Dual-motor planetary coupling drive device and vehicle

Abstract

The present invention provides a dual-motor planetary coupling drive device and a vehicle, and relates to the field of power transmission technology. The dual-motor planetary coupling drive device includes a first motor, a second motor, a first output shaft, a second output shaft, a single-row planetary reduction transmission mechanism, and a double-row planetary reduction transmission mechanism. The vehicle includes a dual-motor planetary coupling drive device. The first motor and the second motor can both output power to the first output shaft and the second output shaft through the single-row planetary reduction transmission mechanism and the double-row planetary reduction transmission mechanism, and the speed difference between the first end wheel and the second end wheel is adjusted by the double-row planetary gear, so that the overall structure can be simplified and compact, thereby reducing the layout space.

Description

Technical Field

[0001] The present invention relates to the technical field of power transmission, and in particular to a dual-motor planetary coupling drive device and a vehicle. Background Art

[0002] With the vigorous development of the new energy industry, passengers have put forward more stringent requirements for the vehicle's acceleration ability, cruising range, driving pleasure, etc. Therefore, the motor needs to further improve the torque, enhance the continuous power of the motor at high speed, and strengthen the dynamic control of the wheel end. Based on this, dual-motor distributed drive came into being.

[0003] In the related art, the driving device equipped in the vehicle includes a first motor, a second motor, a first reducer, a second reducer, a first differential and a second differential. The first motor is connected to the first reducer, the first reducer is connected to the first differential, the first differential is used to connect to the left output shaft, the second motor is connected to the second reducer, the second reducer is connected to the second differential, the second differential is used to connect to the right output shaft, the left output shaft is connected to the left end wheel, and the right output shaft is connected to the right end wheel. The first motor and the second motor are the same, and the first differential and the second differential are both differentials with torque vector control function. The speed and torque of the left wheel are controlled by the first motor, the first reducer and the first differential, and the speed and torque of the right end wheel are controlled by the second motor, the second reducer and the second differential.

[0004] However, the drive device equipped in the vehicle has the problem of occupying a large layout space. Summary of the invention

[0005] The present invention provides a dual-motor planetary coupling drive device and a vehicle to solve the problem that the drive device equipped on the vehicle will occupy a large layout space.

[0006] In one aspect, the present invention provides a dual-motor planetary coupling drive device, comprising a first motor, a second motor, a first output shaft, a second output shaft, a single-row planetary reduction transmission mechanism, and a double-row planetary reduction transmission mechanism;

[0007] The single-row planetary reduction transmission mechanism comprises a single-row planetary gear, a single-row planetary gear ring and a single-row planet carrier, the first motor shaft of the first motor is meshed with the single-row planetary gear, the single-row planetary gear is meshed with the single-row planetary gear ring, the single-row planetary gear is rotatably mounted on the single-row planet carrier, the single-row planet carrier is connected to the first output shaft, and the first output shaft is used to drive the first end wheel;

[0008] The double-row planetary reduction transmission mechanism includes a double-row planetary gear, a double-row planetary gear ring, a double-row planetary carrier and a double-row cover plate. The second motor shaft of the second motor is meshed with the double-row planetary gear, the double-row planetary gear is meshed with the double-row planetary gear ring, the double-row planetary gear is rotatably mounted on the double-row planetary carrier, the double-row planetary carrier and the double-row cover plate are fixedly connected, the double-row cover plate is splined to the single-row planetary gear ring, the double-row planetary gear is respectively connected to the first output shaft and the second output shaft, and the second output shaft is used to drive the second end wheel;

[0009] The first motor is used to output power to the first output shaft and the second output shaft through the single-row planetary reduction transmission mechanism and the double-row planetary reduction transmission mechanism; the second motor is used to output power to the first output shaft and the second output shaft through the single-row planetary reduction transmission mechanism and the double-row planetary reduction transmission mechanism; the double-row planetary gear is used to adjust the speed difference between the first end wheel and the second end wheel.

[0010] Optionally, it further comprises a first output gear and a second output gear;

[0011] The first output gear is connected to the single-row planet carrier via a spline, the first output gear is connected to the first output shaft via a spline, and the first output gear is meshed with the double-row planet gear;

[0012] The second output gear is meshed with the double-row planetary gear, and the second output gear is connected to the second output shaft via a spline.

[0013] Optionally, the double-row planetary gear comprises a plurality of first planetary gears, a plurality of second planetary gears and a plurality of third planetary gears;

[0014] A plurality of the first star gears are meshed between the helical teeth of the second motor shaft and the double-row planetary gear ring, and a plurality of the first star gears are rotatably mounted between the double-row planet carrier and the double-row cover plate;

[0015] The second star gear is meshed with the second output gear, and the third star gear is meshed with the first output gear. Multiple second star gears and multiple third star gears are rotatably installed between the double-row planetary carrier and the double-row cover plate. Multiple second star gears and multiple third star gears are staggered in the axial direction of the second output shaft. Multiple second star gears and multiple third star gears are spaced apart, and each second star gear is meshed with one third star gear.

