CN112918235B - A multi-main reducer dual-motor coupling drive system - Google Patents
A multi-main reducer dual-motor coupling drive system Download PDFInfo
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- CN112918235B CN112918235B CN201911242041.0A CN201911242041A CN112918235B CN 112918235 B CN112918235 B CN 112918235B CN 201911242041 A CN201911242041 A CN 201911242041A CN 112918235 B CN112918235 B CN 112918235B
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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
- B60K1/00—Arrangement or mounting of electrical propulsion units
- B60K1/02—Arrangement or mounting of electrical propulsion units comprising more than one electric motor
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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
-
- 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
- B60K17/16—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location or kind of gearing of differential gearing
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention discloses a double-motor coupling driving system with multiple main speed reducers, which consists of a main driving motor, a main motor driving gear, a rotating speed coupling device, an auxiliary motor driving gear, an auxiliary driving motor, an auxiliary motor driven gear, a differential mechanism, a rotating speed coupling driven gear, a main motor driven gear and an electromagnetic clutch. By changing different opening and closing states of the electromagnetic clutch and different working states of the two driving motors, four driving modes of double-motor rotating speed coupling driving, double-motor torque coupling driving, independent driving of the main motor and independent driving of the auxiliary motor can be realized, different driving working conditions can be matched by utilizing the high-efficiency interval of the two driving motors more fully, the economy of the whole vehicle is improved, and the endurance mileage is improved. Meanwhile, a multi-main speed reduction design is adopted, power in different driving modes is directly output to the differential mechanism, transmission links are few, transmission efficiency is high, torque coupling is directly carried out by adopting a differential mechanism shell, the number of shafting is reduced, and the structure is more compact.
Description
Technical Field
The invention belongs to the technical field of new energy automobile power assemblies, and particularly relates to a double-motor coupling driving system of a pure electric automobile.
Background
At present, the traditional automobile industry starts to change to electric type under the double pressures of energy and ecology, and the main disadvantage of pure electric automobiles in daily use is insufficient endurance, so that the reliability of the pure electric automobiles in long-distance driving application is not high. Therefore, an important ring for developing pure electric vehicles and improving user experience is to strengthen the endurance of the pure electric vehicles.
The electric automobile adopts a double-motor coupling driving system, can divide one large-capacity motor into two small-capacity motors to drive the automobile, avoids the motor load rate from being too low when the automobile is in a low-load working condition, can realize the complementation of the mechanical characteristics of the two motors through the coupling device, faces to various working conditions in the running process of the automobile, and can enable the two motors to run in an own high-efficiency zone as far as possible. Therefore, no matter what energy supply form (a storage battery or a fuel cell) is adopted by the electric automobile, compared with a vehicle driven by a single motor or multiple motors independently, the vehicle with the double-motor coupling driving system is expected to realize more efficient driving, thereby achieving the purposes of saving energy and improving the endurance mileage. The related art has many patent publications, but most of the patent publications have complicated structures due to overall pursuit of functions, so that the transmission device is large in size and unfavorable for whole vehicle arrangement, and meanwhile, part of energy is lost due to more transmission links. The related patent mainly realizes power coupling in two ways, one adopts a floating stator, such as the utility model CN 207510200U, the structure is simple, but because the floating stator needs to be powered by a collecting ring and an electric brush, the reliability of the system is reduced, the maintenance cost is increased, the moment of inertia of the stator is larger, and the other adopts a planetary gear row to be matched with a fixed shaft gear train to realize different power coupling modes, the structure works stably, but the power coupling device occupies larger space, and more transmission links can generate additional energy loss.
Disclosure of Invention
The invention aims to improve the endurance mileage of the pure electric vehicle in a mode of improving the efficiency of a driving system, and simultaneously reduce the size of a power coupling device as much as possible, so that a larger space is reserved for a power battery pack.
The multi-main-reducer double-motor coupling driving system comprises a main driving motor, a main motor driving gear, a first electromagnetic clutch, a rotating speed coupling driving gear, a rotating speed coupling device, a second electromagnetic clutch, an auxiliary motor driving gear, an auxiliary driving motor, an auxiliary motor driven gear, a third electromagnetic clutch, a differential, a rotating speed coupling driven gear, a fourth electromagnetic clutch and a main motor driven gear, wherein the main motor driving gear, the main motor driven gear, the rotating speed coupling driving gear, the rotating speed coupling driven gear, the auxiliary motor driving gear and the auxiliary motor driven gear form three sets of main reducers, an output shaft of the main driving motor directly drives the main motor driving gear, the main motor driven gear is suspended on a half shaft through a hollow shaft and is connected to a differential shell through a fourth electromagnetic clutch, the auxiliary motor driven gear is suspended on the half shaft through a third electromagnetic clutch, the main motor driving gear and the auxiliary motor driving gear form three sets of main reducers, the main motor driving gear and the auxiliary motor driving gear are respectively connected with the rotating speed coupling device through the first electromagnetic clutch and the second electromagnetic clutch, and the rotating speed coupling device is arranged on the differential shell.
