Electric drive structure, vehicle and electric device

Abstract

The invention provides an electric drive structure (300), a vehicle (1000) and an electric device. The electric drive structure (300) comprises a transmission assembly (30), a first motor (10), a second motor (20) and an output wheel (40). The transmission assembly (30) comprises a planet carrier (31), a first planet wheel (32), a second planet wheel (33), a first transmission wheel (34) and a second transmission wheel (35), the first planet wheel (32) and the second planet wheel (33) are arranged on the planet carrier (31) and are meshed with each other, the first transmission wheel (34) is meshed with the first planet wheel (32), and the second transmission wheel (35) is meshed with the side, away from the first planet wheel (32), of the second planet wheel (33). The first motor (10) is connected to the first transmission wheel (34), the second motor (20) is connected to the second transmission wheel (35), and the output wheel (40) is connected to the planet carrier (31). The output wheel (40) is connected with the planet carrier (31), so that the gear can adopt an external gear, and the load capacity of the electric drive structure (300) is improved.

Description

Electric drive structure, vehicle and electrical device Technical Field

[0001] The present application belongs to the technical field of speed change structures, and in particular relates to an electric drive structure, a vehicle, and an electric device. Background Art

[0002] With the advancement of battery technology, the use of electric vehicles is becoming increasingly popular. Currently, improving the overall efficiency of electric vehicles (such as peak torque and peak speed) is a key research focus. Improving the overall efficiency of electric vehicles inevitably requires increasing the load on the electric drive structure. However, the complex architecture and poor load capacity of electric drive structures seriously hinder the improvement of overall efficiency.

[0003] Application Contents

[0004] The embodiments of the present application provide an electric drive structure, a vehicle, and an electrical device, which can improve the load capacity of the electric drive structure.

[0005] In a first aspect of the present application, an electric drive structure is provided, comprising a transmission assembly, a first motor, a second motor, and an output gear. The transmission assembly comprises a planetary carrier, a first planetary gear, a second planetary gear, a first transmission gear, and a second transmission gear. The first and second planetary gears are disposed on the planetary carrier and mesh with each other. The first transmission gear meshes with the first planetary gear, and the second transmission gear meshes with a side of the second planetary gear facing away from the first planetary gear. The first motor is connected to the first transmission gear, the second motor is connected to the second transmission gear, and the output gear is connected to the planetary carrier.

[0006] With the above structure, on the one hand, by setting up a transmission assembly, the speed and torque output by the first motor and the second motor can be easily merged and output outwardly through the output wheel, thereby improving the load capacity of the motor and thus improving the overall efficiency of the electric vehicle. On the other hand, by connecting the output wheel to the planetary carrier, the structural characteristics of the compound planetary gear can be fully utilized, and the first transmission wheel, the second transmission wheel, the first planetary gear and the second planetary gear can be set as external gears, effectively optimizing the gear type in the electric drive structure. The use of external gears with lower processing difficulty and higher mechanical strength can also improve the overall strength of the electric drive structure, thereby improving the load capacity of the electric drive structure, reducing the safety risks in the electric drive structure, and improving the reliability of the electric vehicle.

[0007] In some optional embodiments of the present application, the first planetary gear, the second planetary gear, the first transmission gear, and the second transmission gear are all external gears.

[0008] By adopting the above structure, the first planetary gear, the second planetary gear, the first transmission wheel and the second transmission wheel all adopt external gears, which can effectively optimize the gear type in the electric drive structure and improve the overall strength of the electric drive structure.

[0009] In some optional embodiments of the present application, along a first direction, the first planetary gear and the second planetary gear are arranged on one side of the planetary carrier, and the output gear is arranged on the other side of the planetary carrier, and the first direction is parallel to the rotation axis of the transmission assembly.