[0016] Optionally, the single-row planetary reduction transmission mechanism further comprises a single-row planetary gear pin, and the single-row planetary gear is rotatably mounted on the single-row planet carrier through the single-row planetary gear pin;

[0017] The double-row planetary reduction transmission mechanism also includes double-row planetary gear pins, and the first star gear, the second star gear and the third star gear are all rotatably installed between the double-row planet carrier and the double-row cover plate through the double-row planetary gear pins.

[0018] Optionally, it also includes a shell and two shell cover plates, the two shell cover plates are detachably installed at both ends of the shell, the first motor, the second motor, the single-row planetary reduction transmission mechanism and the double-row planetary reduction transmission mechanism are located in the shell, and the first output shaft and the second output shaft are respectively passed through the two shell cover plates.

[0019] Optionally, it also includes a first bearing, a second bearing and a third bearing, the first bearing is supported between the single-row planet carrier and the double-row cover plate, the second bearing is supported between the single-row planet carrier and the housing, and the third bearing is installed between the single-row planetary gear ring and the housing.

[0020] Optionally, a fourth bearing and a fifth bearing are further included, wherein the fourth bearing is supported between the double-row planet carrier and the housing, and the fifth bearing is installed between the double-row cover plate and the housing.

[0021] Optionally, the first output shaft is located at the center of the first motor shaft, the second output shaft is located at the center of the second motor shaft, the first output shaft is coaxially arranged with the first motor shaft, and the second output shaft is coaxially arranged with the second motor shaft.

[0022] Optionally, the first motor is an oil-cooled motor, comprising a first inner shell, a first stator assembly, a first rotor assembly and the first motor shaft, the first stator assembly, the first rotor assembly and the first motor shaft being arranged in the first inner shell, a first motor shaft oil circuit and a first stator oil circuit being arranged on the first inner shell, the first stator oil circuit comprising a first stator branch and a second stator branch leading to the first stator assembly, the first motor shaft oil circuit comprising a first oil channel formed on the surface of the first inner shell, the first stator branch comprising a second oil channel on the surface of the first inner shell, and the second stator branch comprising an oil through hole arranged in the first oil channel.

[0023] In another aspect, the present invention provides a vehicle comprising the dual-motor planetary coupling drive device as described above.

[0024] The present invention provides a dual-motor planetary coupling drive device and a vehicle, wherein the first motor and the second motor can output power to the first output shaft and the second output shaft through a single-row planetary reduction transmission mechanism and a double-row planetary reduction transmission mechanism, and the speed difference between the first end wheel and the second end wheel is adjusted by the double-row planetary gears, so that the overall structure can be simplified and compact, thereby reducing the layout space. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0026] Figure 1 A schematic structural diagram of a dual-motor planetary coupling drive device provided by an embodiment of the present invention;

[0027] Figure 2 for Figure 1 A schematic cross-sectional view of a dual-motor planetary coupling drive device;

[0028] Figure 3 for Figure 2 A partial schematic diagram of a dual-motor planetary coupling drive device;

[0029] Figure 4 for Figure 3 A cross-sectional schematic diagram of a dual-motor planetary coupling drive device;

[0030] Figure 5 for Figure 3 An exploded schematic diagram of a dual-motor planetary coupling drive device;

[0031] Figure 6 for Figure 3 An exploded schematic diagram of a single-row planetary reduction transmission mechanism;

[0032] Figure 7 for Figure 3 An exploded schematic diagram of a double-row planetary reduction transmission mechanism;

[0033] Figure 8 for Figure 2 A partial cross-sectional diagram of the dual-motor planetary coupling drive device.

[0034] Description of reference numerals:

[0035] 10-first motor; 11-first motor shaft;

[0036] 12-first inner shell; 13-first stator assembly;

[0037] 14-first rotor assembly; 20-second motor;

[0038] 21- second motor shaft; 30- first output shaft;

[0039] 40-second output shaft; 50-single-row planetary reduction transmission mechanism;

[0040] 51-single-row planetary gear; 52-single-row planetary ring gear;

[0041] 53-single-row planet carrier; 54-single-row planet gear pin;

[0042] 60- double-row planetary reduction transmission mechanism; 61- double-row planetary gear;

[0043] 611-first star gear; 612-second star gear;

[0044] 613-third star gear; 62-double-row planetary gear ring;

[0045] 63- double-row planet carrier; 64- double-row cover plate;

[0046] 65-double-row planetary gear pin; 71-first output gear;

