CN213734595U - Pure electric drive system is arranged to bi-motor double row planet - Google Patents
Pure electric drive system is arranged to bi-motor double row planet Download PDFInfo
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- CN213734595U CN213734595U CN202022453808.9U CN202022453808U CN213734595U CN 213734595 U CN213734595 U CN 213734595U CN 202022453808 U CN202022453808 U CN 202022453808U CN 213734595 U CN213734595 U CN 213734595U
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Abstract
The utility model provides a pure electric drive system is arranged to bi-motor double row planet solves current drive arrangement and has the problem that drive power is not enough and can't satisfy multiple operating mode demands such as automobile starting, climbing, high-speed traveling simultaneously. The system is a pure electric vehicle transmission scheme, consists of two planetary gear trains and two motors, can realize the functions of independent or coupled driving of the two motors, braking energy recovery and the like, exerts the advantages of the motors, improves the driving efficiency, saves energy and has high efficiency.
Description
Technical Field
The utility model relates to an automobile power transmission field, concretely relates to pure electric drive system is arranged to bi-motor double row planet.
Background
The new energy automobile enters a rapid development stage, and the pure electric automobile is an important component of the new energy automobile and more represents the future development direction of the automobile industry. The single motor is limited by the characteristics of the motor, when the vehicle runs, the driving force is insufficient, the requirements of multiple working conditions such as starting, climbing and high-speed running of the vehicle cannot be met simultaneously, and the optimal driving effect cannot be achieved.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the problem that current drive arrangement has drive power not enough and can't satisfy multiple operating mode demands such as automobile start, climbing, high-speed traveling simultaneously, providing a pure electric drive system of bi-motor bi-planet row. The transmission scheme of the pure electric vehicle is composed of two planetary gear trains and two motors, can realize independent or coupled driving of the two motors, recovery of braking energy and other functions, exerts the advantages of the motors, improves the driving efficiency, saves energy and is efficient.
In order to achieve the above purpose, the technical scheme of the utility model is that:
a double-motor double-planet-row pure electric driving system comprises a first motor, a second motor, a first planet row, a second planet row, a transmission output shaft and a shell; the output shaft of the second motor is a hollow shaft, and the rated rotating speed of the first motor is greater than that of the second motor; the first planet row comprises a first sun gear, a first planet gear, a first outer gear ring and a first planet carrier; the first sun gear is connected with an output shaft of the first motor and used for inputting the driving force of the first motor; the first planet wheel is arranged on the first planet carrier, arranged along the circumferential direction of the first sun wheel, meshed with the first sun wheel and used for transmitting the power of the first sun wheel to the first planet carrier; the first outer gear ring is arranged on the shell, is positioned on the outer side of the first planet wheel and is meshed with the first planet wheel; the first planet carrier is connected with the transmission output shaft and outputs the power of the first motor; the second planet row comprises a second sun gear, a second planet gear, a second outer gear ring and a second planet carrier; the second sun gear is connected with an output shaft of the second motor and used for inputting the driving force of the second motor; the second planet gear is arranged on the second planet carrier, arranged along the circumferential direction of the second sun gear, meshed with the second sun gear and used for transmitting the power of the second sun gear to the second planet carrier; the second outer gear ring is arranged on the shell, is positioned on the outer side of the second planet wheel and is meshed with the second planet wheel; and the second planet carrier is fixedly connected with the transmission output shaft, and the transmission output shaft penetrates through an output shaft of the second motor to output the power of the second motor.
Furthermore, the output shaft of the first motor is a hollow shaft, and the transmission output shaft penetrates through the output shaft of the first motor, so that front and rear axle double driving is realized.
Further, the first sun gear is connected with an output shaft of the first motor through a spline.
Further, the output shaft of the first motor and the output shaft of the second motor are coaxially arranged.
Further, the second sun gear is connected with an output shaft of the second motor through a spline.
Further, the first planet carrier is connected with the transmission output shaft through a spline.
Further, the second planet carrier is connected with the transmission output shaft through a spline.
Further, the first motor, the second motor, the first planet row and the second planet row are all integrated in the shell.
Further, the shell is of an all-aluminum alloy structure.
