Dual-motor integral driving system

Abstract

The utility model discloses a double-motor integral type driving system which comprises two sets of independent driving assemblies, each driving assembly comprises a driving motor arranged in a gearbox, motor shafts of the driving motors on the two sets of driving assemblies are arranged in an opposite output mode, and the motor shafts of the driving motors on the two sets of driving assemblies are connected with the gearbox. An output shaft parallel to a motor shaft of the driving motor is arranged on one side of the driving motor, and the output shaft is in power coupling with the motor shaft of the driving motor through a transmission assembly; the transmission assembly at least comprises a planetary gear train, and the planetary gear train is arranged on the output shaft and located between the two end faces of the driving motor. The utility model has the beneficial effects that the structure is compact, the function characteristic of independent output of the left road and the right road is adopted, the independent driving of the left road and the right road is realized, the power formation of the whole vehicle is improved, and the differential control of the left wheel and the right wheel of the whole vehicle is realized. In addition, the system assembly does not need a complex differential mechanism structure, the structure of a power system is simplified, overall layout is facilitated, and the system assembly has wide applicability.

Description

Technical Field

[0001] This utility model relates to the field of gearbox technology, and more particularly to a dual-motor integrated drive system. Background Technology

[0002] Currently, the most commonly used pure electric drive systems on the market include multi-speed transmission devices and traditional drive systems with clutches; multi-speed transmission devices and drive systems without clutches; two independent drive motors and fixed-speed transmission devices with drive shafts; and drive motors and single-stage reducer transmission devices.

[0003] For example, CN109263454B discloses a dual-motor transverse electric drive axle assembly system and a shift control method. The system includes: drive motor I, input shaft I, input shaft I gear, engagement sleeve I, intermediate shaft, intermediate shaft gear I, intermediate shaft gear II, intermediate shaft gear III, three-shaft gear, engagement sleeve II, input shaft II gear, drive motor II, input shaft II, three shafts, drive half-shaft, differential, differential gear, drive wheel, spline connection A, and spline connection B. However, this assembly system uses a mechanical differential, which has a complex structure, low powertrain integration, and increases vehicle weight. Furthermore, the system's power performance is limited by the motor's output power, making it difficult to improve overall vehicle power performance and increasingly unable to meet the power demands of electric vehicles. Utility Model Content

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

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

[0006] A dual-motor integrated drive system includes two independent drive components. Each drive component includes a drive motor housed within a gearbox. The motor shafts of the drive motors on the two drive components are arranged facing each other. One side of each drive motor has an output shaft parallel to its motor shaft. The output shaft and the motor shaft of the drive motor are power-coupled through a transmission component. The transmission component includes at least a planetary gear train, which is mounted on the output shaft and located between the two end faces of the drive motor.

[0007] Preferably, the transmission assembly includes an input gear fixed on the motor shaft of the drive motor, an output gear fixed on the output shaft, the output gear and the input gear being connected by an idler gear transmission, and the planetary gear system being disposed on one side of the output gear and having a hub thereon.

[0008] Preferably, the planetary gear train includes a planet carrier and planetary gears pivotally mounted thereon. A sun gear meshes with the inner side of each planetary gear and is fixed to the output shaft. A ring gear meshes with the outer side of each planetary gear and is fixed to the transmission. A hub is fixedly mounted on the other side of the planet carrier opposite to the planetary gears and is coaxial with the sun gear.

[0009] Preferably, the planetary gear train includes a planet carrier fixed to the transmission, planet gears pivotally mounted on the planet carrier, a sun gear meshing with the inner side of each planet gear, and the sun gear fixed to the output shaft; a gear ring meshing with the outer side of each planet gear, and a hub fixedly mounted on the other side of the gear ring opposite to the planet gear, the hub being coaxial with the sun 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, there is only one idler gear, which is located between and meshes with the input gear and the output gear.

[0012] Preferably, there are two idler gears arranged side by side, with the input gear and output gear located on both sides of the idler gears and meshing with them.

[0013] A dual-motor integrated drive system includes two independent drive components. Each drive component includes a drive motor disposed within a gearbox. The motor shafts of the drive motors on the two drive components are arranged in opposite directions. One side of each drive motor has an output shaft parallel to its motor shaft. The output shaft and the motor shaft of the drive motor are dynamically coupled through a transmission component. The transmission component includes at least a planetary gear train, which is disposed on the output shaft and located between the two end faces of the drive motor.

