Dual-motor driving system

Abstract

The utility model discloses a dual-motor driving system which comprises a first motor and a second motor which are vertically arranged, the first motor and the second motor are close to each other, motor shafts of the first motor and the second motor are arranged in a back-to-back mode, and the motor shaft of the first motor is in transmission connection with a first output shaft through a first transmission assembly. A motor shaft of the second motor is in transmission connection with a second output shaft through a second transmission assembly, the first output shaft and the second output shaft are coaxial, and the distance between the first output shaft and the motor shaft of the first motor is equal to the distance between the second output shaft and the motor shaft of the second motor. The utility model has the advantages that: the layout is reasonable, the radial arrangement of the first motor and the second motor can greatly reduce the axial size, reduce the occupied arrangement space of the chassis structure, and can give consideration to the dynamic property and economical efficiency of the whole vehicle to the greatest extent. According to the design, the requirement for the space of the whole vehicle is low, and wide applicability is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of gearboxes, and in particular to a dual-motor drive system. Background Art

[0002] The rapid development of the automobile industry and the increasing demand for automobiles have led to a continuous increase in automobile production and ownership, which has aggravated the energy and environmental issues that people are currently concerned about. Pure electric vehicles have the characteristics of low noise, no pollution, diversified energy sources, and high energy efficiency, and are an important way to solve automobile problems in urbanization.

[0003] For example, Chinese Patent No. 213007565U discloses an integrated dual-motor coupling drive device and an electric vehicle, including a housing, wherein a transmission assembly arranged in a symmetrical structure is arranged in the housing, wherein the output end of each transmission assembly is connected to the respective corresponding wheel axle through a coupling member I, and the input end thereof is connected to the respective corresponding motor through a coupling member II, wherein the motor is located between adjacent wheel axles, and the central axis of the motor shaft of the motor is coaxial with the central axis of the wheel axle. However, the axial dimension (the distance between the first wheel and the second wheel) of such an electric drive axle is particularly long, which will occupy the space for the chassis structure layout, affect the number of battery layouts and the transmission efficiency, resulting in a short vehicle range, and it is difficult to take into account the power and economy of the whole vehicle. In addition, the gearbox speed ratio of the system is small, the cost is high, and the radial dimension is too large, which leads to a reduction in ground clearance and an increase in the swing angle of the half-axle, and the transmission efficiency to the wheel end is reduced accordingly. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a dual-motor drive system.

[0005] The purpose of the utility model is achieved through the following technical solutions:

[0006] A dual-motor drive system includes a first motor and a second motor disposed in an upper and lower manner, wherein the first motor and the second motor are close to each other and their motor shafts are disposed opposite to each other, the motor shaft of the first motor is transmission-connected to a first output shaft through a first transmission assembly, the motor shaft of the second motor is transmission-connected to a second output shaft through a second transmission assembly, the first output shaft is coaxial with the second output shaft, and the distance between the first output shaft and the motor shaft of the first motor is equal to the distance between the second output shaft and the motor shaft of the second motor.

[0007] Preferably, the first transmission assembly includes a first sun gear fixedly mounted on the motor shaft of the first motor, a first gear ring is sleeved on the first sun gear, a first planetary gear meshed with the first sun gear is arranged between the first gear ring and the first sun gear, a planetary carrier is fixedly mounted on the first planetary gear, and the planetary carrier is fixedly mounted on the housing of the system; a second sun gear is fixedly mounted on the first gear ring, a second gear ring is sleeved on the second sun gear, the second gear ring is fixedly mounted on the housing of the system, a second planetary gear meshed with the second gear ring and the second sun gear is arranged between the second gear ring and the second sun gear, a second planetary carrier is fixedly mounted on the second planetary gear, and the first output shaft is fixedly mounted on the second planetary carrier;

[0008] The second transmission assembly includes a driving gear fixedly mounted on the motor shaft of the second motor, a connecting shaft coaxial with the second output shaft is provided on one side of the driving gear, a connecting gear is fixedly mounted on the connecting shaft, and a transmission gear meshing with each other is provided between the connecting gear and the driving gear; a third sun gear is also fixedly mounted on the other end of the connecting shaft, a third gear ring is sleeved on the third sun gear, and the third gear ring is fixedly mounted on the housing of the system; a third planetary gear meshing with the third sun gear is provided between the third gear ring and the third sun gear, a third planetary carrier is fixedly mounted on the third planetary gear, and the second output shaft is fixedly mounted on the third planetary carrier;

[0009] A sliding output gear is fixedly arranged on the first gear ring, an input gear is fixedly arranged on the motor shaft of the second motor, an idler shaft is arranged between the input gear and the sliding output gear, an idler wheel is loosely sleeved on the idler shaft, the idler wheel can move axially on the idler shaft, and the idler wheel is respectively meshed with the input gear and the sliding output gear.

