CN114435124A - Dual-motor multi-mode driving system based on planetary gear - Google Patents
Dual-motor multi-mode driving system based on planetary gear Download PDFInfo
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- CN114435124A CN114435124A CN202210108664.4A CN202210108664A CN114435124A CN 114435124 A CN114435124 A CN 114435124A CN 202210108664 A CN202210108664 A CN 202210108664A CN 114435124 A CN114435124 A CN 114435124A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K17/00—Arrangement or mounting of transmissions in vehicles
- B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
- B60K17/06—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of change-speed gearing
- B60K17/08—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of change-speed gearing of mechanical type
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K17/00—Arrangement or mounting of transmissions in vehicles
- B60K17/02—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of clutch
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
- B60L15/32—Control or regulation of multiple-unit electrically-propelled vehicles
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Power Engineering (AREA)
- Structure Of Transmissions (AREA)
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Abstract
The invention relates to a double-motor multi-mode driving system based on a planetary gear, which comprises a driving motor I, an input shaft I, a driving motor II, an output shaft II, a double-row single-sun-wheel planetary gear mechanism, a brake I, a brake II, a gear train shell and a transmission mechanism, wherein the driving motor I is connected with the input shaft I; the driving motor I is connected to a sun gear of the double-row single-sun-gear planetary gear mechanism through an input shaft I; the driving motor II is connected to a gear ring of the double-row single-sun-wheel planetary gear mechanism through an input shaft II; the brake I works to brake a large planet carrier of the double-row single-sun-wheel planetary gear mechanism, and the brake II works to brake a gear ring of the double-row single-sun-wheel planetary gear mechanism; the small planet carrier of the double-row single-sun-wheel planetary gear mechanism is used as an output component of the mechanism to be connected with the transmission mechanism, and the output power drives the automobile. The system can realize five driving modes, so that the automobile has multiple driving modes to be selected in the driving process, and different driving requirements are met.
Description
Technical Field
The invention relates to the technical field of new energy automobiles, in particular to a double-motor multi-mode driving system based on a planetary gear.
Background
The automobile industry has rapidly developed in recent years, and great convenience is brought to the life of people. With the increasing demands of people on the dynamic property, economy and comfort of automobiles, the increasing shortage of petroleum resources and the increasingly severe natural environment, the nation starts to support the research, development and use of electric automobiles. The electric automobile is clean, environment-friendly and comfortable to drive, and is a good scheme for solving the marketing problem. However, the current electric automobile still has the problems of limited battery capacity, short endurance time and the like.
The double-motor drive has multiple working modes through the mutual matching of the two driving motors and the brake, different driving modes can be selected under different road conditions, the optimal working mode is selected, and the economy of the automobile is improved on the premise of ensuring the dynamic property of the automobile, so that the use efficiency of energy is improved. Therefore, the dual-motor driving system will become a key research and development direction in the field of new energy automobiles.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide a planetary gear set coupling driving system with dual motors, which is to improve the efficiency of power utilization through multiple operating modes to improve the economy of an automobile on the premise of ensuring the dynamic performance of the automobile. The invention improves the single motor driving system into a double-motor structure, matches with a planetary gear mechanism, and provides a plurality of driving modes through the matching with a brake.
The technical scheme adopted by the invention is as follows:
the invention provides a double-motor multi-mode driving system based on a planetary gear, which comprises a driving motor I, an input shaft I, a driving motor II, an input shaft II, a double-row single-sun-wheel planetary gear mechanism, a brake I, a brake II and a transmission mechanism, wherein the driving motor I is connected with the input shaft I;
the double-row single-sun-wheel planetary gear mechanism comprises a large sun wheel, a gear ring, an inner planetary gear, a large planet carrier, a small sun wheel, an outer planetary gear and a small planet carrier; the large sun wheel and the small sun wheel are sequentially arranged in parallel; the inner planetary gear is meshed and connected with the outer side of the circumference of the large sun gear; the large planet carrier is arranged on one side of the inner planet gear; the outer planetary gear is meshed and connected with the outer side of the circumference of the small sun gear; the small planet carrier is arranged on one side of the outer planet gear; the gear ring is arranged on the outer sides of the inner planetary gear and the outer planetary gear and is respectively meshed with the inner planetary gear and the outer planetary gear;
the driving motor I is connected with the gear ring through the input shaft I; the driving motor II is sequentially connected with the large planet carrier, the large sun gear and the small sun gear through the input shaft II; one side of the brake I is connected with the large planet carrier and used for braking the large planet carrier; one side of the brake II is connected with the gear ring and used for braking the gear ring; the transmission mechanism is arranged at the output end of the small planet carrier; and the torques of the driving motor I and the driving motor II are output to the power transmission mechanism through the small planet carrier.