[0010] By adopting the above structure, by arranging the first planetary gear and the second planetary gear on one side of the planetary carrier and arranging the output gear on the other side of the planetary carrier, the input structure and the output structure on the planetary carrier can be made relatively independent, thereby reducing the risk of mutual interference between the input action and the output action. It can also make the structure of the transmission component more regular, improve the operating stability of the transmission component, and facilitate the arrangement of the circumferential structure of the planetary carrier.

[0011] In some optional embodiments of the present application, the transmission assembly also includes a first transmission shaft and a second transmission shaft. Along the first direction, one end of the first transmission shaft is connected to the first transmission wheel, and the other end is provided with a first connecting wheel. One end of the second transmission shaft is connected to the first transmission wheel, and the other end is provided with a second connecting wheel. The first motor includes a first drive wheel, and the first drive wheel is engaged with the first connecting wheel. The second motor includes a second drive wheel, and the second drive wheel is engaged with the second connecting wheel.

[0012] By adopting the above structure, by setting the first transmission shaft and the second transmission shaft, the first motor and the second motor can be connected to the transmission assembly through the intermediate transmission structure, reducing the impact of the first motor and the second motor on the transmission assembly, and also allowing the setting positions of the first motor and the second motor to be flexibly adjusted.

[0013] In some optional embodiments of the present application, the first connecting wheel, the second connecting wheel, the first driving wheel and the second driving wheel are all external gears.

[0014] By adopting the above structure, the first connecting wheel, the second connecting wheel, the first driving wheel and the second driving wheel all use external gears, which can effectively optimize the gear type in the electric drive structure and improve the overall strength of the electric drive structure.

[0015] In some optional embodiments of the present application, the first planetary gear, the second planetary gear, the first transmission gear, the second transmission gear, the first connecting gear and the second connecting gear are coaxially arranged.

[0016] With the above structure, the first planetary gear, the second planetary gear, the first transmission wheel, the second transmission wheel, the first connecting wheel and the second connecting wheel are coaxially arranged, so that the rotating axes of the rotating parts on the transmission assembly are the same, thereby improving the operating stability of the transmission assembly.

[0017] In some optional embodiments of the present application, along the first direction, the first motor and the second motor are respectively arranged on both sides of the transmission assembly.

[0018] By adopting the above structure, by arranging the first motor and the second motor on both sides of the transmission assembly, on the one hand, the transmission assembly can be located in the middle of the electric drive structure, which is convenient for converging the speed and torque output by the first motor and the second motor. On the other hand, it can also make the arrangement of the electric drive structure more compact and reduce the size of the electric drive structure along the first direction.

[0019] In some optional embodiments of the present application, a transmission hole is provided on the planetary carrier and passes through both sides of the planetary carrier along the first direction, the second transmission shaft is passed through the transmission hole, and the second transmission wheel is provided on the side of the transmission hole close to the first motor, and the second connecting wheel is provided on the side of the transmission hole close to the second motor.

[0020] By adopting the above structure and setting a transmission hole on the planetary carrier, one of the first transmission shaft and the second transmission shaft can be extended from one side of the first planetary gear on the planetary carrier to one side of the output gear, thereby realizing a design in which the two power sources are separated on both sides of the transmission assembly, which facilitates compressing the volume of the electric drive structure and improving the compactness of the electric drive structure.

[0021] In some optional embodiments of the present application, the output wheel is annularly sleeved on the second transmission shaft.

[0022] With the above structure, by configuring the output wheel to be annular and sleeved on the second transmission shaft, the integration degree between the output wheel and the planet carrier can be improved, thereby improving the compactness of the transmission structure.

[0023] In some optional embodiments of the present application, the electric drive structure further includes a first brake and a second brake, the first brake being used to brake the first motor, and the second brake being used to brake the second motor.

[0024] With the above structure, by providing the first brake and the second brake, the first motor and the second motor can be braked separately, thereby realizing dual-motor drive or arbitrary single-motor drive.