[0010] Preferably, the first transmission assembly and the second transmission assembly both include a connecting shaft arranged between the motor shaft of the first motor and the first output shaft and between the motor shaft of the second motor and the second output shaft, one end of the connecting shaft is provided with a transmission gear, and the other end is provided with a linkage gear, the motor shafts of the first motor and the second motor are fixedly provided with a driving gear, and the driving gear is meshed with the transmission gear; the first output shaft and the second output shaft are fixedly provided with a connecting gear, and the linkage gear is meshed with the fixed connecting gear.

[0011] Preferably, an input gear is fixedly disposed on the motor shaft of the second motor, a sliding output gear meshing with the input gear is loosely sleeved on the connecting shaft, and a clutch that can be coupled with the sliding output gear is also fixedly disposed on the connecting shaft.

[0012] Preferably, an input gear is fixedly provided on the motor shaft of the second motor, a spline keypad is fixedly provided on the connecting shaft, and a sliding output gear is further provided on the connecting shaft, one side of the sliding output gear can be coupled with the spline keypad, and the sliding output gear is meshed with the input gear.

[0013] Preferably, an input gear is fixedly provided on the motor shaft of the first motor, a sliding output gear meshing with the input gear is loosely sleeved on the connecting shaft, and a clutch that can be coupled with the sliding output gear is also fixedly provided on the connecting shaft.

[0014] Preferably, an input gear is fixedly provided on the motor shaft of the first motor, a spline keypad is fixedly provided on the connecting shaft, and a sliding output gear is further provided on the connecting shaft, one side of the sliding output gear can be coupled with the spline keypad, and the sliding output gear is meshed with the input gear.

[0015] Preferably, the first transmission assembly and the second transmission assembly both include a first sun gear fixedly mounted on the first motor and the second motor, the first sun gear is sleeved with a first gear ring, a first planetary gear meshed with the first gear ring and the first sun gear is provided between the first gear ring and the first sun gear, a first planetary carrier is fixedly mounted on the first planetary gear, and the first planetary carrier is fixed to the housing of the system; a connecting shaft is fixedly mounted on the first gear ring, a connecting gear is fixedly mounted on the connecting shaft, a transmission gear is fixedly mounted on the first output shaft and the second output shaft, and the transmission gear is meshed with the connecting gear; a sliding output gear is fixedly mounted on the first gear ring, an input gear is fixedly mounted on the motor shaft of the second motor, an idler shaft is provided between the input gear and the sliding output gear, an idler shaft is hollowly sleeved with an idler, the idler can move axially on the idler shaft, and the idler is respectively meshed with the input gear and the sliding output gear.

[0016] Preferably, the first transmission assembly and the second transmission assembly both include a first sun gear fixedly mounted on the first motor and the second motor, the first sun gear being sleeved with a first ring gear, the first ring gear being fixed to a housing of the system, a first planetary gear being arranged between the first ring gear and the first sun gear, a first planetary carrier being fixedly mounted on the first planetary gear, a connecting shaft being fixedly mounted on the first planetary carrier, a connecting gear being fixedly mounted on the connecting shaft, a transmission gear being fixedly mounted on the first output shaft and the second output shaft, and the transmission gear being meshed with the connecting gear.

[0017] Preferably, the first motor and the second motor share a motor housing and are electrically connected to a battery.

[0018] The beneficial effects of the utility model are mainly reflected in:

[0019] 1. Reasonable layout. The radial arrangement of the first motor and the second motor can greatly reduce the axial size and the space occupied by the chassis structure, which can maximize the balance between the vehicle's power and economy. This design has relatively low space requirements for the vehicle and has a wide range of applicability;

[0020] 2. The first motor and the second motor are both located between the first transmission assembly and the second transmission assembly, which can avoid the problem of the first transmission assembly and the second transmission assembly being arranged in the same direction and causing the radial dimension to be too large, thereby reducing the space requirement for the whole vehicle;

[0021] 3. The first transmission assembly and the second transmission assembly in the system can match the first motor and the second motor with high speed at a large speed ratio to improve the transmission efficiency. In addition, the left-right symmetrical design can borrow a large number of parts, which significantly reduces the cost;

