Pure electric dual-motor driving device

Abstract

The utility model discloses a pure electric double-motor driving device which comprises two sets of independent driving assemblies, driving motors on the two sets of driving assemblies are arranged in an up-down separated mode, motor shafts of the driving motors are arranged in a back-to-back output mode, output shafts are arranged on the outer sides of the driving motors, hubs are fixedly arranged on the output shafts, and the hubs are connected with the driving assemblies. The central axis of the output shaft and the symmetric line of the driving motor are coaxially arranged, and the output shaft and a motor shaft of the driving motor are dynamically coupled through a transmission assembly. The device has the advantages that the design is exquisite, the central axis of the output shaft and the symmetric line of the driving motor are coaxially arranged, the gravity center of the device can be located below the Zhongzhou line of the output shaft, reasonable layout and installation are facilitated, the installation efficiency and accuracy are greatly improved, and the device has wide applicability.

Description

Technical Field

[0001] This utility model relates to the field of transmission technology, and more particularly to a pure electric dual-motor drive device. Background Technology

[0002] The rapid development of the automotive industry and the increasing demand for automobiles have driven a continuous rise in automobile production and ownership, thus exacerbating the energy and environmental issues that are currently of widespread concern. Pure electric vehicles, with their characteristics of low noise, zero pollution, diversified energy sources, and high energy efficiency, are an important way to solve the automobile problems in urbanization.

[0003] For example, Chinese patent application number 202421058299.1 discloses a dual-motor drive system, including a first motor and a second motor positioned vertically. The first and second motors are close to each other, but their motor shafts are opposite to each other. The motor shaft of the first motor is connected to a first output shaft via a first transmission assembly, and the motor shaft of the second motor is connected to a second output shaft via a second transmission assembly. The first and second output shafts are coaxial, and the distance between the first output shaft and the first motor shaft is equal to the distance between the second output shaft and the second motor shaft. However, although the first and second output shafts are coaxial, they are not on the line of symmetry between the first and second motors, which leads to a deviation in the system's center of gravity, making installation and layout inconvenient and significantly limiting its functionality. Furthermore, the different structures of the first and second transmission assemblies increase the number of components, increase manufacturing difficulty, and raise the system's complexity. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a pure electric dual-motor drive device.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A pure electric dual-motor drive device includes two independent drive components. The drive motors on the two drive components are arranged vertically and horizontally, with the motor shafts of the drive motors facing away from each other. An output shaft is provided on the outer side of the drive motor, and a hub is fixed on the output shaft. The central axis of the output shaft is coaxial with the line of symmetry of the drive motor. The output shaft and the motor shaft of the drive motor are poweredly coupled through a transmission component.

[0007] Preferably, the transmission assembly includes a planetary carrier fixed to the output shaft, planetary gears pivotally mounted on the planetary carrier, a gear ring meshing with the outer side of the planetary gears, the gear ring being fixed to the transmission; a sun gear meshing with the inner side of the planetary gears, the sun gear being connected to the motor shaft of the drive motor via a linkage.

[0008] Preferably, the linkage includes an output gear fixed on the sun gear, an input gear fixed on the motor shaft of the drive motor, and an idler gear meshing with the input gear and the output gear.

[0009] Preferably, the linkage includes an output gear fixed on the sun gear, and an input gear fixed on the motor shaft of the drive motor, the input gear meshing with the output gear.

[0010] Preferably, one of the output shafts is provided with a traction clutch sleeve, and the other output shaft is provided with a synchronizer, the synchronizer being able to couple with the traction clutch sleeve.

[0011] Preferably, the linkage includes a connecting shaft fixed on the sun gear, an output gear fixed on the connecting shaft, an input gear fixed on the motor shaft of the drive motor, and an idler gear meshing between the input gear and the output gear.

[0012] Preferably, one of the connecting shafts is provided with a traction clutch sleeve, and the other connecting shaft is provided with a synchronizer, the synchronizer being able to couple with the traction clutch sleeve.

[0013] Preferably, the drive motor is electrically connected to the battery.

[0014] The beneficial effects of this utility model are mainly reflected in:

[0015] 1. The design is ingenious. The central axis of the output shaft is coaxial with the symmetrical line of the drive motor, which makes the center of gravity of the device located below the central axis of the output shaft. This facilitates reasonable layout and installation, greatly improves installation efficiency and accuracy, and has a wide range of applicability.

[0016] 2. By using two identical transmission components as power transmission parts, the number of parts is reduced, the design and manufacturing process of the components are optimized, the system complexity is reduced, the reliability and production efficiency are improved, and the vehicle weight reduction is also achieved.

[0017] 3. The transmission components adopt a planetary gear system structure, which enables the device to have a large transmission ratio, reduce the size and weight of the device, make the layout more compact, have high load-bearing capacity, and high transmission efficiency.