[0047] 72-second output gear; 811-shell body;

[0048] 812-shell side plate; 82-shell cover plate;

[0049] 83-first bearing; 84-second bearing;

[0050] 85-third bearing; 86-fourth bearing;

[0051] 87-fifth bearing; 88-sixth bearing;

[0052] 89-seventh bearing; A1-first motor shaft oil circuit;

[0053] B1-first stator branch; B2-second stator branch;

[0054] B3-third stator branch; C1-first bearing oil circuit;

[0055] C2-Second bearing oil circuit. DETAILED DESCRIPTION

[0056] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0057] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0058] In the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", "fixation" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0059] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0060] In the above description, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means 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 may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0061] In the related art, the driving device equipped with the vehicle includes a first motor, a second motor, a first reducer, a second reducer, a first differential and a second differential. The first motor is connected to the first reducer, the first reducer is connected to the first differential, the first differential is used to connect to the left output shaft, the second motor is connected to the second reducer, the second reducer is connected to the second differential, the second differential is used to connect to the right output shaft, the left output shaft is connected to the left end wheel, the right output shaft is connected to the right end wheel, the first motor and the second motor are the same, the first differential and the second differential are both differentials with torque vector control function, the speed and torque of the left wheel are controlled by the first motor, the first reducer and the first differential, and the speed and torque of the right end wheel are controlled by the second motor, the second reducer and the second differential. However, each motor of the driving device equipped with the vehicle is configured with a reducer and a differential, resulting in a large space for the driving device. In addition, the first differential and the second differential themselves occupy a large space, which also results in a large space for the driving device.

[0062] In order to solve the above problems, the present invention provides a dual-motor planetary coupling drive device and a vehicle, wherein a single-row planetary reduction transmission mechanism and a double-row planetary reduction transmission mechanism are arranged between the first motor and the second motor to achieve the function of a reducer and a differential. The first motor and the second motor can both output power to the first output shaft and the second output shaft through the single-row planetary reduction transmission mechanism and the double-row planetary reduction transmission mechanism, and the speed difference between the first end wheel and the second end wheel is adjusted by the double-row planetary gears, so that the overall structure can be simplified and compact, thereby reducing the layout space. In addition, the first motor and the second motor can be selectively turned on, and a variety of power drive modes can be provided according to actual conditions. The first motor and the second motor can complement each other's power, thereby improving the driving efficiency.

[0063] The dual-motor planetary coupling drive device and vehicle provided in the embodiments of the present invention are described in detail below in conjunction with specific embodiments.

[0064] Figure 1A schematic structural diagram of a dual-motor planetary coupling drive device provided by an embodiment of the present invention; Figure 2 for Figure 1 A schematic cross-sectional view of a dual-motor planetary coupling drive device; Figure 3 for Figure 2 A partial schematic diagram of a dual-motor planetary coupling drive device; Figure 4 for Figure 3 A cross-sectional schematic diagram of a dual-motor planetary coupling drive device; Figure 5 for Figure 3 Exploded diagram of the dual-motor planetary coupling drive in Figure 1.

[0065] like Figures 1 to 5 As shown, an embodiment of the present invention provides a dual-motor planetary coupling drive device, including a first motor 10, a second motor 20, a first output shaft 30, a second output shaft 40, a single-row planetary reduction transmission mechanism 50, and a double-row planetary reduction transmission mechanism 60. The first motor 10 is connected to the single-row planetary reduction transmission mechanism 50, the second motor 20 is connected to the double-row planetary reduction transmission mechanism 60, the single-row planetary reduction transmission mechanism 50 is connected to the first output shaft 30, and the double-row planetary reduction transmission mechanism 60 is connected to the first output shaft 30 and the second output shaft 40, respectively.

[0066] The first motor 10 is used to output power to the first output shaft 30 and the second output shaft 40 through a single-row planetary reduction transmission mechanism 50 and a double-row planetary reduction transmission mechanism 60; the second motor 20 is used to output power to the first output shaft 30 and the second output shaft 40 through a single-row planetary reduction transmission mechanism 50 and a double-row planetary reduction transmission mechanism 60.

[0067] The first output shaft 30 and the second output shaft 40 are coaxially arranged. The power of the first motor 10 may be equal to the power of the second motor 20 or may be unequal to the power of the second motor 20 .

[0068] The first output shaft 30 can be connected to the first end wheel through a transmission shaft, and the second output shaft 40 can be connected to the second end wheel through a transmission shaft. The first output shaft 30 drives the first end wheel under the action of the single-row planetary reduction transmission mechanism 50 and the double-row planetary reduction transmission mechanism 60, and the second output shaft 40 drives the second end wheel under the action of the single-row planetary reduction transmission mechanism 50 and the double-row planetary reduction transmission mechanism 60. The first end wheel and the second end wheel are two wheels of the vehicle.