[0025] In some optional embodiments of the present application, the electric drive structure further includes a first clutch and a second clutch, the first clutch being used to clutch the first motor and the first transmission wheel, and the second clutch being used to clutch the second motor and the second transmission wheel.

[0026] With the above structure, by providing the first clutch and the second clutch, the first motor and / or the second motor can be separated from the planetary gear, thereby facilitating dual-motor drive or any single-motor drive.

[0027] In some optional embodiments of the present application, the electric drive structure further includes a differential, and the output wheel is rotationally connected to the differential.

[0028] With the above structure, by providing a differential, it is possible to facilitate the output wheel to output the rotational speed and torque outward.

[0029] According to a second aspect of the embodiments of the present application, a vehicle is provided, which includes the above-mentioned electric drive structure.

[0030] A third aspect of the embodiments of the present application provides an electrical device, which includes the above-mentioned electric drive structure.

[0031] Compared with the related art, in the electric drive structure, vehicle and electrical device of the embodiments of the present application, on the one hand, by setting a transmission assembly, it is possible to facilitate the convergence of the speed and torque output by the first motor and the second motor, and output them outward through the output wheel, thereby improving the load capacity of the motor and thus improving the overall efficiency of the electric vehicle. On the other hand, by connecting the output wheel to the planetary carrier, the structural characteristics of the compound planetary gear can be fully utilized, and the first transmission wheel, the second transmission wheel, the first planetary gear and the second planetary gear can be set as external gears, effectively optimizing the gear type in the electric drive structure. The use of external gears with lower processing difficulty and higher mechanical strength can also improve the overall strength of the electric drive structure, thereby improving the load capacity of the electric drive structure, reducing the safety risks existing in the electric drive structure, and improving the reliability of the electric vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The features, advantages and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

[0033] FIG1 is a schematic structural diagram of a vehicle provided in some embodiments of the present application.

[0034] FIG2 is a schematic structural diagram of an electric drive structure provided in some embodiments of the present application.

[0035] In the attached figure:

[0036] 1000. Vehicle; 100. Battery; 200. Controller; 300. Electric drive structure; 10. First motor; 11. First brake; 12. First drive wheel; 13. First drive shaft; 20. Second motor; 21. Second brake; 22. Second drive wheel; 23. Second drive shaft; 30. Transmission assembly; 31. Planetary carrier; 32. First planetary gear; 33. Second planetary gear; 34. First transmission wheel; 35. Second transmission wheel; 36. First transmission shaft; 37. First connecting wheel; 38. Second transmission shaft; 39. Second connecting wheel; 301. Transmission hole; 40. Output wheel; 41. Differential.

[0037] In the accompanying drawings, the drawings are not necessarily drawn to scale. DETAILED DESCRIPTION

[0038] The following detailed description of the embodiments of the present application is provided in conjunction with the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are used to illustrate the principles of the present application, but are not intended to limit the scope of the present application, that is, the present application is not limited to the described embodiments.

[0039] In the description of this application, it should be noted that, unless otherwise specified, "multiple" means more than two; the terms "upper", "lower", "left", "right", "inside", "outside", etc., indicating directions or positional relationships, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. "Vertical" is not strictly perpendicular, but is within the allowable error range. "Parallel" is not strictly parallel, but is within the allowable error range.

[0040] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0041] The directional words that appear in the following description refer to the directions shown in the figures and do not limit the specific structure of this application. It should also be noted that in the description of this application, unless otherwise specified and limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can be fixedly connected, detachably connected, or integrally connected; they can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0042] Currently, electric vehicles are widely used in the market. As electric vehicles continue to develop, the market is placing higher demands on their speed and torque. Increasing the speed and torque of electric vehicles inevitably increases the load on the electric drive structure, so improving the load capacity of electric drive structures is a current research focus.

