CN219406139U - Electric drive system, power system of electric automobile and electric automobile - Google Patents
Electric drive system, power system of electric automobile and electric automobile Download PDFInfo
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- CN219406139U CN219406139U CN202320048940.2U CN202320048940U CN219406139U CN 219406139 U CN219406139 U CN 219406139U CN 202320048940 U CN202320048940 U CN 202320048940U CN 219406139 U CN219406139 U CN 219406139U
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Abstract
The utility model discloses an electric drive system, a power system of an electric automobile and the electric automobile, wherein the electric drive system comprises a shell, two drive motors and two reducers, the two drive motors are arranged on the shell, the two drive motors are provided with motor output shafts, the two motor output shafts are coaxially arranged, the two reducers are arranged on the shell, the two reducers are arranged at intervals and are symmetrically arranged outside the two drive motors, each reducer comprises a first planet row and a second planet row, the first planet row is in transmission connection with one drive motor, the second planet row is sleeved with the first planet row and is in transmission connection with the first planet row, and the output end of the second planet row is in transmission connection with one side wheel.
Description
Technical Field
The utility model relates to the technical field of electric automobiles, in particular to an electric driving system, a power system of an electric automobile and the electric automobile.
Background
At present, with the rapid development of the field of new energy automobiles, the electric automobile has become a development trend, and the mass of the pure electric automobile sold in the current market is far higher than that of the traditional fuel automobile because the electric automobile needs a larger battery to increase the endurance mileage. Under the trend of increasing sales of electric automobiles, the development of light weight of the electric automobiles is imperative, and the importance of the electric automobiles on the reduction of various parts in the automobiles is higher and higher. While most of current electric automobile transmission designs are in parallel shaft layout, and meanwhile, a traditional bevel gear differential is used for power output. The traditional bevel gear differential mechanism is large in axial size, and poor in front and rear drive arrangement, so that the overall size and the mass are large, and the development trend of the light weight of the electric automobile cannot be met.
Disclosure of Invention
The utility model mainly aims to provide an electric drive system, which aims to solve the problems of large arrangement space and poor adaptability of the electric drive system.
To achieve the above object, the present utility model provides an electric drive system including:
a housing;
the two driving motors are arranged on the shell and are provided with motor output shafts, and the motor output shafts are coaxially arranged; the method comprises the steps of,
the two speed reducers are arranged on the shell, are spaced and are symmetrically arranged on the outer sides of the two driving motors in a structural mode;
each speed reducer comprises a first planet row and a second planet row, the first planet row is in transmission connection with one driving motor, the second planet row is sleeved with the first planet row and in transmission connection with the first planet row, and the output end of the second planet row is used for being in transmission connection with one side wheel.
Optionally, the first planet row comprises a first sun gear, a first planet wheel and a first gear ring which are meshed in sequence, the first sun gear is fixedly connected with the motor output shaft, and the first planet wheel is provided with a first planet carrier;
the second planet row comprises a second sun gear, a second planet wheel and a second gear ring which are meshed in sequence, the second sun gear is fixedly sleeved on the outer side of the first planet carrier, the second planet wheel is provided with a second planet carrier, and the output end of the second planet carrier is used for driving and connecting one side of the wheel.
Optionally, the first gear ring is located outside that the first planet wheel is far away from the first sun gear, and is fixedly connected with the casing.
Optionally, the second gear ring is located outside that the second planet wheel kept away from the second sun gear, and with casing fixed connection.
Optionally, the first planet wheels are provided with a plurality of groups along the circumferential direction of the first sun wheel; and/or the number of the groups of groups,
the second planet gears are provided with a plurality of groups along the circumferential direction of the second sun gear.
Optionally, the driving motor comprises a stator fixedly connected with the shell and a rotor rotatably connected with the stator, and the rotor is in transmission connection with the motor output shaft.
Optionally, the electric drive system further comprises a motor controller, and the motor controller is connected with the two drive motors.
Optionally, the electric driving system further comprises an electronic oil pump, an oil storage cavity, an oil pipe and an oil cooler are arranged in the shell corresponding to the driving motor, and the electronic oil pump, the oil storage cavity, the oil pipe and the oil cooler form a cooling circulation.