[0018] 4. When an electric vehicle is driving in harsh conditions, the synchronizer can couple with the slip sleeve of the traction clutch, which can enhance the torque of the vehicle and thus improve the traction, enabling the vehicle to get out of trouble in time and ensuring the safe driving of the vehicle. At the same time, this design can use a lower specification motor while meeting the same climbing power, which greatly reduces the weight and cost of the vehicle, enhances the acceleration and off-road capability of the vehicle, and improves the handling safety of the vehicle. Attached Figure Description

[0019] The technical solution of this utility model will be further described below with reference to the accompanying drawings:

[0020] Figure 1 : A schematic diagram of the structure of the first embodiment of this utility model;

[0021] Figure 2 : A schematic diagram of the structure of the second embodiment of this utility model;

[0022] Figure 3 : A schematic diagram of the structure of the third embodiment of this utility model;

[0023] Figure 4 : A schematic diagram of the structure of the fourth embodiment of this utility model. Detailed Implementation

[0024] The present invention will now be described in detail with reference to the specific embodiments shown in the accompanying drawings. However, these embodiments are not limited to the present invention, and any structural, methodological, or functional modifications made by those skilled in the art based on these embodiments are included within the protection scope of the present invention.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] like Figures 1 to 4 As shown, this utility model discloses a pure electric dual-motor drive device, which includes two independent drive components. By using two identical drive components, the number of parts can be reduced, the design and manufacturing process of the components can be optimized, the system complexity can be reduced, the reliability and production efficiency can be improved, and the vehicle can also be made lighter.

[0028] The drive motors 1 on the two drive assemblies are positioned vertically and close to each other, electrically connected to the battery, with their motor shafts facing away from each other. This close proximity of the drive motors reduces radial space occupation, making the device more compact, fully utilizing the gearbox space, and ensuring a good overall structure and layout for the vehicle. Of course, the drive motors can also share a single motor housing for optimal layout; both are within the scope of this invention and will not be elaborated upon here.

[0029] An output shaft 2 is provided on the outer side of the drive motor 1, and a hub 3 is fixed on the output shaft 2. The central axis of the output shaft 2 is coaxial with the line of symmetry of the drive motor 1. The output shaft 2 and the motor shaft of the drive motor 1 are dynamically coupled through a transmission assembly 4. The coaxial arrangement of the central axis of the output shaft with the line of symmetry of the drive motor ensures that the center of gravity of the device is below the central axis of the output shaft, facilitating reasonable layout and installation, greatly improving installation efficiency and accuracy, and possessing wide applicability.

[0030] The transmission assembly 4 includes a planetary carrier 41 fixed to the output shaft 2. Planetary gears 42 are pivotally mounted on the planetary carrier 41. A gear ring 43 meshes with the outer side of each planetary gear 42 and is fixed to the gearbox. A sun gear 44 meshes with the inner side of each planetary gear 42 and is connected to the motor shaft of the drive motor 1 via a linkage. This transmission assembly employs a planetary gear train structure, which allows the device to have a large transmission ratio, reduce its size and weight, resulting in a more compact layout, high load-bearing capacity, and high transmission efficiency.

[0031] like Figure 1 As shown, this is the first embodiment of the present invention. The linkage includes an output gear 45 fixed on the sun gear 44, an input gear 46 fixed on the motor shaft of the drive motor 1, and an idler gear 47 meshing with the input gear 46 and the output gear 45.

[0032] The working process of this embodiment is briefly described below: When the drive motor 1 starts, it transmits power to the sun gear 44 in sequence through the input gear 46, idler gear 47 and output gear 45. The sun gear 44 rotates and drives the planet carrier 41 to revolve through the planet gear 42, thereby transmitting power to the output shaft 2 and driving it to rotate.

[0033] like Figure 2As shown, this is the second embodiment of the present invention. Compared with the first embodiment, an escape component is added to the output shaft. Specifically, one of the output shafts 2 is provided with an escape clutch sleeve 21, and the other output shaft 2 is provided with a synchronizer 22. The synchronizer 22 can be coupled with the escape clutch sleeve 21.

[0034] When an electric vehicle is driving in harsh conditions, the synchronizer can couple with the slip sleeve of the traction clutch, which can enhance the vehicle's torque and thus improve traction, enabling the vehicle to get out of trouble in time and ensuring safe driving. At the same time, this design can use a lower-specification motor while meeting the same climbing power requirements, thereby greatly reducing the overall vehicle weight and cost, enhancing the vehicle's acceleration and off-road capabilities, and improving the vehicle's handling safety.

[0035] like Figure 3 As shown, this is the third embodiment of the present invention. The linkage includes an output gear 45 fixed on the sun gear 44, and an input gear 46 fixed on the motor shaft of the drive motor 1. The input gear 46 meshes with the output gear 45.