[0043] In related art, electric drive structures typically consist of multiple sets of cooperating internal and external gears, resulting in a complex structure and the presence of gears of various types and sizes. The inventors noted that due to the varying tolerances of various gear types, the key to further improving the load capacity of electric drive structures lies in the gears with the weakest loads, such as internal gears. When machining accuracy cannot be guaranteed, the mechanical strength of internal gears is typically low, making them vulnerable to becoming weak points in the electric drive structure. This not only affects the overall load capacity of the electric drive structure but also poses certain safety risks, negatively impacting the reliability of electric vehicles.

[0044] In order to solve the problem of poor load capacity of the electric drive structure, the applicant has found that the overall structure of the electric drive structure can be adjusted. Specifically, a transmission assembly is set up to enable multiple power sources to converge, thereby improving the overall efficiency of the electric drive structure. In addition, integrating the output wheel with the planetary carrier in the transmission assembly can reduce the use of internal gears, thereby improving the mechanical strength of the electric drive structure and further improving the load capacity of the electric drive structure.

[0045] Based on the above considerations, the inventors of the present application have conducted in-depth research and designed an electric drive structure, a vehicle and an electric device.

[0046] The present invention provides an electric device using an electric drive structure, which may be, but is not limited to, an electric tool, a battery-powered vehicle, an electric car, a ship, a spacecraft, etc. The spacecraft may include an airplane, a rocket, a space shuttle, a spacecraft, etc.

[0047] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device according to an embodiment of the present application.

[0048] FIG1 is a schematic structural diagram of a vehicle 1000 provided in some embodiments of the present application. As shown in FIG1 , the vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 100 is provided inside the vehicle 1000, and the battery 100 may be provided at the bottom, head or tail of the vehicle 1000. The battery 100 may be used to power the vehicle 1000, for example, the battery 100 may serve as an operating power source for the vehicle 1000. The vehicle 1000 may further include a controller 200 and an electric drive structure 300, the controller 200 being used to control the battery 100 to power the electric drive structure 300, and the electric drive structure 300 being used to provide driving force for the movement of the vehicle 1000, for example, for the starting, navigation and working power requirements of the vehicle 1000 during driving.

[0049] In some embodiments of the present application, the battery 100 can serve not only as an operating power source for the vehicle 1000, but also as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0050] In the embodiments of the present application, the battery mentioned herein refers to a single physical module including one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned herein may include a battery module or a battery pack.

[0051] FIG2 is a schematic diagram of the structure of the electric drive structure provided in some embodiments of the present application. As shown in FIG2 , in some optional embodiments of the present application, an electric drive structure is provided, including a transmission assembly 30, a first motor 10, a second motor 20, and an output wheel 40. The transmission assembly 30 includes a planetary carrier 31, a first planetary gear 32, a second planetary gear 33, a first transmission wheel 34, and a second transmission wheel 35. The first planetary gear 32 and the second planetary gear 33 are arranged on the planetary carrier 31 and meshed with each other. The first transmission wheel 34 meshes with the first planetary gear 32, and the second transmission wheel 35 meshes with the side of the second planetary gear 33 away from the first planetary gear 32. The first motor 10 is connected to the first transmission wheel 34, the second motor 20 is connected to the second transmission wheel 35, and the output wheel 40 is connected to the planetary carrier 31.

[0052] The first motor 10 and the second motor 20 refer to power sources in the electric drive structure, such as electric motors.

[0053] The output gear 40 is a gear for outputting the rotation speed and torque transmitted to the transmission assembly 30 .

[0054] On the one hand, by providing the transmission assembly 30, the speed and torque output by the first motor 10 and the second motor 20 can be easily converged and output outwardly through the output wheel 40, thereby improving the load capacity of the motor and thereby improving the overall efficiency of the electric vehicle. On the other hand, by connecting the output wheel 40 to the planetary carrier 31, the structural characteristics of the compound planetary gear can be fully utilized, and the first transmission wheel 34, the second transmission wheel 35, the first planetary gear 32 and the second planetary gear 33 can be conveniently set as external gears, effectively optimizing the gear type in the electric drive structure. The use of external gears with lower processing difficulty and higher mechanical strength can also improve the overall strength of the electric drive structure, thereby improving the load capacity of the electric drive structure, reducing the safety risks existing in the electric drive structure, and improving the reliability of the electric vehicle.