[0022] 4. The first motor and the second motor are closely arranged or share a motor housing, which can minimize the radial dimension and make it suitable for more vehicle models. ;

[0023] 5. When an electric vehicle is driving in a harsh working condition, the clutch or spline coupling can enhance the torque of the vehicle, thereby improving adhesion, allowing the vehicle to escape in time and ensuring safe driving of the vehicle. At the same time, this design can select a low-specification motor while meeting the same climbing power, thereby greatly reducing the weight and cost of the vehicle, enhancing the acceleration and off-road capabilities of the vehicle, and improving the vehicle's handling safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The technical solution of the utility model is further described below in conjunction with the accompanying drawings:

[0025] Figure 1 : A schematic structural diagram of the first preferred embodiment of the utility model;

[0026] Figure 2 : A schematic structural diagram of the second preferred embodiment of the utility model;

[0027] Figure 3 : A schematic structural diagram of the third preferred embodiment of the utility model;

[0028] Figure 4 : A schematic structural diagram of the fourth preferred embodiment of the utility model;

[0029] Figure 5 : A schematic structural diagram of the fifth preferred embodiment of the utility model;

[0030] Figure 6 : A schematic structural diagram of the sixth preferred embodiment of the utility model;

[0031] Figure 7 : A schematic diagram of the structure of the seventh preferred embodiment of the utility model. DETAILED DESCRIPTION

[0032] The present invention will be described in detail below in conjunction with the specific embodiments shown in the accompanying drawings. However, these embodiments are not limited to the present invention, and any structural, methodological, or functional changes made by a person skilled in the art based on these embodiments are all within the scope of protection of the present invention.

[0033] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0034] like Figures 1 to 7 As shown, the utility model discloses a dual-motor drive system, including a first motor 1 and a second motor 2 arranged in an upper and lower manner, and the first motor 1 and the second motor 2 are electrically connected to a battery. The first motor 1 and the second motor 2 are close to each other, and their motor shafts are arranged opposite to each other. That is, the first motor 1 and the second motor 2 are arranged radially, which can greatly reduce the axial size, reduce the space occupied by the chassis structure layout, and can take into account the power and economy of the whole vehicle to the greatest extent. In this preferred embodiment, the first motor 1 and the second motor 2 share a motor housing, thereby minimizing the radial size to the greatest extent, making it suitable for more vehicle models.

[0035] The motor shaft of the first motor 1 is connected to the first output shaft 3 through the first transmission assembly, and the motor shaft of the second motor 2 is connected to the second output shaft 4 through the second transmission assembly. The first motor 1 and the second motor 2 are both located between the first transmission assembly and the second transmission assembly, which can avoid the problem of excessive radial dimensions caused by the same-direction arrangement of the first transmission assembly and the second transmission assembly, and reduce the space requirements for the whole vehicle. The first output shaft 3 is coaxial with the second output shaft 4, and the distance between the first output shaft 3 and the motor shaft of the first motor 1 is equal to the distance between the second output shaft 4 and the motor shaft of the second motor 2. In addition, both the first output shaft 3 and the second output shaft 4 can be provided with parking ratchets, and the design of the parking ratchets is a prior art, and the present invention will not be elaborated on in detail here.

[0036] like Figure 1As shown, it is the first preferred embodiment of the utility model, the first transmission assembly includes a first sun gear 51 fixedly mounted on the motor shaft of the first motor 1, the first sun gear 51 is sleeved with a first gear ring 52, a first planetary gear 53 meshing with the first sun gear 51 is provided between the first gear ring 52 and the first sun gear 51, a planet carrier 54 is fixedly mounted on the first planetary gear 53, and the planet carrier 54 is fixedly mounted on the housing of the system; a second sun gear 58 is fixedly mounted on the first gear ring 52, a second gear ring 581 is sleeved on the second sun gear 58, the second gear ring 581 is fixedly mounted on the housing of the system, a second planetary gear 582 meshing with the second gear ring 581 is provided between the second gear ring 581 and the second sun gear 58, a second planetary gear 583 is fixedly mounted on the second planetary gear 582, and the first output shaft 3 is fixedly mounted on the second planetary carrier 583. The second transmission assembly includes a driving gear 59 fixedly mounted on the motor shaft of the second motor 2, a connecting shaft 55 coaxial with the second output shaft 4 is provided on one side of the driving gear 59, a connecting gear 56 is fixedly mounted on the connecting shaft 55, and a transmission gear 57 meshing with each other is provided between the connecting gear 56 and the driving gear 59; a third sun gear 50 is also fixedly mounted on the other end of the connecting shaft 55, a third gear ring 501 is sleeved on the third sun gear 50, and the third gear ring 501 is fixedly mounted on the housing of the system; a gear 57 meshing with the third sun gear 501 is provided between the third gear ring 501 and the third sun gear 50. The third planetary gear 502 is meshed with each other, and the third planetary carrier 503 is fixedly provided on the third planetary gear 502, and the second output shaft 4 is fixedly provided on the third planetary carrier 503; the first ring gear 52 is fixedly provided with a sliding output gear 521, and the motor shaft of the second motor 2 is fixedly provided with an input gear 21, and an idler shaft 522 is provided between the input gear 21 and the sliding output gear 521, and an idler wheel 523 is hollowly sleeved on the idler shaft 522, and the idler wheel 523 can move axially on the idler shaft 522, and the idler wheel 523 is respectively meshed with the input gear 21 and the sliding output gear 521.