[0014] Preferably, the transmission assembly includes an input gear fixed on the motor shaft of the drive motor, an output gear on the planetary gear train, and an idler gear connecting the output gear and the input gear. A hub is fixed on the output shaft. The planetary gear train includes a planet carrier fixed on the output shaft and planet gears pivotally mounted on the planet carrier. A gear ring meshes with the outer side of each planet gear and is fixed on the transmission. A sun gear meshes with the inner side of each planet gear, and the sun gear is sleeved on the output shaft and fixedly connected to the output gear.

[0015] 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.

[0016] The beneficial effects of this utility model are mainly reflected in:

[0017] 1. The system features a compact structure and independent output for left and right wheels, enabling separate drive for each wheel, improving overall vehicle power generation, and achieving differentiated control of the left and right wheels. Furthermore, this system assembly eliminates the need for a complex differential structure, simplifying the powertrain structure, facilitating overall layout, and offering broad applicability.

[0018] 2. The transmission components adopt a planetary gear system structure, which enables the entire powertrain system to have a large transmission ratio, reducing the size and weight of the system assembly, making the layout more compact, with high load-bearing capacity and high transmission efficiency; at the same time, the multiple planetary gears in the planetary gear system are evenly distributed, so the load change during gear meshing is relatively small, and the entire system moves smoothly with low noise.

[0019] 3. Using two identical transmission components as power transmission parts reduces the number of parts, optimizes component design and manufacturing processes, reduces system complexity, improves reliability and production efficiency, and also helps to achieve vehicle lightweighting.

[0020] 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

[0021] The technical solution of this utility model will be further described below with reference to the accompanying drawings:

[0022] Figure 1 : A schematic diagram of the structure of the first preferred embodiment of this utility model;

[0023] Figure 2 : A schematic diagram of the structure of the second preferred embodiment of this utility model;

[0024] Figure 3 : A schematic diagram of the structure of the third preferred embodiment of this utility model;

[0025] Figure 4 : A schematic diagram of the structure of the fourth preferred embodiment of this utility model;

[0026] Figure 5: A schematic diagram of the structure of the fifth preferred embodiment of this utility model;

[0027] Figure 6 : A schematic diagram of the structure of the sixth preferred embodiment of this utility model. Detailed Implementation

[0028] 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.

[0029] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] like Figures 1 to 4 As shown, this utility model discloses a dual-motor integrated drive system, including two independent drive components. Each drive component includes a drive motor 1 housed within the gearbox. The motor shafts of the drive motors 1 on both drive components are arranged facing each other. In this utility model, the drive motors 1 can share a single motor housing, maximizing space savings and making it suitable for a wider range of vehicle models. The drive motor 1 described above is a high-speed DC motor, capable of matching the power and torque requirements of the entire vehicle. Of course, it could also be a flat motor, etc., all of which fall within the scope of this utility model and will not be elaborated upon here.

[0031] The drive motor 1 has an output shaft 2 parallel to its motor shaft on one side. The output shaft 2 and the motor shaft of the drive motor 1 are power-coupled through a transmission assembly. The transmission assembly includes at least a planetary gear train 3, which is mounted on the output shaft 2 and located between the two end faces of the drive motor 1. The transmission assembly includes an input gear 6 fixed on the motor shaft of the drive motor 1, and an output gear 5 fixed on the output shaft 2. The output gear 5 and the input gear 6 are connected by an idler gear 7. The planetary gear train 3 is located on one side of the output gear 5 and has a hub 4 on it. This structure is compact and features independent output for left and right wheels, enabling separate drive for the left and right wheels, improving the overall vehicle power output, and achieving differentiated control of the left and right wheels. Furthermore, this system assembly eliminates the need for a complex differential structure, simplifying the powertrain structure, facilitating overall layout, and offering broad applicability. The planetary gear train allows the system to have a large transmission ratio, significantly improving power performance, while also reducing system size and weight, resulting in a more compact layout and reduced space occupation.

[0032] In this preferred embodiment, there is only one idler gear 7, which is located between and meshes with the input gear 6 and the output gear 5. Alternatively, there may be two idler gears 7, arranged side-by-side, with the input gear 6 and the output gear 5 located on either side of the idler gear 7 and meshing with it. The above embodiments all fall within the protection scope of this utility model and will not be elaborated further here.

[0033] like Figure 1 As shown, in the first preferred embodiment of the present invention, the planetary gear train 3 includes a planet carrier 34 and planetary gears 33 pivotally mounted thereon. A sun gear 31 meshes with the inner side of the planetary gears 33 and is fixedly mounted on the output shaft 2. A gear ring 32 meshes with the planetary gears 33 and is fixedly mounted on the transmission. A hub 4 is fixedly mounted on the other side of the planet carrier 34 opposite to the planetary gears 33 and is coaxially mounted with the sun gear 31.