[0055] Alternatively, the transmission assembly 30 may be a compound planetary gear set, wherein the first transmission wheel 34 and the second transmission wheel 35 serve as the large and small sun gears of the compound planetary gear set, respectively.

[0056] Optionally, the output wheel 40 can be integrally formed with the planet carrier 31 or fixedly connected to the planet carrier 31 in separate parts, such as by welding, gluing, etc.

[0057] Optionally, the first motor 10 and the second motor 20 can be connected to the first transmission wheel 34 and the second transmission wheel 35 through the drive shaft respectively, so that the first transmission wheel 34 and the second transmission wheel 35 input the speed and torque (that is, the first transmission wheel 34 and the second transmission wheel 35 are the input ends), thereby driving the first planetary gear 32 and the second planetary gear 33 to rotate, so that the speed and torque input by the first motor 10 and the second motor 20 converge at the planetary carrier 31 (that is, the planetary carrier 31 is the output end) and are output outward through the output wheel 40.

[0058] As shown in FIG. 1 , in some optional embodiments of the present application, the first planetary gear 32 , the second planetary gear 33 , the first transmission gear 34 , and the second transmission gear 35 are all external gears.

[0059] An external gear refers to a gear whose teeth are arranged on the outer circumference, which can be a cylindrical gear, etc.

[0060] As shown in Figure 2, in some optional embodiments of the present application, along the first direction x, the first planetary gear 32 and the second planetary gear 33 are arranged on one side of the planetary carrier 31, and the output gear 40 is arranged on the other side of the planetary carrier 31, and the first direction x is parallel to the rotation axis of the transmission assembly 30.

[0061] The rotation axis of the transmission assembly 30 refers to the rotation axis about which the transmission assembly 30 can rotate.

[0062] By arranging the first planetary gear 32 and the second planetary gear 33 on one side of the planetary carrier 31 and arranging the output gear 40 on the other side of the planetary carrier 31, the input structure and the output structure on the planetary carrier 31 can be made relatively independent, thereby reducing the risk of mutual interference between the input action and the output action. It can also make the structure of the transmission assembly 30 more regular, improve the operating stability of the transmission assembly 30, and facilitate the arrangement of the circumferential structure of the planetary carrier 31.

[0063] Optionally, the rotation axes of the first planetary gear 32 and the second planetary gear 33 may be parallel to the rotation axis of the transmission assembly 30 .

[0064] As shown in Figure 2, in some optional embodiments of the present application, the transmission assembly 30 also includes a first transmission shaft 36 and a second transmission shaft 38. Along the first direction, one end of the first transmission shaft 36 is connected to the first transmission wheel 34, and the other end is provided with a first connecting wheel 37. One end of the second transmission shaft 38 is connected to the first transmission wheel 34, and the other end is provided with a second connecting wheel 39. The first motor 10 includes a first drive wheel 12, which is engaged with the first connecting wheel 37. The second motor 20 includes a second drive wheel 22, which is engaged with the second connecting wheel 39.

[0065] By setting the first transmission shaft 36 and the second transmission shaft 38, the first motor 10 and the second motor 20 can be connected to the transmission assembly 30 through the intermediate transmission structure, reducing the impact of the first motor 10 and the second motor 20 on the transmission assembly 30, and also allowing the setting positions of the first motor 10 and the second motor 20 to be flexibly adjusted.

[0066] Optionally, the first motor 10 may include a first drive shaft 13 connected to the first drive wheel 12 , and the second motor 20 may include a second drive shaft 23 connected to the second drive wheel 22 .