The utility model also provides a power system of the electric automobile, which comprises the electric driving system.
The utility model further provides an electric automobile, which comprises the power system of the electric automobile.
According to the technical scheme, the electric driving system releases mechanical coupling of the wheels at two sides through the two driving motors and the two speed reducers which are arranged independently, realizes independent driving of the wheels at two sides, and replaces a complex differential mechanism through speed regulation of the two driving motors respectively, so that the structure of a power system is simplified, the weight of the whole vehicle is reduced, and the power performance of the whole vehicle is improved. The first planetary row and the second planetary row are connected through transmission, the speed reduction function is realized, the second planetary row is sleeved with the first planetary row, the axial distance is shortened, the whole structure is more compact, the problems that the axial distance of the traditional parallel shaft is large and the arrangement is not good are solved, the structural bearing requirement is small, and the efficiency is improved.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of an embodiment of an electric drive system according to the present utility model.
Reference numerals illustrate:
| reference numerals | Name of the name | Reference numerals | Name of the name |
| 100 | Electric drive system | 312 | First planetary gear |
| 1 | Shell body | 313 | First gear ring |
| 2 | Driving motor | 314 | First planet carrier |
| 21 | Motor output shaft | 32 | Second planetary gear set |
| 22 | Stator | 321 | Second sun gear |
| 23 | Rotor | 322 | Second planetary gear |
| 3 | Speed reducer | 323 | Second gear ring |
| 31 | First planet row | 324 | Second planet carrier |
| 311 | First sun gear |
The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.
At present, with the rapid development of the field of new energy automobiles, the electric automobile has become a development trend, and the mass of the pure electric automobile sold in the current market is far higher than that of the traditional fuel automobile because the electric automobile needs a larger battery to increase the endurance mileage. Under the trend of increasing sales of electric automobiles, the development of light weight of the electric automobiles is imperative, and the importance of the electric automobiles on the reduction of various parts in the automobiles is higher and higher. While most of current electric automobile transmission designs are in parallel shaft layout, and meanwhile, a traditional bevel gear differential is used for power output. The traditional bevel gear differential mechanism is large in axial size, and poor in front and rear drive arrangement, so that the overall size and the mass are large, and the development trend of the light weight of the electric automobile cannot be met.
In view of this, the present utility model proposes an electric drive system 100, fig. 1 is an embodiment of the electric drive system 100 provided by the present utility model, the axial distance is shortened, the overall structure is more compact, the problems of large axial distance and poor arrangement of the conventional parallel shafts are solved, the structural load requirement is small, and the efficiency is improved, and the electric drive system 100 will be described with reference to the specific drawings.
Referring to fig. 1, the electric driving system 100 includes a housing 1, two driving motors 2 and two reducers 3, wherein the two driving motors 2 are disposed on the housing 1, the two driving motors 2 have motor output shafts 21, the two motor output shafts 21 are coaxially disposed, the two reducers 3 are disposed on the housing 1, the two reducers 3 are disposed at intervals and are structurally symmetrical on the outer sides of the two driving motors 2, each reducer 3 includes a first planet row 31 and a second planet row 32, the first planet row 31 is in transmission connection with the driving motor 2, the second planet row 32 is sleeved with the first planet row 31 and is in transmission connection with the first planet row 31, and an output end of the second planet row 32 is used for being in transmission connection with one side wheel.
In the technical scheme of the utility model, the electric driving system 100 releases the mechanical coupling of the wheels at both sides through the two driving motors 2 and the two reducers 3 which are independently arranged, realizes the independent driving of the wheels at both sides, and replaces a complex differential mechanism through the respective speed regulation of the two driving motors 2, thereby simplifying the structure of a power system, reducing the weight of the whole vehicle and improving the power performance of the whole vehicle. The first planet row 31 and the second planet row 32 are connected through transmission, the first planet row 31 is sleeved on the second planet row 32, the axial distance is shortened, the whole structure is more compact, the problems that the axial distance of a traditional parallel shaft is large and the arrangement is not good are solved, the structural bearing requirement is small, and the efficiency is improved.