[0037] The working process of the first preferred embodiment is briefly described below:

[0038] The first motor 1 and the second motor 2 are started, and the first motor 1 sequentially transmits power to the first output shaft 3 through the first sun gear 51, the first planetary gear 53, the first ring gear 52, the second sun gear 58, the second planetary gear 582, and the second planetary carrier 583. The second motor 2 sequentially transmits power to the second output shaft 4 through the driving gear 59, the transmission gear 57, the connecting gear 56, the connecting shaft 55, the third sun gear 50, the third planetary gear 502, and the third planetary carrier 503.

[0039] When the car is driving in a bad working condition, such as one side of the tire is slipping, the second motor 2 transmits power to the sliding output gear 521 through the input gear 21 and the idler gear 523, and then the sliding output gear 521 transmits power to the first output shaft 3 through the first ring gear 52, the second sun gear 58, the second planetary gear 582, and the second planetary carrier 583; similarly, the first motor 1 transmits power to the input gear 21 through the first sun gear 51, the first planetary gear 53, the first ring gear 52, the sliding output gear 521, and the idler gear 523 in sequence, and then the second motor 2 transmits power to the second output shaft 4 through the driving gear 59, the transmission gear 57, the connecting gear 56, the connecting shaft 55, the third sun gear 50, the third planetary gear 502 and the third planetary carrier 503 in sequence, so as to increase torque and enhance the ability to escape from difficulties.

[0040] like Figure 2 As shown, it is the second preferred embodiment of the utility model, the first transmission assembly and the second transmission assembly both include a connecting shaft 55 arranged between the motor shaft of the first motor 1 and the first output shaft 3 and between the motor shaft of the second motor 2 and the second output shaft 4, one end of the connecting shaft 55 is provided with a transmission gear 57, and the other end is provided with a linkage gear 571, the motor shafts of the first motor 1 and the second motor are fixedly provided with a driving gear 59, and the driving gear 59 is meshed with the transmission gear 57; the first output shaft 3 and the second output shaft 4 are fixedly provided with a connecting gear 56, and the linkage gear 571 is meshed with the fixed connecting gear 56. The motor shaft of the second motor 2 is fixedly provided with an input gear 21, and a sliding output gear 521 meshing with the input gear 21 is hollowly sleeved on the connecting shaft 55, and a clutch 524 that can be coupled with the sliding output gear 521 is also fixedly provided on the connecting shaft 55.

[0041] The working process of the second preferred embodiment is briefly described below:

[0042] The first motor 1 and the second motor 2 are started, and the first motor transmits power to the first output shaft 3 through the driving gear 59, the transmission gear 57, the connecting shaft 55, the linkage gear 571 and the connecting gear 56 in sequence. At the same time, the second motor 2 transmits power to the second output shaft 4 through the driving gear 59, the transmission gear 57, the connecting shaft 55, the linkage gear 571 and the connecting gear 56 in sequence.

[0043] When the car is driving in a bad condition, such as one side of the tire is slipping, the clutch 524 is coupled with the sliding output gear 521. At this time, the second motor 2 transmits power to the first output shaft 3 through the input gear 21, the sliding output gear 521, the clutch 524, the connecting shaft 55, the linkage gear 571 and the connecting gear 56 in sequence; similarly, the first motor 1 transmits power to the second motor 2 through the driving gear 59, the transmission gear 57, the connecting shaft 55, the clutch 524, the sliding output gear 521, and the input gear 21 in sequence, and the second motor 2 transmits power to the second output shaft 4 through the driving gear 59, the transmission gear 57, the connecting shaft 55, the linkage gear 571 and the connecting gear 56 in sequence, so as to increase torque and enhance the ability to escape from difficulties.