[0069] Figure 6 for Figure 3 An exploded schematic diagram of a single-row planetary reduction transmission mechanism; Figure 7 for Figure 3 Exploded diagram of the double-row planetary reduction transmission mechanism.

[0070] like Figure 4 and Figure 6 As shown, the single-row planetary reduction transmission mechanism 50 includes a single-row planetary gear 51, a single-row planetary ring gear 52 and a single-row planetary carrier 53. The first motor shaft 11 of the first motor 10 is meshed with the single-row planetary gear 51, and the single-row planetary gear 51 is meshed with the single-row planetary ring gear 52. The single-row planetary gear 51 is rotatably mounted on the single-row planetary carrier 53, and the single-row planetary carrier 53 is connected to the first output shaft 30.

[0071] The first motor shaft 11 is provided with helical teeth, the helical teeth of the first motor shaft 11 mesh with the single-row planetary gear 51, the inner ring of the single-row planetary gear ring 52 meshes with the single-row planetary gear 51, the single-row planetary gear 51 is located between the first motor shaft 11 and the single-row planetary gear ring 52, and the single-row planetary gear 51 is rotatably mounted on the single-row planetary carrier 53. The single-row planetary gear 51 includes a plurality of planetary gears.

[0072] like Figure 4 and Figure 7 As shown, the double-row planetary reduction transmission mechanism 60 includes a double-row planetary gear 61, a double-row planetary gear ring 62, a double-row planetary carrier 63 and a double-row cover plate 64. The second motor shaft 21 of the second motor 20 is meshed with the double-row planetary gear 61, and the double-row planetary gear 61 is meshed with the double-row planetary gear ring 62. The double-row planetary gear 61 is rotatably installed between the double-row planetary carrier 63 and the double-row cover plate 64. The double-row planetary carrier 63 and the double-row cover plate 64 are fixedly connected. The double-row cover plate 64 is splined to the single-row planetary gear ring 52, and the double-row planetary gear 61 is respectively connected to the first output shaft 30 and the second output shaft 40. The double-row planetary gear 61 includes a plurality of planetary gears.

[0073] The second motor shaft 21 is provided with helical teeth, and the helical teeth of the second motor shaft 21 are meshed with the double-row planetary gears 61 .

[0074] The transmission ratio between the helical teeth on the first motor shaft 11 and the single-row planetary gear 51 can be set according to actual needs. The transmission ratio between the helical teeth on the second motor shaft 21 and the double-row planetary gear 61 can be set according to actual needs.

[0075] The double-row planetary gear 61 can be used to adjust the speed difference between the first end wheel and the second end wheel. The double-row planetary gear ring 62 does not rotate.

[0076] The double-row planet carrier 63 and the double-row cover plate 64 can be fixed together by welding, riveting, bolts or the like.

[0077] When only the first motor 10 is driven, the first motor 10 drives the single-row planetary carrier 53 and the single-row planetary ring gear 52 to rotate by making the single-row planetary gear 51, the single-row planetary carrier 53 outputs power to the first output shaft 30, the single-row planetary ring gear 52 drives the double-row cover plate 64 to rotate, the double-row cover plate 64 drives the double-row planetary gears 61, and the double-row planetary gears 61 can output power to the first output shaft 30 and the second output shaft 40.

[0078] When only the second motor 20 is driven, the second motor 20 rotates the double-row planetary gears 61, and the double-row planetary gears 61 output power to the first output shaft 30 and the second output shaft 40. The double-row planetary gears 61 drive the double-row planetary carrier 63 and the double-row cover plate 64 to rotate. The double-row cover plate 64 drives the single-row planetary ring gear 52 to rotate. The single-row planetary ring gear 52 drives the double-row planetary carrier 63 to rotate through the single-row planetary gears 51, and the single-row planetary carrier 53 outputs power to the first output shaft 30.

[0079] When the first motor 10 and the second motor 20 are driven simultaneously, the first motor 10 rotates the single-row planetary gear 51, and the second motor 20 rotates the double-row planetary gear 61. The power of the first motor 10 and the power of the second motor 20 are coupled through the single-row planetary ring gear 52 and the double-row cover plate 64, so that the single-row planetary ring gear 52 and the double-row cover plate 64 rotate. After the power of the first motor 10 and the power of the second motor 20 are coupled, power is output to the first output shaft 30 through the single-row planetary carrier 53, and power is output to the first output shaft 30 and the second output shaft 40 through the double-row planetary gear 61.