Specifically, the first planetary gear set 31 includes a first sun gear 311, a first planet gear 312, and a first ring gear 313 that are sequentially meshed, where the first sun gear 311 is fixedly connected to the motor output shaft 21, and the specific connection manner is not limited, and in an embodiment, the motor output shaft 21 may be connected to the first sun gear 311 through a spline. The first planetary gear 312 is provided with a first planetary carrier 314, the second planetary row 32 comprises a second sun gear 321, a second planetary gear 322 and a second gear ring 323 which are sequentially meshed, the second sun gear 321 is fixedly sleeved on the outer side of the first planetary carrier 314, the second planetary gear 322 is provided with a second planetary carrier 324, and the output end of the second planetary carrier 324 is used for driving and connecting one side of the wheels. The first sun gear 311 is driven to rotate by the motor output shaft 21, the first planet gear 312 is meshed with the first sun gear 311 to drive the first planet carrier 314, and the second sun gear 321 is fixedly connected to the outer side of the first planet carrier 314, so that the output rotation speed of the driving motor 2 is transmitted to the second sun gear 321 after being decelerated by the first planet row 31 by the motor output shaft 21. The second sun gear 321 is meshed with the second planet gear 322 to drive the second planet carrier 324 arranged on the second planet gear 322, and the output end of the second planet carrier 324 is used for driving one side of the wheel, so that the output rotation speed of the driving motor 2 is reduced once through the first planet row 31 and then is reduced twice through the second planet row 32 to be transmitted to the wheel, and a speed reduction effect is achieved.
In order to improve the structural strength of the two reducers 3, the first gear ring 313 is located at the outer side of the first planet gear 312 away from the first sun gear 311 and is fixedly connected with the housing 1, and the first planet gear 312 is fixed by the first gear ring 313, so that positioning and supporting are provided for the first planet row 31, and the structural strength is improved. Similarly, the second ring gear 323 is located at the outer side of the second planetary gear 322 away from the second sun gear 321, and is fixedly connected with the housing 1, so as to provide positioning and support for the first planetary gear row 31, thereby improving structural strength. It should be noted that, in the arrangement of the first ring gear 313 and the second ring gear 323, the first ring gear 313 and the second ring gear 323 may alternatively exist or may also exist simultaneously, and it is obvious that the technical effect brought by the simultaneous existence is the best. The first ring gear 313 and/or the second ring gear 323 are fixedly connected to the housing 1 in various manners, in an embodiment, spline connection may be used to ensure stability and reliability of connection, and in another embodiment, rectangular tooth connection may be used, which is not particularly limited.
The first sun gear 311 is located at the center of the first planet row 31, the outer ring of the first sun gear 311 is meshed with the first planet gears 312, and in the circumferential direction of the first sun gear 311, multiple groups of first planet gears 312 may be provided, and the specific number is not limited. Similarly, the second sun gear 321 is fixedly sleeved on the outer side of the first planet carrier 314, and in the circumferential direction of the second sun gear 321, multiple groups of second planet gears 322 may be disposed, and the specific number is not limited.
The driving motor 2 is used as a power source of the electric driving system 100, specifically, the driving motor 2 includes a stator 22 fixedly connected to the housing 1 and a rotor 23 rotatably connected to the stator 22, and the rotor 23 is in transmission connection with the motor output shaft 21 to output torque to the first planetary gear set 31 and then to the second planetary gear set 32 for driving the wheels.
In order to realize the electronic differential function, the electric drive system 100 further includes a motor controller, where the motor controller is connected to the two driving motors 2, and the motor controller can control the two driving motors 2 simultaneously, or can control one driving motor 2 separately, and regulate speed and torque to realize the electronic differential function. The two driving motors 2 are controlled by the motor controller, so that the central distributed driving control of the wheels on two sides is completed, the operation stability is higher, and the single-side slipping is effectively prevented.