Further, splines are machined on two sides of the shell of the clutch and are matched with splines on driven parts of the fourth electromagnetic clutch and the third electromagnetic clutch respectively.
Further, the rotational speed coupling device adopts a straight bevel gear planetary gear train structure.
Compared with the existing double-motor coupling driving system, the structure simplifies a shafting structure, the power coupling device is more compact, and the radial dimension is small, so that the space arrangement in a vehicle is facilitated. (2) The invention can realize multiple driving modes while keeping compact structure, can be independently driven by the auxiliary motor for the crowded road conditions of frequent start-stop and slow running so as to reduce loss, and can respectively keep the efficient driving of the two motors through a torque coupling mode and a rotating speed coupling mode for the limit working conditions of climbing and high speed. (3) The invention changes the design of a single main speed reducer of the traditional drive axle, the power of the rotating speed coupling device and the torque coupling device are directly output to the differential mechanism shell, the transmission links are fewer, the transmission route is short, and compared with other double-motor coupling configurations, the invention is more beneficial to improving the transmission efficiency of the drive system.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention.
Fig. 2 is an energy flow diagram of a rotational speed coupled drive mode.
Fig. 3 is an energy flow schematic of a torque coupled drive mode.
Fig. 4 is an energy flow diagram of the main motor individual driving mode.
Fig. 5 is an energy flow diagram of the auxiliary motor alone driving mode.
The reference numerals indicate that 1, a main driving motor, 2, a main motor driving gear, 3, a first electromagnetic clutch, 4, a rotating speed coupling driving gear, 5, a rotating speed coupling device, 6, a second electromagnetic clutch, 7, an auxiliary motor driving gear, 8, an auxiliary driving motor, 9, an auxiliary motor driven gear, 10, a third electromagnetic clutch, 11, a differential, 12, a rotating speed coupling driven gear, 13, a fourth electromagnetic clutch, 14, a main motor driven gear.
Detailed Description
The invention will be further described with reference to the drawings and examples, it being understood that the preferred examples are given for the purpose of illustration only and are not intended to limit the scope of the invention.
A multi-main-reducer double-motor coupling driving system comprises a main driving motor 1, a main motor driving gear 2, a first electromagnetic clutch 3, a rotating speed coupling driving gear 4, a rotating speed coupling device 5, a second electromagnetic clutch 6, an auxiliary motor driving gear 7, an auxiliary driving motor 8, an auxiliary motor driven gear 9, a third electromagnetic clutch 10, a differential 11, a rotating speed coupling driven gear 12, a fourth electromagnetic clutch 13 and a main motor driven gear 14, wherein the main motor driving gear 2 and the main motor driven gear 14, the rotating speed coupling driving gear 4 and the rotating speed coupling driven gear 12, the auxiliary motor driving gear 7 and the auxiliary motor driven gear 9 form three sets of main reducers, the main driving motor 1 and the auxiliary driving motor 8 are coaxially arranged on opposite sides, an output shaft of the main driving motor 1 directly drives the main motor driving gear 2, the main motor driven gear 14 is suspended on a half shaft through a hollow shaft and is connected to a differential 11 shell through the fourth electromagnetic clutch 13, the auxiliary motor driven gear 9 is suspended on the half shaft through the hollow shaft and is connected to a main motor shell 2 through the third electromagnetic clutch 10, the rotating speed coupling device is mounted on the main motor driving gear 2 and the auxiliary motor driven gear 7 through the differential shell 4, and the rotating speed coupling device is mounted on the main motor driving gear 2 and the differential 11.
In this embodiment, splines are machined on both sides of the housing of the clutch 11, and the splines are respectively matched with splines on driven parts of the fourth electromagnetic clutch 13 and the third electromagnetic clutch 10, so that torque coupling in the differential housing is realized.
In this embodiment, the rotational speed coupling device 5 adopts a straight bevel gear planetary gear train structure to further reduce the radial dimension of the power coupling device.
In the invention, the main driving motor 1 and the auxiliary driving motor 8 can be replaced by other power sources (such as an internal combustion engine), namely, the power coupling device can be adapted to different types of power source combinations.
The invention provides a double-motor coupling driving system with multiple main speed reducers, which has the following working principle:
The controller realizes the conversion of different working modes by controlling different opening and closing states of the four electromagnetic clutches and different working states of the two driving motors, wherein the table 1 lists the driving mode relations corresponding to the different opening and closing states of the clutches, in the table 1, "two ∈" represents the engagement of the clutches, "two-.
TABLE 1 correspondence between actuator states and drive modes
In the rotation speed coupling driving mode, the first electromagnetic clutch 3 and the second electromagnetic clutch 6 are engaged, and both driving motors are in a motor working state. The power of the main driving motor 1 and the auxiliary driving motor 8 is transmitted to a sun gear of the rotating speed coupling device 5 through the first electromagnetic clutch 3 and the second electromagnetic clutch 6, the sun gear drives the rotating speed coupling driving gear 4 outside the rotating speed coupling device shell through the planet gears, the rotating speed coupling driving gear 4 drives the rotating speed coupling driven gear 12 on the differential shell, the differential 11 distributes the power to the two driving half shafts to drive the wheels, and the energy flow route in the mode can be referred to as fig. 2. The rotating speed coupling working mode is suitable for the working condition of high-speed cruising of the automobile.