[0034] The working process of this embodiment is briefly described below:

[0035] When the drive motor 1 starts, it drives the output shaft 2 to rotate sequentially through the input gear 6, idler gear 7 and output gear 5. The rotation of the output shaft 2 drives the sun gear 31 to rotate. The rotation of the sun gear 31 can drive the planet carrier 34 to revolve relative to the sun gear 31 through the planet gear 33, thereby realizing the rotation of the hub 4.

[0036] like Figure 2 As shown, this is the second preferred embodiment of the present invention. Compared with the first preferred embodiment, an escape mechanism is added. 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. When the electric vehicle is driving in harsh conditions, the synchronizer can couple with the escape clutch sleeve, which can enhance the vehicle's torque, thereby improving traction and enabling the vehicle to escape in time, 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.

[0037] like Figure 3As shown, in the third preferred embodiment of this utility model, the planetary gear train 3 includes a planet carrier 34 fixed to the transmission. Planetary gears 33 are pivotally mounted on the planet carrier 34. A sun gear 31 meshes with the inner side of each planetary gear 33 and is fixed to the output shaft 2. A gear ring 32 meshes with the outer side of each planetary gear 33. A hub 4 is fixedly mounted on the opposite side of the gear ring 32 relative to the planetary gears 33, and the hub 4 is coaxially arranged with the sun gear 31.

[0038] The working process of this embodiment is briefly described below:

[0039] The output shaft 2 is driven to rotate sequentially through the input gear 6, idler gear 7 and output gear 5. The rotation of the output shaft 2 drives the sun gear 31 to rotate. The rotation of the sun gear 31 can drive the ring gear 32 to revolve relative to the sun gear 31 through the planet gear 33, thereby realizing the rotation of the hub 4.

[0040] like Figure 4 As shown, this is the fourth preferred embodiment of the present invention. Compared with the third preferred embodiment, an escape mechanism is added. 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. When the electric vehicle is driving in harsh conditions, the synchronizer can couple with the escape clutch sleeve, which can enhance the vehicle's torque, thereby improving traction and enabling the vehicle to escape in time, 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] like Figures 5 to 6As shown, this utility model discloses another dual-motor integrated drive system, including two independent drive components. Each drive component includes a drive motor 1 housed within the gearbox. The motor shafts of the drive motors 1 on the two drive components are arranged with their outputs facing away from each other. One side of each drive motor 1 has an output shaft 2 parallel to its motor shaft. The output shaft 2 and the motor shaft of the drive motor 1 are power-coupled via a transmission component. The transmission component includes at least a planetary gear train 3, which is mounted on the output shaft 2 and located between the two end faces of the drive motor 1. This structure is compact and features independent output for left and right wheels, enabling separate drive for each wheel, improving overall vehicle power generation, and achieving differentiated control of the left and right wheels. Furthermore, this system assembly eliminates the need for a complex differential structure, simplifying the powertrain structure, facilitating overall layout, and offering broad applicability. The planetary gear train allows the system to have a large transmission ratio, significantly improving power performance, while also reducing system size and weight, resulting in a more compact layout and reduced space occupation.

[0042] Specifically, the transmission assembly includes an input gear 6 fixed on the motor shaft of the drive motor 1, an output gear 5 on the planetary gear train 3, and an idler gear 7 connecting the output gear 5 and the input gear 6. A hub 4 is fixed on the output shaft 2. The planetary gear train 3 includes a planet carrier 34 fixed on the output shaft 2 and planet gears 33 pivotally mounted on the planet carrier 34. A gear ring 32 meshes with the outer side of the planet gear 33 and is fixed on the transmission. A sun gear 31 meshes with the inner side of the planet gear 33 and is sleeved on the output shaft 2 and fixedly connected to the output gear 5.

[0043] like Figure 5 As shown, this is the fifth preferred embodiment of the present invention. In this embodiment, the drive motor 1 starts and drives the output gear 5 to rotate sequentially through the input gear 6 and the idler gear 7. The rotation of the output gear 5 drives the sun gear 31, which is fixed to it, to rotate. The rotation of the sun gear 31 drives the planet carrier 34 to revolve through the planet gear 33, thereby driving the hub 4 to rotate and completing the power transmission.