[0044] like Figure 3 As shown, it is the third preferred embodiment of the utility model, wherein the first transmission assembly and the second transmission assembly both include a connecting shaft 55 arranged between the motor shaft of the first motor 1 and the first output shaft 3 and between the motor shaft of the second motor 2 and the second output shaft 4, one end of the connecting shaft 55 is provided with a transmission gear 57, and the other end is provided with a linkage gear 571, the motor shafts of the first motor 1 and the second motor are fixedly provided with a driving gear 59, and the driving gear 59 is meshed with the transmission gear 57; the first output shaft 3 and the second output shaft 4 are fixedly provided with a connecting gear 56, and the linkage gear 571 is meshed with the fixed connecting gear 56. The motor shaft of the second motor 2 is fixedly provided with an input gear 21, the connecting shaft 55 is fixedly provided with a spline 525, and the connecting shaft 55 is also slidably provided with a sliding output gear 521, one side of the sliding output gear 521 can be coupled with the spline 525, and the sliding output gear 521 is meshed with the input gear 21.

[0045] The working process of the third preferred embodiment is briefly described below:

[0046] The first motor 1 and the second motor 2 are started, and the first motor transmits power to the first output shaft 3 through the driving gear 59, the transmission gear 57, the connecting shaft 55, the linkage gear 571 and the connecting gear 56 in sequence. At the same time, the second motor 2 transmits power to the second output shaft 4 through the driving gear 59, the transmission gear 57, the connecting shaft 55, the linkage gear 571 and the connecting gear 56 in sequence.

[0047] When the car is driving in adverse conditions, such as one side of the tire is slipping, the sliding output gear 521 is coupled to the spline 525. At this time, the second motor 2 transmits power to the first output shaft 3 through the input gear 21, the sliding output gear 521, the spline 525, the connecting shaft 55, the linkage gear 571 and the connecting gear 56 in sequence; similarly, the first motor transmits power to the second motor 2 through the driving gear 59, the transmission gear 57, the connecting shaft 55, the spline 525 and the sliding output gear 521 in sequence, and the second motor 2 transmits power to the second output shaft 4 through the driving gear 59, the transmission gear 57, the connecting shaft 55, the linkage gear 571 and the connecting gear 56 in sequence to increase torque and enhance the ability to escape from difficulties.

[0048] like Figure 4 As shown, it is the fourth preferred embodiment of the utility model, wherein the first transmission assembly and the second transmission assembly both include a connecting shaft 55 arranged between the motor shaft of the first motor 1 and the first output shaft 3 and between the motor shaft of the second motor 2 and the second output shaft 4, one end of the connecting shaft 55 is provided with a transmission gear 57, and the other end is provided with a linkage gear 571, the motor shafts of the first motor 1 and the second motor are fixedly provided with a driving gear 59, and the driving gear 59 is meshed with the transmission gear 57; the first output shaft 3 and the second output shaft 4 are fixedly provided with a connecting gear 56, and the linkage gear 571 is meshed with the fixed connecting gear 56. The motor shaft of the first motor 1 is fixedly provided with an input gear 21, and a sliding output gear 521 meshing with the input gear 21 is sleeved on the connecting shaft 55, and a clutch 524 that can be coupled with the sliding output gear 521 is also fixedly provided on the connecting shaft 55.

[0049] The working process of the fourth preferred embodiment is briefly described below:

[0050] The first motor 1 and the second motor 2 are started, and the first motor transmits power to the first output shaft 3 through the driving gear 59, the transmission gear 57, the connecting shaft 55, the linkage gear 571 and the connecting gear 56 in sequence. At the same time, the second motor 2 transmits power to the second output shaft 4 through the driving gear 59, the transmission gear 57, the connecting shaft 55, the linkage gear 571 and the connecting gear 56 in sequence.

[0051] When the car is driving in adverse conditions, such as one side of the tire is slipping, the sliding output gear 521 is coupled with the clutch 524. At this time, the first motor 1 transmits power to the second output shaft 4 through the input gear 21, the sliding output gear 521, the clutch 524, the connecting shaft 55, the linkage gear 571 and the connecting gear 56 in sequence; similarly, the second motor 2 transmits power to the first motor 1 through the driving gear 59, the transmission gear 57, the connecting shaft 55, the clutch 524 sliding output gear 521, and the input gear 21 in sequence. The first motor transmits power to the first output shaft 3 through the driving gear 59, the transmission gear 57, the connecting shaft 55, the linkage gear 571 and the connecting gear 56 in sequence to increase torque and enhance the ability to escape from difficulties.