[0080] The dual-motor planetary coupling drive device provided by the embodiment of the present invention has a single-row planetary reduction transmission mechanism 50 and a double-row planetary reduction transmission mechanism 60 arranged between the first motor 10 and the second motor 20. The first motor 10 and the second motor 20 can both output power to the first output shaft 30 and the second output shaft 40 through the single-row planetary reduction transmission mechanism and the double-row planetary reduction transmission mechanism. The speed difference between the first end wheel and the second end wheel is adjusted by the double-row planetary gear 61, so that the overall structure can be simplified and compact, thereby reducing the layout space. In addition, the first motor 10 and the second motor 20 can be selectively turned on, and a variety of power drive modes can be provided according to actual conditions. The first motor 10 and the second motor 20 can complement each other in power, thereby improving the driving efficiency and increasing the cruising range of the whole vehicle.

[0081] Optionally, the power of the first motor 10 is smaller than the power of the second motor 20 .

[0082] The second motor 20 may be a high-power motor, and the first motor 10 may be a medium-power motor.

[0083] The second motor 20 is responsible for the main drive during the vehicle's driving process.

[0084] The first motor 10 can choose whether to drive according to the actual working conditions. For example, when in the working conditions of cornering, skidding, drifting, etc., the second motor 20 drives, and the first motor 10 drives at the same time; when in the straight line working condition, only the second motor 20 is responsible for the main drive.

[0085] Under conditions such as cornering, skidding, and drifting, the speed difference between the first end wheel and the second end wheel can be adjusted by the double-row planetary gears 61. The torque of the first end wheel and the second end wheel can also be increased by adding the drive of the first motor 10. The torque and speed of the first end wheel and the second end wheel can be effectively controlled, thereby optimizing the vehicle's motion posture, improving the vehicle's cornering, speeding, and icy driving capabilities, and enhancing driving pleasure.

[0086] Alternatively, if Figure 5 As shown, the dual-motor planetary coupling drive device also includes a first output gear 71 and a second output gear 72 .

[0087] The first output gear 71 is connected to the single-row planet carrier 53 through a spline, the first output gear 71 is connected to the first output shaft 30 through a spline, and the first output gear 71 is meshed with the double-row planet gear 61. Specifically, the single-row planet carrier 53 can drive the first output shaft 30 to rotate through the first output gear 71, so that the single-row planet carrier 53 outputs power to the first output shaft 30; the double-row planet gear 61 can drive the first output shaft 30 to rotate through the first output gear 71, so that the double-row planet gear 61 outputs power to the first output shaft 30.

[0088] The second output gear 72 meshes with the double-row planetary gear 61, and the second output gear 72 is spline-connected to the second output shaft 40. Specifically, the double-row planetary gear 61 can drive the second output shaft 40 to rotate through the second output gear 72, so that the double-row planetary gear 61 outputs power to the second output shaft 40.

[0089] Alternatively, if Figure 4 and Figure 7 As shown, the double-row planetary gear 61 includes a plurality of first planetary gears 611 , a plurality of second planetary gears 612 , and a plurality of third planetary gears 613 .

[0090] Among them, a plurality of first star gears 611 are meshed between the helical teeth of the second motor shaft 21 and the double-row planetary gear ring 62, and the plurality of first star gears 611 are rotatably installed between the double-row planetary carrier 63 and the double-row cover plate 64. The double-row planetary gear ring 62 does not rotate, and the second motor shaft 21 drives the plurality of first star gears 611 to rotate, so that the double-row planetary carrier 63 and the double-row cover plate 64 can rotate.

[0091] The second star gear 612 is meshed with the second output gear 72, and the third star gear 613 is meshed with the first output gear 71. Multiple second star gears 612 and multiple third star gears 613 are rotatably installed between the double-row planetary carrier 63 and the double-row cover plate 64. Multiple second star gears 612 and multiple third star gears 613 are staggered in the axial direction of the second output shaft 40. Multiple second star gears 612 and multiple third star gears 613 are arranged at intervals, and each second star gear 612 is meshed with a third star gear 613.

[0092] Specifically, the double-row planetary ring gear 62 does not rotate, the second motor shaft 21 can drive the multiple first star gears 611 to rotate, the multiple first star gears 611 drive the double-row planetary carrier 63 and the double-row cover plate 64 to rotate, the double-row planetary carrier 63 and the double-row cover plate 64 drive the multiple second star gears 612 and the multiple third star gears 613 to rotate, the multiple second star gears 612 drive the second output gear 72 to rotate, the second output gear 72 drives the second output shaft 40 to rotate, the multiple third star gears 613 drive the first output gear 71 to rotate, and the first output gear 71 drives the first output shaft 30 to rotate.

[0093] Under conditions such as cornering and drifting, the double-row planetary gear 61 can adjust the speed of the first end wheel and the second end wheel through the second planetary gear 612 and the third planetary gear 613. It should be noted that the principle of the double-row planetary gear 61 in adjusting the speed of the first end wheel and the second end wheel can refer to the principle of the differential.