Further, the power transmission mechanism comprises a main speed reducer input gear, a main speed reducer output gear and a differential mechanism; the input gear of the main speed reducer is meshed with the output end of the small planet carrier; and the output gear of the main speed reducer is meshed with the input gear of the main speed reducer, power is transmitted to the differential mechanism, and finally the power is transmitted to the wheels to drive the automobile to run.
Furthermore, the large sun gear and the small sun gear are coaxially connected with the input shaft II, namely, the large sun gear and the small sun gear share the same input shaft, and the rotating axes are superposed on a straight line.
Further, the outside of double single sun gear planetary gear mechanism is provided with the train casing, stopper I, stopper II, final drive input gear and final drive output gear all are located inside the train casing.
Further, the driving system comprises five driving modes, namely a driving motor I driving mode, a driving motor II driving mode I, a driving motor II driving mode II, a double-motor torque coupling mode and a double-motor rotating speed coupling mode; wherein
Drive motor I drive mode: the driving motor I works to provide torque for a driving system, the brake I brakes the large planet carrier, and the driving motor II and the brake II do not work;
the driving mode I of the driving motor II is as follows: the driving motor II works to provide torque for a driving system, the brake I brakes the large planet carrier, and the driving motor I and the brake II do not work;
and driving a second driving mode of the driving motor II: the driving motor II works to provide torque for a driving system, the brake II brakes the gear ring, and the driving motor I and the brake I do not work;
dual motor torque coupling mode: the driving motor I and the driving motor II work simultaneously to provide torque for a driving system together, the brake I brakes the large planet carrier, and the brake II does not work;
double-motor rotating speed coupling mode: the driving motors I and II work simultaneously to provide torque for a driving system, and the brake I and the brake II do not work.
Compared with the prior art, the invention has the following beneficial effects:
the pure electric vehicle has excellent performance at medium and low speeds, is quiet, economical and performance, but has low cost performance when reaching high speed, and the electric quantity consumption speed of the pure electric vehicle is multiplied by the increase of resistance.
Drawings
FIG. 1 is a schematic structural diagram of a planetary gear-based dual-motor multi-mode driving system;
FIG. 2 is a power transmission diagram of the driving mode of the driving motor I of the invention;
FIG. 3 is a power transmission diagram of the first driving mode of the driving motor II according to the present invention;
FIG. 4 is a power transmission diagram of a second driving mode of the driving motor II according to the present invention;
fig. 5 is a power transmission diagram of a dual motor driving mode of the present invention.
Wherein, the reference numbers: 1-driving a motor II; 2-input shaft II; 3-driving a motor I; 4-input shaft I; 5-a gear ring; 6-inner planetary gear; 7-outer planetary gear; 8-small planet carrier; 9-main reducer input gear; 10-a differential; 11-main reducer output gear; 12-large sun gear; 13-brake II; 14-large planet carrier; 15-brake I; 16-a small sun gear; 17-train housing.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
It should be noted that in the description of the present invention, the terms "upper", "lower", "top", "bottom", "one side", "the other side", "left", "right", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not mean that a device or an element must have a specific orientation, be configured and operated in a specific orientation.
Referring to fig. 1 to 4, a specific structure of an embodiment of a planetary gear based dual-motor multi-mode driving system is shown. The driving system comprises a driving motor II 1, an input shaft II 2, a driving motor I3, an input shaft I4, a double-row single-sun-wheel planetary gear mechanism, a brake II 13, a brake I15 and a transmission mechanism.
The double-row single-sun-wheel planetary gear mechanism comprises a gear ring 5, an inner planetary gear 6, an outer planetary gear 7, a small planet carrier 8, a large sun wheel 12, a large planet carrier 14 and a small sun wheel 16; the large sun wheel and the small sun wheel are sequentially arranged in parallel; the inner planetary gear 6 is meshed and connected with the outer side of the circumference of the large sun gear 12; the large planet carrier 14 is connected to the left side of the inner planet gear 6; the outer planetary gear 7 is meshed and connected with the outer side of the circumference of the small sun gear 16; the small planet carrier 8 is connected to the right side of the outer planet gear 7; the gear ring 5 is arranged on the outer sides of the inner planet gears 6 and the outer planet gears 6 and is in meshed connection with the inner planet gears 6 and the outer planet gears 7 respectively.
