and the second output gear is transmission-connected to the second reduction mechanism.

6. The drive system according to claim 5, characterized in that: The first reduction mechanism includes a first intermediate gear and a first input gear, the first intermediate gear meshing with the first output gear and the first input gear, and the first input gear is provided on the first drive shaft; The second reduction mechanism includes a second intermediate gear and a second input gear. The second intermediate gear is engaged with the second output gear and the second input gear. The second input gear is provided on the second drive shaft.

7. The drive system according to claim 6, characterized in that: The first output gear, the first intermediate gear and the first input gear are arranged in sequence from front to back, and the second output gear, the second intermediate gear and the second input gear are arranged in sequence from front to back.

8. The drive system according to claim 2, characterized in that: It also includes a first synchronization lock, through which the first drive shaft is connected to the second drive shaft, and the first synchronization lock has a locked state and an unlocked state. In the locked state, the first drive shaft and the second drive shaft are relatively fixed, and in the unlocked state, the first drive shaft and the second drive shaft can move relatively independently.

9. The drive system according to claim 8, characterized in that: The first reduction mechanism includes a first input gear provided on the first drive shaft, the second reduction mechanism includes a second input gear provided on the second drive shaft, and the first synchronization lock is connected between the first input gear and the second input gear.

10. The drive system according to claim 1, wherein: The first drive assembly includes an engine, and the engine is drivingly connected to the differential.

11. The drive system according to claim 10, characterized in that: The first transmission assembly includes a reduction gear set, and the output shaft of the engine is suitable for being connected to the differential through the reduction gear set.

12. The drive system according to claim 11, characterized in that The reduction gear set includes a plurality of transmission gears and a third output gear. The output shaft of the engine is suitable for being connected to the third output gear through the plurality of transmission gears. The transmission gears are spur gears, and the third output gear is a helical gear. The reduction gear set is connected to the differential through the third output gear.

13. The driving system according to claim 11, characterized in that The first drive assembly further includes a generator, the output shaft of the engine is adapted to be drivingly connected to the input shaft of the generator, and the output shaft of the engine is adapted to be drivingly connected to the differential through the reduction gear set.

14. The drive system according to claim 13, wherein: The generator is located above the differential. Along the front-rear direction, the reduction gear set is located on a side of the differential and the generator that is away from the first drive shaft.

15. The drive system according to claim 13, wherein: A first clutch is provided between the generator and the reduction gear set.

16. The drive system according to claim 13, wherein: A second clutch is provided between the engine and the generator.

17. The drive system according to claim 10, characterized in that The first drive assembly also includes a first drive motor and a second drive motor, and the first transmission assembly also includes a first reduction mechanism and a second reduction mechanism. The first drive motor is connected to the first drive shaft through the first reduction mechanism, and the second drive motor is connected to the second drive shaft through the second reduction mechanism.

18. The drive system according to claim 17, wherein: The first speed reduction mechanism and the second speed reduction mechanism are located between the first drive motor and the second drive motor.

19. The drive system according to claim 18, wherein: The first reduction mechanism includes a first intermediate gear, a first input gear, and a third intermediate gear. The first intermediate gear and the third intermediate gear are coaxially arranged and fixedly connected. The first intermediate gear is meshed with the first input gear. The first input gear is provided on the first drive shaft. The output shaft of the first drive motor is in driving connection with the third intermediate gear. The second reduction mechanism includes a second intermediate gear, a second input gear, and a fourth intermediate gear. The second intermediate gear is coaxially arranged with the fourth intermediate gear and fixedly connected. The output shaft of the second drive motor is in transmission connection with the fourth intermediate gear. The second intermediate gear is meshed with the second input gear. The second input gear is provided on the second drive shaft. The third intermediate gear and the fourth intermediate gear are located between the first intermediate gear and the second intermediate gear.

20. The drive system according to claim 17, wherein: The first drive motor and the second drive motor are located on the left and right sides of the differential, and the differential is located below the output shafts of the first drive motor and the second drive motor.