[0094] When only the first motor 10 is driven, the first motor 10 drives the single-row planetary carrier 53 and the single-row planetary ring gear 52 to rotate by making the single-row planetary gear 51, the single-row planetary carrier 53 outputs power to the first output shaft 30 through the first output gear 71, the single-row planetary ring gear 52 drives the double-row cover plate 64 to rotate, the double-row cover plate 64 drives the second star gear 612 and the third star gear 613 to rotate, the second star gear 612 outputs power to the second output shaft 40 through the second output gear 72, and the third star gear 613 outputs power to the first output shaft 30 through the first output gear 71.

[0095] When only the second motor 20 is driven, the second motor 20 causes the double-row planetary carrier 63 and the double-row cover plate 64 to rotate through the first star gear 611, and the double-row cover plate 64 drives the second star gear 612, the third star gear 613 and the single-row planetary ring gear 52 to rotate. The second star gear 612 outputs power to the second output shaft 40 through the second output gear 72, and the third star gear 613 outputs power to the first output shaft 30 through the first output gear 71. The single-row planetary ring gear 52 can drive the single-row planetary carrier 53 to rotate through the single-row planetary gear 51, and the single-row planetary carrier 53 outputs power to the first output shaft 30 through the first output gear 71.

[0096] When the first motor 10 and the second motor 20 are driven simultaneously, the first motor 10 rotates the single-row planetary gear 51, and the second motor 20 rotates the double-row planetary carrier 63 and the double-row cover plate 64 through the first star gear 611. The power of the first motor 10 and the power of the second motor 20 are coupled through the single-row planetary ring gear 52 and the double-row cover plate 64, so that the single-row planetary ring gear 52 and the double-row cover plate 64 rotate. After the power of the first motor 10 and the power of the second motor 20 are coupled, the single-row planetary carrier 53 is rotated through the single-row planetary gear 51, and the single-row planetary carrier 53 outputs power to the first output shaft 30 through the first output gear 71. After the power of the first motor 10 and the power of the second motor 20 are coupled, the second star gear 612 and the third star gear 613 are driven to rotate through the double-row cover plate 64. The second star gear 612 outputs power to the second output shaft 40 through the second output gear 72, and the third star gear 613 outputs power to the first output shaft 30 through the first output gear 71.

[0097] Alternatively, if Figure 4 and Figure 6 As shown, the single-row planetary reduction transmission mechanism 50 also includes a single-row planetary gear pin 54, and the single-row planetary gear 51 is rotatably mounted on the single-row planetary carrier 53 through the single-row planetary gear pin 54. Specifically, a bearing is configured on the single-row planetary gear pin 54, so that the single-row planetary gear 51 can rotate on the single-row planetary carrier 53.

[0098] like Figure 4 and Figure 7 As shown, the double-row planetary reduction transmission mechanism 60 further includes a double-row planetary gear pin 65, and the first star gear 611, the second star gear 612 and the third star gear 613 are rotatably mounted between the double-row planet carrier 63 and the double-row cover plate 64 through the double-row planetary gear pin 65. Specifically, the double-row planetary gear pin 65 is provided with a bearing, so that the first star gear 611, the second star gear 612 and the third star gear 613 can be rotated on the double-row planet carrier 63 and the double-row cover plate 64.

[0099] Alternatively, if Figure 1 and Figure 2 As shown, the dual-motor planetary coupling drive device also includes a shell and two shell cover plates 82. The two shell cover plates 82 are detachably installed at both ends of the shell. The first motor 10, the second motor 20, the single-row planetary reduction transmission mechanism 50 and the double-row planetary reduction transmission mechanism 60 are located in the shell. The first output shaft 30 and the second output shaft 40 are respectively passed through the two shell cover plates 82.

[0100] The shell includes a shell body 811 and two shell side plates 812 . The two shell side plates 812 are detachably mounted on both sides of the shell body 811 , and the shell cover plate 82 is detachably mounted on the shell side plates 812 .

[0101] like Figure 4 As shown, the dual-motor planetary coupling drive device also includes a first bearing 83, a second bearing 84 and a third bearing 85. The first bearing 83 is supported between the single-row planetary carrier 53 and the double-row cover plate 64, the second bearing 84 is supported between the single-row planetary carrier 53 and the housing, and the third bearing 85 is installed between the single-row planetary ring gear 52 and the housing.

[0102] The dual-motor planetary coupling drive device further includes a fourth bearing 86 and a fifth bearing 87 . The fourth bearing 86 is supported between the double-row planet carrier 63 and the housing, and the fifth bearing 87 is installed between the double-row cover plate 64 and the housing.