Compared with the prior art, the utility model discloses technical scheme has following technological effect:
1. the utility model discloses in the pure electric drive system of two motor double planet row two motors match high-speed motor and low-speed motor respectively, high-speed motor has high rotational speed high-power characteristics, is applicable to the vehicle high speed and goes the drive; the low-speed motor has the characteristics of low rotating speed and large torque, is suitable for vehicle starting or low-speed running driving, and enables different motors to be in main working positions according to the running characteristics, so that the characteristics of each motor are fully exerted, and the transmission is efficient and energy-saving.
2. The utility model discloses two motors are connected respectively to double planet among the pure electric drive system of two motor double planet row, and at middle part coupling output, double planetary drive's speed ratio characteristic parameter K value is selected and is configured according to the motor characteristics, but full play height, low-speed motor characteristics, high-efficient drive.
3. The utility model discloses two motor double row's electricelectric actuating system adopt two motor drive, can effectively reduce motor overall dimension, compensate the not enough problem of single motor drive power simultaneously, and the coaxial arrangement of bi-motor simultaneously is alone or the coupling drive.
4. The utility model discloses among the pure electric drive system is arranged to two planets of bi-motor, when the vehicle brakies, can select single motor or bi-motor to carry out braking energy recovery according to braking energy size to furthest's recovered energy, the energy can be saved.
5. The utility model discloses among the pure electric drive system of two motor double row planets, when the output shaft of first motor also set up to the hollow shaft, power is exported simultaneously from the front portion, realizes the front and back axle dual drive.
6. The utility model discloses among the pure electric drive system of two motor double row planets, the design can integrate with the planetary gear transmission, also can divide the body design.
Drawings
Fig. 1 is a schematic diagram of a dual-motor dual-planet-row pure electric drive system of the present invention;
fig. 2 is the utility model discloses pure electric drive system schematic diagram two is arranged to two motor double row planets.
Reference numerals: 1-first electric machine, 2-housing, 3-second electric machine, 4-transmission output shaft, 11-first sun gear, 12-first planet gear, 13-first outer ring gear, 14-first planet carrier, 21-second sun gear, 22-second planet gear, 23-second outer ring gear, 24-second planet carrier.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and specific embodiments.
The utility model provides a pure electric drive system is arranged to bi-motor double row planet can realize single motor drive and bi-motor coupling drive to realize the high-efficient drive of whole speed of a motor within range of going. The driving system comprises two motors and two planetary rows, wherein the two planetary gear trains and the motors are configured in a differentiated manner, namely the two motors are arranged by matching high-speed motors and low-speed motors, and the corresponding planetary mechanisms select different speed ratio characteristic parameter K values according to the characteristics of the motors, so that the advantages of the motors are fully exerted, the driving is smoother and energy-saving, and the requirements of various working conditions such as large-torque starting, high-speed and high-power output and the like of a commercial vehicle are met; meanwhile, the double motors can recover braking energy independently or simultaneously, and energy recovery is realized to the maximum extent.
As shown in fig. 1, the dual-motor dual-planet-row pure electric drive system of the present invention comprises a first motor 1, a second motor 3, a first planet row, a second planet row, a transmission output shaft 4 and a housing 2; the output shaft of the first motor 1 and the output shaft of the second motor 3 are coaxially arranged, and the rated rotating speed of the first motor 1 is greater than that of the second motor 3; the first planetary row comprises a first sun gear 11, a first planet gear 12, a first outer ring gear 13 and a first planet carrier 14; the first sun gear 11 is connected with an output shaft of the first motor 1 and is used for inputting the driving force of the first motor 1; the first planetary gears 12 are mounted on the first carrier 14, arranged along the circumferential direction of the first sun gear 11, and meshed with the first sun gear 11, for transmitting the power of the first sun gear 11 to the first carrier 14; the first outer gear ring 13 is arranged on the shell 2, is positioned on the outer side of the first planet wheel 12 and is meshed with the first planet wheel 12; the first planet carrier 14 is connected with the transmission output shaft 4 and outputs the power of the first motor 1.
The second planetary row comprises a second sun gear 21, a second planet gear 22, a second external gear ring 23 and a second planet carrier 24; the second sun gear 21 is connected with an output shaft of the second motor 3 and is used for inputting the driving force of the second motor 3; the second planet gears 22 are mounted on a second planet carrier 24, arranged along the circumferential direction of the second sun gear 21, and meshed with the second sun gear 21, for transmitting the power of the second sun gear 21 to the second planet carrier 24; the second external gear ring 23 is arranged on the shell 2, is positioned outside the second planet wheels 22 and is meshed with the second planet wheels 22; the second planet carrier 24 is fixedly connected with the transmission output shaft 4, and the transmission output shaft 4 passes through the output shaft of the second motor 3 to output the power of the second motor 3.