[0067] Optionally, in a power transmission route with the first motor 10 as the power source, the power output of the first motor 10 is transmitted to the output wheel 40 through the first connecting wheel 37, the first transmission shaft 36, the first transmission wheel 34, the first planetary gear 32, and the planetary carrier 31, and is output to the wheels by the output wheel 40 connected to the differential 41 and other structures.

[0068] Optionally, in the power transmission route with the second motor 20 as the power source, the power output of the second motor 20 is transmitted to the output wheel 40 through the second connecting wheel 39, the second transmission shaft 38, the second transmission wheel 35, the second planetary gear 33, and the planetary carrier 31, and is output to the wheels by the output wheel 40 connected to the differential 41 and other structures.

[0069] Optionally, in a power transmission route with the first motor 10 and the second motor 20 as power source outputs, the power output of the first motor 10 is transmitted to the planetary carrier 31 through the first connecting wheel 37, the first transmission shaft 36, the first transmission wheel 34, and the first planetary gear 32, and the power output of the second motor 20 is transmitted to the planetary carrier 31 through the second connecting wheel 39, the second transmission shaft 38, the second transmission wheel 35, and the second planetary gear 33. After the power output of the first motor 10 and the second motor 20 converge on the planetary carrier 31, it is output by the output wheel 40, and the output wheel 40 is connected to the differential 41 and other structures to transmit it to the wheels.

[0070] As shown in FIG. 2 , in some optional embodiments of the present application, the first connecting wheel 37 , the second connecting wheel 39 , the first driving wheel 12 and the second driving wheel 22 are all external gears.

[0071] As shown in FIG. 2 , in some optional embodiments of the present application, the first planetary gear 32 , the second planetary gear 33 , the first transmission gear 34 , the second transmission gear 35 , the first connecting gear 37 and the second connecting gear 39 are coaxially arranged.

[0072] By coaxially arranging the first planetary gear 32 , the second planetary gear 33 , the first transmission wheel 34 , the second transmission wheel 35 , the first connecting wheel 37 and the second connecting wheel 39 , the rotating axes of the rotating parts on the transmission assembly 30 are made the same, thereby improving the operating stability of the transmission assembly 30 .

[0073] Optionally, the first transmission shaft 36 and the second transmission shaft 38 are coaxially disposed with the first planetary gear 32 .

[0074] As shown in FIG. 2 , in some optional embodiments of the present application, along the first direction x, the first motor 10 and the second motor 20 are respectively arranged on both sides of the transmission assembly 30 .

[0075] By arranging the first motor 10 and the second motor 20 on both sides of the transmission assembly 30, on the one hand, the transmission assembly 30 can be located in the middle of the electric drive structure, which is convenient for converging the speed and torque output by the first motor 10 and the second motor 20. On the other hand, the arrangement of the electric drive structure can be made more compact, reducing the size of the electric drive structure along the first direction.

[0076] Optionally, the second motor 20 and the output wheel 40 may be arranged on the same side.

[0077] As shown in Figure 2, in some optional embodiments of the present application, a transmission hole 301 is provided on the planetary carrier 31, which passes through both sides of the planetary carrier 31 along the first direction, the second transmission shaft 38 is passed through the transmission hole 301, and the second transmission wheel 35 is provided on the side of the transmission hole 301 close to the first motor 10, and the second connecting wheel 39 is provided on the side of the transmission hole 301 close to the second motor 20.

[0078] By setting a transmission hole 301 on the planetary carrier 31, one of the first transmission shaft 36 and the second transmission shaft 38 can be extended from one side of the first planetary gear 32 on the planetary carrier 31 to one side of the output wheel 40, thereby realizing a design in which the two power sources are separated on both sides of the transmission assembly 30, which facilitates compressing the volume of the electric drive structure and improving the compactness of the electric drive structure.