[0044] like Figure 6As shown, this is the sixth preferred embodiment of the present invention. Compared with the fifth preferred embodiment, an escape mechanism is added. 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. When the electric vehicle is driving in harsh conditions, the synchronizer can couple with the escape clutch sleeve, which can enhance the vehicle's torque, thereby improving traction and enabling the vehicle to escape in time, 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.

[0045] 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.

[0046] 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 dual-motor integrated drive system, characterized in that: It includes two independent drive components, each of which includes a drive motor (1) installed in the gearbox. The motor shafts of the drive motors (1) on the two drive components are arranged to output towards each other. One side of the drive motor (1) is provided with an output shaft (2) parallel to its motor shaft. The output shaft (2) and the motor shaft of the drive motor (1) are coupled to each other through a transmission component. The transmission component includes at least a planetary gear train (3). The planetary gear train (3) is installed on the output shaft (2) and located between the two end faces of the drive motor (1).

2. The dual-motor integrated drive system according to claim 1, characterized in that: The transmission assembly includes an input gear (6) fixed on the motor shaft of the drive motor (1), an output gear (5) fixed on the output shaft (2), the output gear (5) and the input gear (6) being connected by an idler gear (7), and the planetary gear train (3) being located on one side of the output gear (5) and having a hub (4) thereon.

3. The dual-motor integrated drive system according to claim 2, characterized in that: The planetary gear train (3) includes a planet carrier (34) and planetary gears (33) pivotally mounted thereon. The inner side of the planetary gears (33) is provided with a sun gear (31) meshing with it. The sun gear (31) is fixed on the output shaft (2). The outer side of the planetary gears (33) is provided with a gear ring (32) meshing with it and fixed on the transmission. The hub (4) is fixedly mounted on the other side of the planet carrier (34) opposite to the planetary gears (33). The hub (4) and the sun gear (31) are coaxially arranged.

4. The dual-motor integrated drive system according to claim 2, characterized in that: The planetary gear train (3) includes a planet carrier (34) fixed on the transmission. A planetary gear (33) is pivotally mounted on the planet carrier (34). A sun gear (31) meshes with the inner side of the planetary gear (33). The sun gear (31) is fixed on the output shaft (2). A gear ring (32) meshes with the outer side of the planetary gear (33). A hub (4) is fixedly mounted on the other side of the gear ring (32) opposite to the planetary gear (33). The hub (4) and the sun gear (31) are coaxially mounted.

5. The dual-motor integrated drive system according to claim 3 or 4, characterized in that: One of the output shafts (2) is provided with a traction clutch sleeve (21), and the other output shaft (2) is provided with a synchronizer (22), which can be coupled to the traction clutch sleeve (21).

6. The dual-motor integrated drive system according to claim 4, characterized in that: There is only one idler gear (7), which is located between and meshes with the input gear (6) and the output gear (5).

7. The dual-motor integrated drive system according to claim 4, characterized in that: There are two idler wheels (7), which are arranged side by side. The input gear (6) and the output gear (5) are located on both sides of the idler wheel (7) and mesh with it.

8. A dual-motor integrated drive system, characterized in that: It includes two independent drive components, each of which includes a drive motor (1) installed in the gearbox. The motor shafts of the drive motors (1) on the two drive components are arranged opposite to each other. One side of the drive motor (1) is provided with an output shaft (2) parallel to its motor shaft. The output shaft (2) and the motor shaft of the drive motor (1) are coupled by a transmission component. The transmission component includes at least a planetary gear train (3), which is installed on the output shaft (2) and located between the two end faces of the drive motor (1).

9. The dual-motor integrated drive system according to claim 8, characterized in that: The transmission assembly includes an input gear (6) fixed on the motor shaft of the drive motor (1), an output gear (5) on the planetary gear train (3), and the output gear (5) and the input gear (6) are connected by an idler gear (7). A hub (4) is fixed on the output shaft (2). The planetary gear train (3) includes a planet carrier (34) fixed on the output shaft (2) and planet gears (33) pivotally mounted on the planet carrier (34). A gear ring (32) meshes with the outer side of the planet gear (33), and the gear ring (32) is fixed on the transmission. A sun gear (31) meshes with the inner side of the planet gear (33), and the sun gear (31) is sleeved on the output shaft (2) and fixedly connected to the output gear (5).

10. The dual-motor integrated drive system according to claim 9, characterized in that: One of the output shafts (2) is provided with a traction clutch sleeve (21), and the other output shaft (2) is provided with a synchronizer (22), which can be coupled to the traction clutch sleeve (21).

Images