As shown in fig. 2, in the system of the present invention, the main shaft of the first motor 1 is connected to the first sun gear 11, and the driving force of the first motor 1 is inputted; the main shaft of the second motor 3 is connected with the second sun gear 21, and the driving force of the second motor 3 is input; the first external gear ring 13 and the second external gear ring 23 are fixed on the housing 2, the first planet carrier 14, the second planet carrier 24 and the transmission output shaft 4 are connected, and the first planet wheel 12 and the second planet wheel 22 are respectively assembled on the first planet carrier 14 and the second planet carrier 24. The second motor 3 is made into a hollow shaft, and the transmission output shaft 4 passes through the hollow shaft of the second motor 3 to be output from the rear end, so as to output power to drive the vehicle. At this time, the output shaft of the first motor 1 can be set as a hollow shaft, and the transmission output shaft 4 passes through the output shaft of the first motor 1, so that front and rear axle dual drive is realized.
The utility model discloses in the system, first motor 1 is high-speed motor, and second motor 3 is the low-speed motor, and the velocity ratio K value that first planet row of rational design and second planet were arranged according to the driving needs for first motor 1 is suitable for the vehicle and traveles at a high speed, and second motor 3 works in vehicle low-speed state, and the high, low-speed motor's of full play characteristic reaches energy-conservingly high-efficiently. The speed ratio characteristic parameters K1/K2 of the first planet row and the second planet row are respectively equal to the gear number of the first outer gear ring to the gear number of the first sun gear and the gear number of the second outer gear ring to the gear number of the second sun gear, and the speed reduction and torque increase capacity of the planet rows is reflected.
In the embodiment of the present invention, the first sun gear 11 is connected to the output shaft of the first motor 1 through a spline. The second sun gear 21 is connected to the output shaft of the second motor 3 by a spline. The first carrier 14 is splined to the transmission output shaft 4. The second planet carrier 24 is splined to the transmission output shaft 4. The first motor 1, the second motor 3, the first planet row and the second planet row are all integrated in the shell 2. The housing 2 is of an all-aluminum alloy construction.
The working process of the double-motor double-planet-row pure electric drive system is described through the working mode as follows:
1) the single motor driving mode one: in this operating mode, the second motor 3 operates, the main shaft of the second motor 3 transmits power to the second sun gear 21, the second sun gear 21 is meshed with the second planet gear 22, the second planet gear 22 is simultaneously meshed with the second external gear ring 23, the second external gear ring 23 is fixed in the reducer housing 2, the power is output by the second planet carrier 24, and the second planet carrier 24 is connected with the transmission output shaft 4 to transmit the power to the transmission output shaft 4 for output. The second motor 3 is a low-speed motor and is characterized by low rated rotating speed and large output torque, so that the mode is suitable for low-speed driving stages of automobile starting, climbing and the like.
2) And a single-motor driving mode II: in the working mode, the first motor 1 works, a main shaft of the first motor 1 transmits power to the first sun gear 11, the first sun gear 11 is meshed with the first planet gear 12, the first planet gear 12 is simultaneously meshed with the first outer gear ring 13, the second outer gear ring 23 is fixed in the reducer shell 2, the power is output by the first planet carrier 14, and the first planet carrier 14 is connected with the transmission output shaft 4 to transmit the power to the transmission output shaft 4 for output. The first motor 1 is a high-speed motor and is characterized by high rated rotating speed and large output power, so that the mode is suitable for the middle and high-speed driving stage of the automobile, and has high output power and high transmission efficiency.
3) The first dual-motor driving mode comprises the following steps: in the road sections with heavier vehicle starting or steep gradient, the driving force of the second motor is insufficient, and the first motor participates in driving at the moment to play a role in assisting power.
4) A two-motor driving mode two: in the process of high-speed running of the vehicle, due to the change of road conditions or the change of load, the power of the drive of the second motor 3 is sometimes insufficient, and at the moment, the second motor 3 is driven to play a role in power compensation.