[0079] It can be understood that whether the transmission shaft passing through the transmission hole 301 is specifically the first transmission shaft 36 or the second transmission shaft 38 is determined according to the setting position of the first motor 10 and the second motor 20. When the first motor 10 is set on the side of the output wheel 40, the first transmission shaft 36 is passed through the transmission hole 301, and the first transmission wheel 34 is set on the side of the transmission hole 301 close to the second motor 20, and the first connecting wheel 37 is set on the side of the transmission hole 301 close to the first motor 10.

[0080] As shown in FIG2 , in some optional embodiments of the present application, the output wheel 40 is annularly sleeved on the second transmission shaft 38. By setting the output wheel 40 in an annular shape and sleeved on the second transmission shaft 38, the integration degree of the output wheel 40 and the planet carrier 31 can be improved, thereby improving the compactness of the transmission structure.

[0081] As shown in FIG2 , in some optional embodiments of the present application, the electric drive structure further includes a first brake 11 and a second brake 21. The first brake 11 is used to brake the first motor 10, and the second brake 21 is used to brake the second motor 20. By providing the first brake 11 and the second brake 21, the first motor 10 and the second motor 20 can be braked separately, thereby realizing dual-motor drive or arbitrary single-motor drive.

[0082] As shown in Figure 2, in some optional embodiments of the present application, the electric drive structure further includes a first clutch and a second clutch. The first clutch is used to clutch the first motor and the first transmission wheel, and the second clutch is used to clutch the second motor and the second transmission wheel. By providing the first clutch and the second clutch, the first motor and / or the second motor can be separated from the planetary gear, facilitating dual-motor drive or any single-motor drive.

[0083] It is understood that a clutch or a brake may be provided on the first motor 10 and the second motor 20. For example, the first motor 10 may be provided with a first clutch for separating the first motor 10 from the first connecting wheel 37, and the second motor 20 may be provided with a second clutch for separating the second motor 20 from the second connecting wheel 39.

[0084] As shown in Figure 2, in some optional embodiments of the present application, the electric drive structure further includes a differential 41, and the output wheel 40 is rotationally connected to the differential 41. By providing the differential 41, it is possible to facilitate the output wheel 40 to output speed and torque outward.

[0085] In some optional embodiments of the present application, a vehicle is provided, which includes the above-mentioned electric drive structure.

[0086] In some optional embodiments of the present application, an electric device is provided, which includes the above-mentioned electric drive structure.

[0087] In some optional embodiments of the present application, an electric drive structure is provided, including a transmission assembly 30, a first motor 10, a second motor 20, and an output gear 40. The transmission assembly 30 includes a planetary carrier 31, a first planetary gear 32, a second planetary gear 33, a first transmission gear 34, and a second transmission gear 35. The first planetary gear 32 and the second planetary gear 33 are disposed on the planetary carrier 31 and meshed with each other. The first transmission gear 34 meshes with the first planetary gear 32, and the second transmission gear 35 meshes with the side of the second planetary gear 33 away from the first planetary gear 32. The first planetary gear 32, the second planetary gear 33, the first transmission gear 34, and the second transmission gear 35 are all external gears. The first motor 10 is connected to the first transmission gear 34, the second motor 20 is connected to the second transmission gear 35, and the output gear 40 is connected to the planetary carrier 31. In a first direction, the first planetary gear 32 and the second planetary gear 33 are disposed on one side of the planetary carrier 31, and the output gear 40 is disposed on the other side of the planetary carrier 31. The transmission assembly 30 also includes a first transmission shaft 36 and a second transmission shaft 38. Along the first direction, one end of the first transmission shaft 36 is connected to the first transmission wheel 34, and the other end is provided with a first connecting wheel 37. One end of the second transmission shaft 38 is connected to the first transmission wheel 34, and the other end is provided with a second connecting wheel 39. The first motor 10 includes a first drive wheel 12, which is engaged with the first connecting wheel 37. The second motor 20 includes a second drive wheel 22, which is engaged with the second connecting wheel 39. The first connecting wheel 37, the second connecting wheel 39, the first drive wheel 12 and the second drive wheel 22 are all external gears. Along the first direction, the first motor 10 and the second motor 20 are respectively arranged on both sides of the transmission assembly 30, and the planetary carrier 31 is provided with a transmission hole 301 that passes through both sides of the planetary carrier 31 along the first direction. The second transmission shaft 38 is passed through the transmission hole 301, and the second transmission wheel 35 is arranged at one end of the transmission hole 301 close to the first motor 10, the second connecting wheel 39 is arranged at one end of the transmission hole 301 close to the second motor 20, and the output wheel 40 is annularly sleeved on the second transmission shaft 38.