[0036] The working process of the third embodiment is briefly described below: When the drive motor 1 starts, it transmits power to the sun gear 44 through the input gear 46 and the output gear 45 in sequence. The sun gear 44 rotates and drives the planet carrier 41 to revolve through the planet gear 42, thereby transmitting power to the output shaft 2 and driving it to rotate.

[0037] like Figure 4 As shown, this is the fourth embodiment of the present invention. The linkage includes a connecting shaft 49 fixed on the sun gear 44, an output gear 45 fixed on the connecting shaft 49, an input gear 46 fixed on the motor shaft of the drive motor 1, and an idler gear 47 meshing with the input gear 46 and the output gear 45.

[0038] The working process of this embodiment is briefly described below: When the drive motor 1 starts, it transmits power to the sun gear 44 in sequence through the input gear 46, idler gear 47, output gear 45 and connecting shaft 49. The sun gear 44 rotates and drives the planet carrier 41 to revolve through the planet gear 42, thereby transmitting power to the output shaft 2 and driving it to rotate.

[0039] In the above, one of the connecting shafts 49 is provided with a traction clutch sleeve 21, and the other connecting shaft 49 is provided with a synchronizer 22, which can be coupled with the traction clutch sleeve 21.

[0040] When an electric vehicle is driving in harsh conditions, the synchronizer can couple with the slip sleeve of the traction clutch, which can enhance the vehicle's torque and thus improve traction, enabling the vehicle to get out of trouble in time and ensuring safe driving. At the same time, this design can use a lower-specification motor while meeting the same climbing power requirements, thereby greatly reducing the overall vehicle weight and cost, enhancing the vehicle's acceleration and off-road capabilities, and improving the vehicle's handling safety.

[0041] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0042] The detailed descriptions listed above are merely specific descriptions of feasible implementations of this utility model, and are not intended to limit the scope of protection of this utility model. All equivalent implementations or modifications made without departing from the spirit of this utility model should be included within the scope of protection of this utility model.

Claims

1. A pure electric dual motor drive apparatus, characterized by: The application relates to a driving device for a vehicle, which comprises two sets of independent driving assemblies, driving motors (1) of the two sets of driving assemblies are arranged above and below, and motor shafts of the driving motors (1) are arranged in opposite directions, output shafts (2) are arranged on the outer sides of the driving motors (1), wheel hubs (3) are fixedly arranged on the output shafts (2), the central axes of the output shafts (2) are coaxially arranged with the symmetry lines of the driving motors (1), and power coupling is realized between the output shafts (2) and the motor shafts of the driving motors (1) through transmission assemblies (4).

2. The pure electric dual-motor drive device according to claim 1, characterized in that: The transmission assembly (4) comprises a planet carrier (41) fixedly arranged on the output shaft (2), a planet wheel (42) is pivotally arranged on the planet carrier (41), a gear ring (43) is arranged on the outer side of the planet wheel (42) and engaged with the planet wheel (42), the gear ring (43) is fixedly arranged on a transmission, a sun gear (44) is arranged on the inner side of the planet wheel (42) and engaged with the planet wheel (42), and the sun gear (44) is connected with the motor shaft of the driving motor (1) through a linkage.

3. The pure electric dual-motor drive device according to claim 2, characterized in that: The linkage comprises an output gear (45) fixedly arranged on the sun gear (44), an input gear (46) is fixedly arranged on the motor shaft of the driving motor (1), and an idler gear (47) engaged with the output gear (45) and the input gear (46) is arranged between the output gear (45) and the input gear (46).

4. The pure electric dual-motor drive device according to claim 2, characterized by: The linkage comprises an output gear (45) fixedly arranged on the sun gear (44), an input gear (46) is fixedly arranged on the motor shaft of the driving motor (1), and the input gear (46) is engaged with the output gear (45).

5. The pure electric dual-motor drive apparatus according to claim 3 or 4, characterized by: One of the output shafts (2) is provided with a stuck clutch sliding sleeve (21), the other output shaft (2) is provided with a synchronizer (22), and the synchronizer (22) can be coupled with the stuck clutch sliding sleeve (21).

6. The pure electric dual-motor drive device according to claim 2, characterized by: The linkage comprises a connecting shaft (49) fixedly arranged on the sun gear (44), an output gear (45) is fixedly arranged on the connecting shaft (49), an input gear (46) is fixedly arranged on the motor shaft of the driving motor (1), and an idler gear (47) engaged with the output gear (45) and the input gear (46) is arranged between the output gear (45) and the input gear (46).

7. The pure electric dual-motor drive device according to claim 6, characterized by: One of the output shafts (2) is provided with a stuck clutch sliding sleeve (21), the other output shaft (2) is provided with a synchronizer (22), and the synchronizer (22) can be coupled with the stuck clutch sliding sleeve (21). The driving motor (1) is electrically connected with a storage battery.

8. The pure electric dual-motor drive device according to claim 1, characterized by: ​

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