The driving motor II 1 is sequentially and coaxially connected with the large planet carrier 14, the large sun gear 12 and the small sun gear 16 through the input shaft II 2, namely the large planet carrier 14, the large sun gear 12 and the small sun gear 16 share the same input shaft, and the rotating axes are superposed on the same straight line; the driving motor I3 is coaxially connected with the gear ring 5 through an input shaft I4; a gear train shell 17 is arranged outside the double-row single-sun-wheel planetary gear mechanism; the brake I15 is positioned in the gear train shell 17, one side of the brake I is connected with the gear train shell 17, and the other side of the brake I is connected with the large planet carrier 14 and used for braking the large planet carrier 14; the brake II is positioned in the gear train shell 17, one side of the brake II is connected with the gear train shell 17, and the other side of the brake II is connected with the gear ring 5 and used for braking the gear ring 5; the transmission mechanism is connected with the output end of the small planet carrier 8; and the torques of the driving motor I3 and the driving motor II 1 are output to the power transmission mechanism through the small planet carrier 8.
The power transmission mechanism comprises a main speed reducer input gear 9, a main speed reducer output gear 11 and a differential 10; the input gear 9 of the main speed reducer is connected with the output end of the small planet carrier 8; the main reducer output gear 11 is meshed with the main reducer input gear 9; and the input gear 9 and the output gear 11 of the main reducer are both positioned in the gear train shell 17; the differential 10 is connected with a main reducer output gear 11, and power is transmitted to the differential 10, then input to a half shaft, and finally transmitted to wheels to drive the automobile to run. And the driving mode of the automobile is decided and switched according to the driving requirement of the automobile through the whole automobile controller.
The driving system comprises five driving modes, namely a driving motor I driving mode, a driving motor II driving mode I, a driving motor II driving mode II, a double-motor torque coupling mode and a double-motor rotating speed coupling mode; wherein
When the system is in a driving mode of the driving motor I3, as shown in FIG. 2, when the system is in the driving mode, the driving motor I3 and the brake I15 work, the driving motor I3 provides driving force, and the brake I15 moves the planet carrier 14. At the moment, power is input into the gear ring 5 through the input shaft I4 by the driving motor I3, and after passing through the planetary gear mechanism, the small planet carrier 8 outputs the power to the input gear 9 of the main speed reducer, and the power is finally output by the output gear 11 of the main speed reducer. Meanwhile, a driving force may be input to the driving motor ii 1 to be reversely rotated.
When the system is in the driving mode one of the driving motors II 1, as shown in FIG. 3. When the driving mode is adopted, the driving motor II 1 and the brake I15 are operated, and the brake II 13 is not operated. The driving motor II 1 provides driving force, and the brake I15 moves the planet carrier 14. At the moment, power is input to the sun gear 12 through the input shaft II 2 by the driving motor II 1, and after passing through the planetary gear mechanism, the small planet carrier 8 outputs the power to the main speed reducer input gear 9, and finally the power is output by the main speed reducer output gear 11. Meanwhile, a driving force may be input to the driving motor i 3 to be reversely rotated.
When the system is in the second driving mode of the driving motor II, as shown in FIG. 4. When the motor is in the mode, the driving motor II 1 and the brake II 13 work, and the brake I15 does not work. The driving motor II 1 provides driving force, and the brake II 13 moves the gear ring 5. At this time, power is input to the large sun gear 12 and the small sun gear 16 through the input shaft ii 2 by the driving motor ii 1, passes through the planetary gear mechanism, and is output to the main reducer input gear 9 by the small carrier 8, and is finally output by the main reducer output gear 11. Since the brake II brakes the ring gear 5, the driving motor I3 does not rotate reversely at this time.
When the system is in the dual-motor torque coupling mode, as shown in fig. 5, in the driving mode, the driving motor I3 and the driving motor II 1 work, the brake I15 works, and the brake II 13 does not work. The driving motor I3 and the moving motor II 1 provide driving force, and the brake I15 moves the large planet carrier 14. At the moment, power is input to the sun gear 12 through the input shaft I4 and the input shaft II 2 by the driving motor II 1, and after passing through the planetary gear mechanism, the small planet carrier 8 outputs the power to the input gear 9 of the main speed reducer, and finally the power is output by the output gear 11 of the main speed reducer.
When the system is in a double-motor speed coupling mode, the driving motor I3 and the driving motor II 1 work, the brake I15 does not work, the brake II 13 does not work, the two modes only consist in whether the brake I15 works or not, and the rest modes are completely the same.
The invention adopts the double-motor driving planetary gear mechanism, takes the power performance of the automobile as the premise, and can jointly switch among a plurality of modes through the joint matching of the driving motor and the brake so as to adapt to different driving requirements and improve the utilization rate of energy.