21. The drive system according to claim 19, wherein: The first reduction mechanism includes a first drive gear, which is arranged on the output shaft of the first drive motor. The second reduction mechanism includes a second drive gear, which is arranged on the output shaft of the second drive motor. At least parts of the first drive gear and the second drive gear are located directly above the differential.

22. The drive system according to claim 17, wherein: The first transmission assembly also includes a reduction gear set, and the first drive assembly also includes a generator. The output shaft of the engine is suitable for being connected to the input shaft of the generator, and the output shaft of the generator is suitable for being connected to the differential through the reduction gear set. A first clutch is provided between the generator and the reduction gear set.

23. The drive system according to claim 22, characterized in that The first drive motor and the second drive motor are located on the left and right sides of the generator.

24. The drive system according to claim 22, wherein: It also includes an outer shell, and the first drive motor, the second drive motor, the first reduction mechanism, the second reduction mechanism, the differential, the generator and the reduction gear set are all arranged in the outer shell. An input socket and two output sockets are formed on the outer shell, the output shaft of the engine is passed through the input socket to be transmission-connected to the input shaft of the generator, the first drive shaft is passed through one of the output sockets to be transmission-connected to the first reduction mechanism, and the second drive shaft is passed through the other output socket to be transmission-connected to the second reduction mechanism.

25. The drive system according to claim 22, wherein: The drive system has at least a first mode, a second mode, a third mode and a fourth mode; wherein, In the first mode, the first clutch is disengaged, the first drive motor and the second drive motor are started, and the engine and the generator are stopped; In the second mode, the first clutch is disengaged, and the first drive motor, the second drive motor, the engine, and the generator are all started; In the third mode, the first clutch is engaged, and the first drive motor, the second drive motor, the engine, and the generator are all started; In the fourth mode, the first clutch is engaged, the engine is started, and the first drive motor, the second drive motor, and the generator are stopped.

26. The drive system according to claim 17, wherein: It also includes a power battery, and the first drive motor and the second drive motor are both electrically connected to the power battery.

27. The drive system according to claim 26, wherein: In the front-to-back direction, the power battery is located on a side of the first drive shaft and the second drive shaft that is away from the first drive assembly.

28. The drive system according to claim 17, wherein: The engine is arranged in a longitudinal direction, the first drive motor is arranged in a transverse direction, and the second drive motor is arranged in a transverse direction.

29. The drive system according to any one of claims 1 to 9, characterized in that: Also includes: a second drive assembly, the second drive assembly and the first drive assembly being spaced apart in a front-to-rear direction, the second drive assembly comprising a third drive motor and a fourth drive motor; a third drive shaft and a fourth drive shaft, the third drive shaft and the fourth drive shaft being arranged in the left-right direction and extending in the left-right direction, the third drive shaft and the fourth drive shaft being used to connect to wheels; The second transmission assembly includes a third reduction mechanism and a fourth reduction mechanism. The third drive motor is connected to the third drive shaft through the third reduction mechanism, and the fourth drive motor is connected to the fourth drive shaft through the fourth reduction mechanism.

30. The drive system according to claim 29, wherein: It also includes a second synchronization lock, and the third drive shaft is connected to the third drive shaft through the second synchronization lock. The second synchronization lock has a locked state and an unlocked state. In the locked state, the third drive shaft and the fourth drive shaft are relatively fixed. In the unlocked state, the third drive shaft and the fourth drive shaft can move relatively independently.

31. The drive system according to claim 29, wherein: It also includes a power battery, which is located between the first drive assembly and the second drive assembly. The first drive assembly includes an engine, a first drive motor and a second drive motor. The engine is connected to the differential in a transmission manner. The first drive motor is connected to the first drive shaft in a transmission manner. The second drive motor is connected to the second drive shaft in a transmission manner. The first drive motor, the second drive motor, the third drive motor and the fourth drive motor are all electrically connected to the power battery.

32. A vehicle, characterized in that: include: A drive system according to any one of claims 1 to 31.

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