[0088] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and components may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features described in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions within the scope of the claims.

Claims

1. An electric drive structure, comprising: a transmission assembly comprising a planet carrier, a first planetary gear, a second planetary gear, a first transmission gear, and a second transmission gear, wherein the first planetary gear and the second planetary gear are disposed on the planet carrier and meshed with each other, the first transmission gear meshes with the first planetary gear, and the second transmission gear meshes with a side of the second planetary gear away from the first planetary gear; a first motor connected to the first transmission wheel; a second motor connected to the second transmission wheel; The output wheel is connected to the planet carrier.

2. The electric drive structure according to claim 1, wherein: The first planetary gear, the second planetary gear, the first transmission gear, and the second transmission gear are all external gears.

3. The electric drive structure according to claim 1, wherein: Along a first direction, the first planetary gear and the second planetary gear are arranged on one side of the planetary carrier, and the output gear is arranged on the other side of the planetary carrier. The first direction is parallel to the rotation axis of the transmission assembly.

4. The electric drive structure according to claim 3, wherein: The transmission assembly further includes a first transmission shaft and a second transmission shaft. Along the first direction, one end of the first transmission shaft is connected to the first transmission wheel, and the other end is provided with a first connecting wheel. One end of the second transmission shaft is connected to the first transmission wheel, and the other end is provided with a second connecting wheel. The first motor includes a first driving wheel engaged with the first connecting wheel, and the second motor includes a second driving wheel engaged with the second connecting wheel.

5. The electric drive structure according to claim 4, wherein: The first connecting wheel, the second connecting wheel, the first driving wheel and the second driving wheel are all external gears.

6. The electric drive structure according to claim 4, wherein: The first planetary gear, the second planetary gear, the first transmission gear, the second transmission gear, the first connecting gear and the second connecting gear are coaxially arranged.

7. The electric drive structure according to any one of claims 4 to 6, wherein: Along the first direction, the first motor and the second motor are respectively arranged on both sides of the transmission assembly.

8. The electric drive structure according to claim 7, wherein: The planetary carrier is provided with a transmission hole that passes through both sides of the planetary carrier along the first direction, the second transmission shaft is passed through the transmission hole, and the second transmission wheel is provided on the side of the transmission hole close to the first motor, and the second connecting wheel is provided on the side of the transmission hole close to the second motor.

9. The electric drive structure according to claim 7 or 8, wherein: The output wheel is annularly sleeved on the second transmission shaft.

10. The electric drive structure according to any one of claims 1 to 9, wherein: The electric drive structure further includes a first brake and a second brake, wherein the first brake is used to brake the first motor, and the second brake is used to brake the second motor.

11. The electric drive structure according to any one of claims 1 to 9, wherein: The electric drive structure further includes a first clutch and a second clutch. The first clutch is used to clutch the first motor and the first transmission wheel, and the second clutch is used to clutch the second motor and the second transmission wheel.

12. The electric drive structure according to any one of claims 1 to 11, wherein: The electric drive structure further includes a differential, and the output wheel is rotationally connected to the differential.

13. A vehicle comprising the electric drive structure according to any one of claims 1 to 12.

14. An electrical device, comprising the electric drive structure according to any one of claims 1 to 12.

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