5) A braking energy recovery mode: the vehicle braking energy recovery is the reverse process of vehicle driving, namely, the vehicle inertia drives the transmission output shaft 4, the transmission output shaft 4 drives the planet wheels of each planet row, the planet wheels drive the sun wheel and then drive each motor, and the motors generate electricity to charge the storage battery, thereby realizing the energy recovery. The system can select the first motor 1 and the second motor 3 to respectively recover or simultaneously recover the braking energy according to the driving state and the braking energy, so that the optimal and maximum energy recovery is achieved, and the maximum energy-saving effect is realized.
Claims (9)
1. The utility model provides a pure electric drive system is arranged to bi-motor double row planet which characterized in that: comprises a first motor (1), a second motor (3), a first planet row, a second planet row, a transmission output shaft (4) and a shell (2);
the output shaft of the second motor (3) is a hollow shaft, and the rated rotating speed of the first motor (1) is greater than that of the second motor (3);
the first planet row comprises a first sun gear (11), a first planet gear (12), a first outer gear ring (13) and a first planet carrier (14); the first sun gear (11) is connected with an output shaft of the first motor (1) and is used for inputting the driving force of the first motor (1); the first planet wheel (12) is arranged on the first planet carrier (14), arranged along the circumferential direction of the first sun wheel (11), meshed with the first sun wheel (11) and used for transmitting the power of the first sun wheel (11) to the first planet carrier (14); the first outer gear ring (13) is arranged on the shell (2), is positioned on the outer side of the first planet wheel (12) and is meshed with the first planet wheel (12); the first planet carrier (14) is connected with the transmission output shaft (4) and outputs the power of the first motor (1);
the second planet row comprises a second sun gear (21), a second planet gear (22), a second external gear ring (23) and a second planet carrier (24); the second sun gear (21) is connected with an output shaft of the second motor (3) and is used for inputting the driving force of the second motor (3); the second planet wheels (22) are arranged on a second planet carrier (24), arranged along the circumferential direction of the second sun wheel (21) and meshed with the second sun wheel (21) for transmitting the power of the second sun wheel (21) to the second planet carrier (24); the second external gear ring (23) is arranged on the shell (2), is positioned outside the second planet wheel (22) and is meshed with the second planet wheel (22); the second planet carrier (24) is fixedly connected with the transmission output shaft (4), and the transmission output shaft (4) penetrates through the output shaft of the second motor (3) to output the power of the second motor (3).
2. The dual-motor dual-planet-row pure electric drive system of claim 1, characterized in that: the output shaft of the first motor (1) is a hollow shaft, and the transmission output shaft (4) penetrates through the output shaft of the first motor (1) to realize front and rear axle double drive.
3. The dual-motor dual-planet-row pure electric drive system of claim 2, characterized in that: the first sun gear (11) is connected with an output shaft of the first motor (1) through a spline.
4. The dual-motor dual-planet-row pure electric drive system of claim 1, 2 or 3, characterized in that: the output shaft of the first motor (1) and the output shaft of the second motor (3) are coaxially arranged.
5. The dual-motor dual-planet-row pure electric drive system of claim 4, characterized in that: the second sun gear (21) is connected with an output shaft of the second motor (3) through a spline.
6. The dual-motor dual-planet-row pure electric drive system of claim 5, characterized in that: the first planet carrier (14) is connected with the transmission output shaft (4) through a spline.
7. The dual-motor dual-planet-row pure electric drive system of claim 6, characterized in that: the second planet carrier (24) is connected with the transmission output shaft (4) through a spline.
8. The dual-motor dual-planet-row pure electric drive system of claim 7, characterized in that: the first motor (1), the second motor (3), the first planet row and the second planet row are all integrated in the shell (2).
9. The dual-motor dual-planet-row pure electric drive system of claim 8, characterized in that: the shell (2) is of an all-aluminum alloy structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022453808.9U CN213734595U (en) | 2020-10-29 | 2020-10-29 | Pure electric drive system is arranged to bi-motor double row planet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022453808.9U CN213734595U (en) | 2020-10-29 | 2020-10-29 | Pure electric drive system is arranged to bi-motor double row planet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213734595U true CN213734595U (en) | 2021-07-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022453808.9U Active CN213734595U (en) | 2020-10-29 | 2020-10-29 | Pure electric drive system is arranged to bi-motor double row planet |
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| Country | Link |
|---|---|
| CN (1) | CN213734595U (en) |
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2020
- 2020-10-29 CN CN202022453808.9U patent/CN213734595U/en active Active
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