The electric drive system 100 further comprises an electronic oil pump, an oil storage cavity, an oil pipe and an oil cooler are arranged in the shell 1 corresponding to the drive motor 2, the electronic oil pump, the oil storage cavity, the oil pipe and the oil cooler form a cooling cycle, and peak performance of the two drive motors 2 is improved.
The utility model also provides a power system of an electric automobile, which comprises the electric drive system 100, and the specific structure of the electric drive system 100 refers to the above embodiment, and because the power system of the electric automobile adopts all the technical schemes of all the embodiments, the power system of the electric automobile at least has all the beneficial effects brought by the technical schemes of the embodiments, and the description is omitted herein.
In the present utility model, the specific structure of the power system of the electric vehicle is not limited.
The utility model also provides an electric automobile, which comprises the power system of the electric automobile, and the specific structure of the power system of the electric automobile refers to the embodiment, and because the electric automobile adopts all the technical schemes of all the embodiments, the electric automobile at least has all the beneficial effects brought by the technical schemes of the embodiments, and the specific structure of the power system of the electric automobile is not repeated here.
In the present utility model, the specific structure of the electric vehicle is not limited.
The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the description of the present utility model and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the utility model.
Claims (10)
1. An electric drive system, comprising:
a housing;
the two driving motors are arranged on the shell and are provided with motor output shafts, and the motor output shafts are coaxially arranged; the method comprises the steps of,
the two speed reducers are arranged on the shell, are spaced and are symmetrically arranged on the outer sides of the two driving motors in a structural mode;
each speed reducer comprises a first planet row and a second planet row, the first planet row is in transmission connection with one driving motor, the second planet row is sleeved with the first planet row and in transmission connection with the first planet row, and the output end of the second planet row is used for being in transmission connection with one side wheel.
2. The electric drive system of claim 1, wherein the first row of planet gears includes a first sun gear, a first planet gear, and a first ring gear that are sequentially meshed, the first sun gear being fixedly connected to the motor output shaft, the first planet gear being provided with a first carrier;
the second planet row comprises a second sun gear, a second planet wheel and a second gear ring which are meshed in sequence, the second sun gear is fixedly sleeved on the outer side of the first planet carrier, the second planet wheel is provided with a second planet carrier, and the output end of the second planet carrier is used for driving and connecting one side of the wheel.
3. The electric drive system of claim 2, wherein the first ring gear is located outside of the first planet gear away from the first sun gear and is fixedly connected to the housing.
4. The electric drive system of claim 2, wherein the second ring gear is located outside of the second planet gear away from the second sun gear and is fixedly connected to the housing.
5. The electric drive system of claim 2, wherein the first planet is provided with a plurality of groups along a circumference of the first sun; and/or the number of the groups of groups,
the second planet gears are provided with a plurality of groups along the circumferential direction of the second sun gear.
6. The electric drive system of claim 2 wherein said drive motor includes a stator fixedly coupled to said housing and a rotor rotatably coupled to said stator, said rotor drivingly coupled to said motor output shaft.
7. The electric drive system of claim 1, further comprising a motor controller, the motor controller connecting the two drive motors.
8. The electric drive system of claim 1, further comprising an electronic oil pump, wherein an oil storage chamber, an oil pipe, and an oil cooler are disposed within the housing corresponding to the drive motor, wherein the electronic oil pump, the oil storage chamber, the oil pipe, and the oil cooler form a cooling cycle.
9. A power system of an electric vehicle, characterized by comprising an electric drive system according to any one of claims 1 to 8.
10. An electric vehicle comprising the power system of the electric vehicle as claimed in claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320048940.2U CN219406139U (en) | 2023-01-09 | 2023-01-09 | Electric drive system, power system of electric automobile and electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320048940.2U CN219406139U (en) | 2023-01-09 | 2023-01-09 | Electric drive system, power system of electric automobile and electric automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219406139U true CN219406139U (en) | 2023-07-25 |
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ID=87234264
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320048940.2U Active CN219406139U (en) | 2023-01-09 | 2023-01-09 | Electric drive system, power system of electric automobile and electric automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219406139U (en) |
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2023
- 2023-01-09 CN CN202320048940.2U patent/CN219406139U/en active Active
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