[0052] like Figure 5 As shown, it is the fifth preferred embodiment of the utility model, the first transmission assembly and the second transmission assembly both include a connecting shaft 55 arranged between the motor shaft of the first motor 1 and the first output shaft 3 and between the motor shaft of the second motor 2 and the second output shaft 4, one end of the connecting shaft 55 is provided with a transmission gear 57, and the other end is provided with a linkage gear 571, the motor shafts of the first motor 1 and the second motor are fixedly provided with a driving gear 59, and the driving gear 59 is meshed with the transmission gear 57; the first output shaft 3 and the second output shaft 4 are fixedly provided with a connecting gear 56, and the linkage gear 571 is meshed with the fixed connecting gear 56. The motor shaft of the first motor 1 is fixedly provided with an input gear 21, the connecting shaft 55 is fixedly provided with a spline 525, and the connecting shaft 55 is also provided with a sliding output gear 521, one side of the sliding output gear 521 can be coupled with the spline 525, and the sliding output gear 521 is meshed with the input gear 21.

[0053] The working process of the fifth preferred embodiment is briefly described below:

[0054] The first motor 1 and the second motor 2 are started, and the first motor 1 transmits power to the first output shaft 3 through the driving gear 59, the transmission gear 57, the connecting shaft 55, the linkage gear 571 and the connecting gear 56 in sequence. At the same time, the second motor 2 transmits power to the second output shaft 4 through the driving gear 59, the transmission gear 57, the connecting shaft 55, the linkage gear 571 and the connecting gear 56 in sequence.

[0055] When the car is driving in adverse conditions, such as one side of the tire is slipping, the sliding output gear 521 is coupled to the spline 525. At this time, the first motor 1 transmits power to the second output shaft 4 in sequence through the input gear 21, the sliding output gear 521, the spline 525, the connecting shaft 55, the linkage gear 571 and the connecting gear 56; similarly, the first motor transmits power to the first motor 1 in sequence through the driving gear 59, the transmission gear 57, the connecting shaft 55, the spline 525, the sliding output gear 521, the input gear 21, and the first motor 1 transmits power to the first output shaft 3 in sequence through the driving gear 59, the transmission gear 57, the connecting shaft 55, the linkage gear 571 and the connecting gear 56 to increase torque and enhance the ability to escape from difficulties.

[0056] like Figure 6 As shown, it is the sixth preferred embodiment of the utility model, the transmission assembly includes a sun gear 51 fixedly mounted on the first motor 1 and the second motor 2, the sun gear 51 is provided with a ring gear 52, a planetary gear 53 meshing with the ring gear 52 and the sun gear 51 is provided between the ring gear 52 and the sun gear 51, a planetary carrier 54 is fixedly mounted on the planetary gear 53, and the planetary carrier 54 is fixed to the housing of the system; a connecting shaft 55 is fixedly mounted on the ring gear 52, a connecting gear 56 is fixedly mounted on the connecting shaft 55, a transmission gear 57 is fixedly mounted on the first output shaft 3 and the second output shaft 4, and the transmission gear 57 meshes with the connecting gear 56. A sliding output gear 521 is fixedly provided on the first gear ring 52, an input gear 21 is fixedly provided on the motor shaft of the second motor 2, an idler shaft 522 is provided between the input gear 21 and the sliding output gear 521, an idler wheel 523 is hollowly sleeved on the idler shaft 522, the idler wheel 523 can move axially on the idler shaft 522, and the idler wheel 523 is respectively meshed with the input gear 21 and the sliding output gear 521.

[0057] The working process of the sixth preferred embodiment is briefly described below:

[0058] The first motor 1 and the second motor 2 are started, and the power is transmitted to the first output shaft 3 and the second output shaft 4 in sequence through the sun gear 51, the planetary gear 53, the ring gear 52, the connecting shaft 55, the connecting gear 56 and the transmission gear 57 to drive the wheel hub to rotate.