The working states of the corresponding components in the different working modes are shown in the table 1:
| Mode | EM1 | EM2 | Break1 | Break2 |
| 1 | on | off | on | |
| 2 | off | on | on | off |
| 3 | off | on | off | on |
| 4 | on | on | on | |
| 5 | on | on | off | off |
the above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.
Claims (5)
1. A dual-motor multi-mode driving system based on a planetary gear is characterized in that: the driving system comprises a driving motor I, an input shaft I, a driving motor II, an input shaft II, a double-row single-sun-wheel planetary gear mechanism, a brake I, a brake II and a transmission mechanism;
the double-row single-sun-wheel planetary gear mechanism comprises a large sun wheel, a gear ring, an inner planetary gear, a large planet carrier, a small sun wheel, an outer planetary gear and a small planet carrier; the large sun wheel and the small sun wheel are sequentially arranged in parallel; the inner planetary gear is meshed and connected with the outer side of the circumference of the large sun gear; the large planet carrier is arranged on one side of the inner planet gear; the outer planetary gear is meshed and connected with the outer side of the circumference of the small sun gear; the small planet carrier is arranged on one side of the outer planet gear; the gear ring is arranged on the outer sides of the inner planetary gear and the outer planetary gear and is respectively meshed with the inner planetary gear and the outer planetary gear;
the driving motor I is connected with the gear ring through the input shaft I; the driving motor II is sequentially connected with the large planet carrier, the large sun gear and the small sun gear through the input shaft II; one side of the brake I is connected with the large planet carrier and used for braking the large planet carrier; one side of the brake II is connected with the gear ring and used for braking the gear ring; the transmission mechanism is arranged at the output end of the small planet carrier; and the torques of the driving motor I and the driving motor II are output to the power transmission mechanism through the small planet carrier.
2. A planetary gear based dual motor multi-mode drive system as claimed in claim 1, wherein: the power transmission mechanism comprises a main speed reducer input gear, a main speed reducer output gear and a differential mechanism; the input gear of the main speed reducer is meshed with the output end of the small planet carrier; and the output gear of the main reducer is meshed with the input gear of the main reducer, the power is transmitted to the differential mechanism, and finally the power is transmitted to the wheels to drive the automobile to run.
3. A planetary gear based dual motor multi-mode drive system as claimed in claim 1, wherein: the big sun gear and the small sun gear are coaxially connected with the input shaft II, namely, the big sun gear and the small sun gear share the same input shaft, and the rotating axes are superposed on the same straight line.
4. A planetary gear based dual motor multi-mode drive system as claimed in claim 2, wherein: the outside of double single sun gear planetary gear mechanism is provided with the train casing, stopper I, stopper II, final drive input gear and final drive output gear all are located inside the train casing.
5. A planetary gear based dual motor multi-mode drive system as claimed in claim 1, wherein: the driving system comprises five driving modes, namely a driving motor I driving mode, a driving motor II driving mode I, a driving motor II driving mode II, a double-motor torque coupling mode and a double-motor rotating speed coupling mode; wherein
Drive motor I drive mode: the driving motor I works to provide torque for a driving system, the brake I brakes the large planet carrier, and the driving motor II and the brake II do not work;
the driving mode I of the driving motor II is as follows: the driving motor II works to provide torque for a driving system, the brake I brakes the large planet carrier, and the driving motor I and the brake II do not work;
and driving a second driving mode of the driving motor II: the driving motor II works to provide torque for a driving system, the brake II brakes the gear ring, and the driving motor I and the brake I do not work;
dual motor torque coupling mode: the driving motor I and the driving motor II work simultaneously to provide torque for a driving system together, the brake I brakes the large planet carrier, and the brake II does not work;
double-motor rotating speed coupling mode: the driving motors I and II work simultaneously to provide torque for a driving system, and the brake I and the brake II do not work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210108664.4A CN114435124A (en) | 2022-01-28 | 2022-01-28 | Dual-motor multi-mode driving system based on planetary gear |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210108664.4A CN114435124A (en) | 2022-01-28 | 2022-01-28 | Dual-motor multi-mode driving system based on planetary gear |
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| CN114435124A true CN114435124A (en) | 2022-05-06 |
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| CN202210108664.4A Pending CN114435124A (en) | 2022-01-28 | 2022-01-28 | Dual-motor multi-mode driving system based on planetary gear |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115402081A (en) * | 2022-09-30 | 2022-11-29 | 燕山大学 | Double-motor driving system based on Lavenner type planetary gear train |
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