[0103] Alternatively, if Figure 4 As shown, the first output shaft 30 is located at the center of the first motor shaft 11, the second output shaft 40 is located at the center of the second motor shaft 21, the first output shaft 30 is coaxially arranged with the first motor shaft 11, and the second output shaft 40 is coaxially arranged with the second motor shaft 21. In this way, the occupied space of the single-row planetary reduction transmission mechanism 50 and the double-row planetary reduction transmission mechanism 60 in the axial and radial directions can be reduced, and the overall structure can be simplified and compact, thereby reducing the layout space.

[0104] Alternatively, if Figure 8 As shown, the first motor 10 is an oil-cooled motor, and the first motor 10 includes a first inner shell 12, a first stator assembly 13, a first rotor assembly 14 and a first motor shaft 11. The first stator assembly 13, the first rotor assembly 14 and the first motor shaft 11 are arranged in the first inner shell 12, and the first motor shaft oil circuit A1 and the first stator oil circuit are arranged on the first inner shell 12. The first stator oil circuit includes a first stator branch B1 and a second stator branch B2 leading to the first stator assembly 13. The first motor shaft oil circuit A1 includes a first oil passage 121 formed on the surface of the first inner shell, the first stator branch B1 includes a second oil passage 122 on the surface of the first inner shell 12, and the second stator branch B2 includes an oil through hole 123 arranged in the first oil passage 121.

[0105] Specifically, the ends of the first motor shaft 11 are provided with a sixth bearing 88 and a seventh bearing 89, and the sixth bearing 88 and the seventh bearing 89 are supported between the first motor shaft 11 and the first inner shell 12. The first rotor assembly 14 is fixed on the first motor shaft 11, and the first stator assembly 13 is fixed on the housing of the dual-motor planetary coupling drive device.

[0106] The housing of the dual-motor planetary coupling drive device is provided with an oil circuit main inlet and an oil circuit main outlet, and the first motor shaft oil circuit A1 and the first stator oil circuit are respectively connected to the oil circuit main inlet.

[0107] The oil passing through the first stator branch B1 can flow to the entire rectangular range of the side surface of the first stator assembly 13 , and the oil passing through the second stator branch B2 can flow to the entire width range of the end surface of the first stator assembly 13 .

[0108] The first motor shaft oil circuit A1 also includes a third oil passage 124 formed in the first output shaft 30 . A sealing ring 31 is provided on the first output shaft 30 . The sealing ring 31 can allow the oil in the first oil passage 121 to flow to the hollow portion between the first output shaft 30 and the first motor shaft 11 through the third oil passage 124 .

[0109] The first motor shaft 11 is provided with a first shaft hole 151 and a second shaft hole 152. The oil between the first output shaft 30 and the first motor shaft 11 flows to the sixth bearing 88 through the first shaft hole 151. The oil between the first output shaft 30 and the first motor shaft 11 can flow to the seventh bearing 89 through the second shaft hole 152, and can also flow to the first stator assembly 13 through the second shaft hole 152.

[0110] A first bearing oil path C1 is formed between the first shaft hole 151 and the sixth bearing 88 , and a second bearing oil path C2 is formed between the second shaft hole 152 and the seventh bearing 89 . A third stator branch path B3 is formed between the second shaft hole 152 and the first stator assembly 13 .

[0111] The oil in the oil pan passes through the filter, electronic pump and oil cooler in sequence to reach the main inlet of the oil circuit, and then flows to the first motor shaft oil circuit A1 and the first stator branch B1 through the main inlet of the oil circuit, and then flows from the first motor shaft oil circuit A1 to the first bearing oil circuit C1, the second bearing oil circuit C2 and the third stator branch B3.

[0112] The second motor 20 is an oil-cooled motor. The structure of the second motor 20 is substantially the same as that of the first motor 10. The oil circuit of the second motor 20 is the same as that of the first motor 10, and the specific oil circuit of the second motor 20 can refer to the oil circuit of the first motor 10.

[0113] An embodiment of the present invention further provides a vehicle, comprising a dual-motor planetary coupling drive device.

[0114] Among them, the dual-motor planetary coupling drive device in this embodiment has the same structure as the dual-motor planetary coupling drive device provided in any of the above embodiments, and can bring the same or similar technical effects, which will not be described one by one here, and specific details can be referred to the description of the above embodiments.