[0059] When the car is driving in a bad condition, such as one side of the tire is slipping, the second motor 2 starts to transmit power to the ring gear 52 through the input gear 21, the idler gear 523 and the sliding output gear 521, and then transmits it to the first output shaft 3 through the connecting shaft 55, the connecting gear 56 and the transmission gear 57; similarly, the first motor 1 passes through the sun gear 51, the planetary gear 53, the ring gear 52, the sliding output gear 521, the idler gear 523, and the input gear 21 to the second motor 2 in sequence, and the second motor 2 passes through the sun gear 51, the planetary gear 53, the ring gear 52, through the connecting shaft 55, the connecting gear 56 and the transmission gear 57 to the first output shaft 4 to increase the torque and enhance the ability to get out of trouble.

[0060] like Figure 7 As shown, it is the seventh preferred embodiment of the utility model, the transmission assembly includes a sun gear 51 fixedly mounted on the first motor 1 and the second motor 2, the sun gear 51 is sleeved with a ring gear 52, the ring gear 52 is fixed to the housing of the system, a planetary gear 53 is arranged between the ring gear 52 and the sun gear 51, a planetary carrier 54 is fixedly mounted on the planetary gear 53, a connecting shaft 55 is fixedly mounted on the planetary carrier 54, a connecting gear 56 is fixedly mounted on the connecting shaft 55, a transmission gear 57 is fixedly mounted on the first output shaft 3 and the second output shaft 4, the transmission gear 57 is meshed with the connecting gear 56.

[0061] The working process of the seventh preferred embodiment is briefly described below:

[0062] The first motor 1 and the second motor 2 are started, and the power is transmitted to the first output shaft 3 and the second output shaft 4 through the sun gear 51, the planetary gear 53, the planetary carrier 54, the connecting shaft 55, the connecting gear 56 and the transmission gear 57 in sequence, so as to drive the wheel hub to rotate.

[0063] It should be understood that although this specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation mode may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0064] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the utility model. They are not intended to limit the protection scope of the utility model. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. Dual motor drive system, characterized by: The invention comprises a first motor (1) and a second motor (2) which are arranged in an upper and lower manner, wherein the first motor (1) and the second motor (2) are close to each other and their motor shafts are arranged opposite to each other, the motor shaft of the first motor (1) is transmission-connected to a first output shaft (3) through a first transmission component, the motor shaft of the second motor (2) is transmission-connected to a second output shaft (4) through a second transmission component, the first output shaft (3) and the second output shaft (4) are coaxial, and the distance between the first output shaft (3) and the motor shaft of the first motor (1) is equal to the distance between the second output shaft (4) and the motor shaft of the second motor (2).

2. The dual-motor drive system according to claim 1, characterized in that: The first transmission assembly comprises a first sun gear (51) fixedly mounted on a motor shaft of a first motor (1); a first gear ring (52) is sleeved on the first sun gear (51); a first planet gear (53) meshing with the first sun gear (51) is provided between the first gear ring (52) and the first sun gear (51); a planet carrier (54) is fixedly mounted on the first planet gear (53); the planet carrier (54) is fixedly mounted on a housing of the system; a second sun gear (58) is fixedly mounted on the first gear ring (52); a second gear ring (581) is sleeved on the second sun gear (58); the second gear ring (581) is fixedly mounted on the housing of the system; a second planet gear (582) meshing with the second sun gear (58) is provided between the second gear ring (581) and the second sun gear (58); a second planet carrier (583) is fixedly mounted on the second planet gear (582); and the first output shaft (3) is fixedly mounted on the second planet carrier (583); The second transmission assembly comprises a driving gear (59) fixedly mounted on the motor shaft of the second motor (2); a connecting shaft (55) coaxial with the second output shaft (4) is provided on one side of the driving gear (59); a connecting gear (56) is fixedly mounted on the connecting shaft (55); a transmission gear (57) meshing with each other is provided between the connecting gear (56) and the driving gear (59); a third sun gear (50) is fixedly mounted on the other end of the connecting shaft (55); a third gear ring (501) is sleeved on the third sun gear (50); the third gear ring (501) is fixedly mounted on the housing of the system; a third planetary gear (502) meshing with the third sun gear (501) is provided between the third gear ring (501) and the third sun gear (50); a third planetary carrier (503) is fixedly mounted on the third planetary gear (502); and the second output shaft (4) is fixedly mounted on the third planetary carrier (503); A sliding output gear (521) is fixedly provided on the first gear ring (52); an input gear (21) is fixedly provided on the motor shaft of the second motor (2); an idler shaft (522) is provided between the input gear (21) and the sliding output gear (521); an idler wheel (523) is sleeved on the idler shaft (522); the idler wheel (523) is axially movable on the idler shaft (522); and the idler wheel (523) is respectively meshed with the input gear (21) and the sliding output gear (521).