[0115] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A dual-motor planetary coupling drive device, characterized in that: It includes a first motor, a second motor, a first output shaft, a second output shaft, a single-row planetary reduction transmission mechanism and a double-row planetary reduction transmission mechanism; The single-row planetary reduction transmission mechanism comprises a single-row planetary gear, a single-row planetary gear ring and a single-row planet carrier, the first motor shaft of the first motor is meshed with the single-row planetary gear, the single-row planetary gear is meshed with the single-row planetary gear ring, the single-row planetary gear is rotatably mounted on the single-row planet carrier, the single-row planet carrier is connected to the first output shaft, and the first output shaft is used to drive the first end wheel; The double-row planetary reduction transmission mechanism includes a double-row planetary gear, a double-row planetary gear ring, a double-row planetary carrier and a double-row cover plate. The second motor shaft of the second motor is meshed with the double-row planetary gear, the double-row planetary gear is meshed with the double-row planetary gear ring, the double-row planetary gear is rotatably mounted on the double-row planetary carrier, the double-row planetary carrier and the double-row cover plate are fixedly connected, the double-row cover plate is splined to the single-row planetary gear ring, the double-row planetary gear is respectively connected to the first output shaft and the second output shaft, and the second output shaft is used to drive the second end wheel; The first motor is used to output power to the first output shaft and the second output shaft through the single-row planetary reduction transmission mechanism and the double-row planetary reduction transmission mechanism; the second motor is used to output power to the first output shaft and the second output shaft through the single-row planetary reduction transmission mechanism and the double-row planetary reduction transmission mechanism; the double-row planetary gear is used to adjust the speed difference between the first end wheel and the second end wheel; It also includes a first output gear and a second output gear; the first output gear is meshed with the double-row planetary gear; the second output gear is meshed with the double-row planetary gear; The double-row planetary gear comprises a plurality of first planetary gears, a plurality of second planetary gears and a plurality of third planetary gears; A plurality of the first star gears are meshed between the helical teeth of the second motor shaft and the double-row planetary gear ring, and a plurality of the first star gears are rotatably mounted between the double-row planet carrier and the double-row cover plate; The second star gear is meshed with the second output gear, and the third star gear is meshed with the first output gear. Multiple second star gears and multiple third star gears are rotatably installed between the double-row planetary carrier and the double-row cover plate. Multiple second star gears and multiple third star gears are staggered in the axial direction of the second output shaft. Multiple second star gears and multiple third star gears are spaced apart, and each second star gear is meshed with one third star gear.

2. The dual-motor planetary coupling drive device according to claim 1, characterized in that: The first output gear is connected to the single-row planet carrier via a spline, and the first output gear is connected to the first output shaft via a spline; The second output gear is connected to the second output shaft via a spline.

3. The dual-motor planetary coupling drive device according to claim 2, characterized in that: The single-row planetary reduction transmission mechanism further comprises a single-row planetary gear pin, and the single-row planetary gear is rotatably mounted on the single-row planet carrier through the single-row planetary gear pin; The double-row planetary reduction transmission mechanism also includes double-row planetary gear pins, and the first star gear, the second star gear and the third star gear are all rotatably installed between the double-row planet carrier and the double-row cover plate through the double-row planetary gear pins.

4. The dual-motor planetary coupling drive device according to claim 3, characterized in that: It also includes a shell and two shell cover plates, the two shell cover plates are detachably installed at both ends of the shell, the first motor, the second motor, the single-row planetary reduction transmission mechanism and the double-row planetary reduction transmission mechanism are located in the shell, and the first output shaft and the second output shaft are respectively passed through the two shell cover plates.

5. The dual-motor planetary coupling drive device according to claim 4, characterized in that: It also includes a first bearing, a second bearing and a third bearing, wherein the first bearing is supported between the single-row planet carrier and the double-row cover plate, the second bearing is supported between the single-row planet carrier and the housing, and the third bearing is installed between the single-row planetary gear ring and the housing.

6. The dual-motor planetary coupling drive device according to claim 5, characterized in that: It also includes a fourth bearing and a fifth bearing. The fourth bearing is supported between the double-row planet carrier and the housing, and the fifth bearing is installed between the double-row cover plate and the housing.

7. The dual-motor planetary coupling drive device according to any one of claims 1 to 6, characterized in that: The first output shaft is located at the center of the first motor shaft, the second output shaft is located at the center of the second motor shaft, the first output shaft is coaxially arranged with the first motor shaft, and the second output shaft is coaxially arranged with the second motor shaft.

8. The dual-motor planetary coupling drive device according to any one of claims 4 to 6, characterized in that: The first motor is an oil-cooled motor, comprising a first inner shell, a first stator assembly, a first rotor assembly and the first motor shaft, wherein the first stator assembly, the first rotor assembly and the first motor shaft are arranged in the first inner shell, a first motor shaft oil circuit and a first stator oil circuit are arranged on the first inner shell, the first stator oil circuit comprises a first stator branch and a second stator branch leading to the first stator assembly, the first motor shaft oil circuit comprises a first oil passage formed on the surface of the first inner shell, the first stator branch comprises a second oil passage on the surface of the first inner shell, and the second stator branch comprises an oil through hole arranged in the first oil passage.

9. A vehicle, characterized in that: include: A dual-motor planetary coupling drive device as described in any one of claims 1 to 8.

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