3. The dual-motor drive system according to claim 1, characterized in that: The first transmission assembly and the second transmission assembly both comprise a connecting shaft (55) arranged between the motor shaft of the first motor (1) and the first output shaft (3), and arranged between the motor shaft of the second motor (2) and the second output shaft (4); one end of the connecting shaft (55) is provided with a transmission gear (57), and the other end is provided with a linkage gear (571); a driving gear (59) is fixedly provided on the motor shafts of the first motor (1) and the second motor, and the driving gear (59) meshes with the transmission gear (57); and a connecting gear (56) is fixedly provided on the first output shaft (3) and the second output shaft (4), and the linkage gear (571) meshes with the fixed connecting gear (56).

4. The dual-motor drive system according to claim 3, characterized in that: An input gear (21) is fixedly provided on the motor shaft of the second motor (2), a sliding output gear (521) meshing with the input gear (21) is hollowly sleeved on the connecting shaft (55), and a clutch (524) that can be coupled with the sliding output gear (521) is also fixedly provided on the connecting shaft (55).

5. The dual-motor drive system according to claim 3, characterized in that: An input gear (21) is fixedly provided on the motor shaft of the second motor (2), a spline keypad (525) is fixedly provided on the connecting shaft (55), and a sliding output gear (521) is further provided on the connecting shaft (55), one side of the sliding output gear (521) can be coupled to the spline keypad (525), and the sliding output gear (521) is meshed with the input gear (21).

6. The dual-motor drive system according to claim 3, characterized in that: An input gear (21) is fixedly provided on the motor shaft of the first motor (1), a sliding output gear (521) meshing with the input gear (21) is hollowly sleeved on the connecting shaft (55), and a clutch (524) that can be coupled with the sliding output gear (521) is also fixedly provided on the connecting shaft (55).

7. The dual-motor drive system according to claim 3, characterized in that: An input gear (21) is fixedly provided on the motor shaft of the first motor (1), a spline keypad (525) is fixedly provided on the connecting shaft (55), and the connecting shaft (55) is further provided with a sliding output gear (521), one side of the sliding output gear (521) can be coupled to the spline keypad (525), and the sliding output gear (521) is meshed with the input gear (21).

8. The dual-motor drive system according to claim 1, characterized in that: The first transmission assembly and the second transmission assembly both comprise a first sun gear (51) fixedly mounted on the first motor (1) and the second motor (2); a first ring gear (52) is sleeved on the first sun gear (51); a first planet gear (53) meshing with the first ring gear (52) and the first sun gear (51) is provided between the first ring gear (52) and the first sun gear (51); a first planet carrier (54) is fixedly mounted on the first planet gear (53); the first planet carrier (54) is fixedly mounted on the housing of the system; a connecting shaft (55) is fixedly mounted on the first ring gear (52); a connecting gear (56) is fixedly mounted on the connecting shaft (55); and the first output shaft (3 ) and a second output shaft (4) are fixedly provided with a transmission gear (57), the transmission gear (57) being meshed with the connecting gear (56); a sliding output gear (521) is fixedly provided on the first gear ring (52), an input gear (21) is fixedly provided on the motor shaft of the second motor (2), an idler shaft (522) is provided between the input gear (21) and the sliding output gear (521), an idler wheel (523) is hollowly sleeved on the idler shaft (522), the idler wheel (523) is axially movable on the idler shaft (522), and the idler wheel (523) is respectively meshed with the input gear (21) and the sliding output gear (521).

9. The dual-motor drive system according to claim 1, characterized in that: The first transmission assembly and the second transmission assembly both comprise a first sun gear (51) fixedly mounted on the first motor (1) and the second motor (2); a first ring gear (52) is sleeved on the first sun gear (51); the first ring gear (52) is fixed on a housing of the system; a first planet gear (53) is arranged between the first ring gear (52) and the first sun gear (51); a first planet carrier (54) is fixedly mounted on the first planet gear (53); a connecting shaft (55) is fixedly mounted on the first planet carrier (54); a connecting gear (56) is fixedly mounted on the connecting shaft (55); a transmission gear (57) is fixedly mounted on the first output shaft (3) and the second output shaft (4); the transmission gear (57) is meshed with the connecting gear (56).

10. The dual-motor drive system according to claim 2 or 3, characterized in that: The first motor (1) and the second motor (2) share a motor housing and are electrically connected to a battery.

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