In the torque coupling mode, the fourth electromagnetic clutch 13 and the third electromagnetic clutch 10 are engaged, and both drive motors operate in the motor state. The power of the main driving motor 1 is transmitted to the housing of the differential 5 via the main motor driving gear 2, the main motor driven gear 14 and the fourth electromagnetic clutch 13, the power of the auxiliary motor 8 is transmitted to the housing of the differential 5 via the auxiliary motor driving gear 7, the auxiliary motor driven gear 9 and the third electromagnetic clutch 10, the power of the two motors is directly coupled to the differential housing, the differential 5 distributes the power to the two driving half-shaft driving wheels, and the energy flow route in this mode can be referred to in fig. 3. The torque coupling working mode is suitable for low-speed and high-torque working conditions such as climbing of automobiles.
In the main motor individual driving mode, only the fourth electromagnetic clutch 13 is engaged, the main driving motor is operated in the motor state, and the auxiliary driving motor is turned off. The power of the main drive motor 1 is transmitted to the housing of the differential 5 via the main motor driving gear 2, the main motor driven gear 14, the fourth electromagnetic clutch 13, the differential 5 distributes the power to the two drive half-shaft driven wheels, and the energy flow path in this mode can be seen with reference to fig. 4. The independent driving working mode of the main motor is suitable for the starting and medium-speed cruising working conditions of the automobile.
In the torque coupling mode, the fourth electromagnetic clutch 13 and the third electromagnetic clutch 10 are engaged, and both drive motors operate in the motor state. The power of the main driving motor 1 is transmitted to the housing of the differential 5 via the main motor driving gear 2, the main motor driven gear 14 and the fourth electromagnetic clutch 13, the power of the auxiliary motor 8 is transmitted to the housing of the differential 5 via the auxiliary motor driving gear 7, the auxiliary motor driven gear 9 and the third electromagnetic clutch 10, the power of the two motors is directly coupled to the differential housing, the differential 5 distributes the power to the two driving half-shaft driving wheels, and the energy flow route in this mode can be referred to in fig. 3. The torque coupling working mode is suitable for low-speed and high-torque working conditions such as climbing of automobiles.
Corresponding to the 4 driving working modes, when the working motor is switched from the motor state to the generator state, the braking energy recovery of the corresponding modes can be realized.
The foregoing is illustrative of the present invention and is not limited to the specific embodiments of the present invention described above, but is intended to be within the scope of the present invention as long as the various modifications made by the method concepts and technical solutions of the present invention are adopted, or the present invention is directly applied to other occasions without improvement.
Claims (1)
1. A multi-main-reducer double-motor coupling driving system comprises a main driving motor (1), a main motor driving gear (2), a first electromagnetic clutch (3), a rotating speed coupling driving gear (4), a rotating speed coupling device (5), a second electromagnetic clutch (6), an auxiliary motor driving gear (7), an auxiliary driving motor (8), an auxiliary motor driven gear (9), a third electromagnetic clutch (10), a differential (11), a rotating speed coupling driven gear (12), a fourth electromagnetic clutch (13) and a main motor driven gear (14), and is characterized in that the main motor driving gear (2) and the main motor driven gear (14) are connected in a driving mode, The rotation speed coupling driving gear (4) and the rotation speed coupling driven gear (12), The auxiliary motor driving gear (7) and the auxiliary motor driven gear (9) form three sets of main speed reducers, the main driving motor (1) and the auxiliary driving motor (8) are arranged on opposite sides and coaxially, an output shaft of the main driving motor (1) directly drives the main motor driving gear (2), a main motor driven gear (14) is suspended on a half shaft through a hollow shaft and is connected to a differential gear (11) shell through a fourth electromagnetic clutch (13), an output shaft of the auxiliary driving motor (8) directly drives the auxiliary motor driving gear (7), the auxiliary motor driven gear (9) is suspended on the half shaft through the hollow shaft and is connected to a differential gear shell through a third electromagnetic clutch (10), shafts of the main motor driving gear (2) and the auxiliary motor driving gear (7) are respectively connected with two sun gears of a rotating speed coupling device through a first electromagnetic clutch (3) and a second electromagnetic clutch (6), the rotating speed coupling device (5) is installed on a shell, the driving gear (4) is installed on the rotating speed coupling device shell, and the driven gear (12) is installed on the differential gear shell through a first electromagnetic clutch (12) and the rotating speed coupling device is controlled on the driven gear shell (11), The different opening and closing states of the second electromagnetic clutch, the third electromagnetic clutch and the fourth electromagnetic clutch and the different working states of the main driving motor and the auxiliary driving motor can realize four different working modes, namely a rotating speed coupling driving mode, a torque coupling mode, a main motor independent driving mode and an auxiliary motor independent driving mode, wherein in the rotating speed coupling driving mode, the first electromagnetic clutch, the second electromagnetic clutch, the third electromagnetic clutch, the auxiliary driving motor and the fourth electromagnetic clutch are respectively arranged in the rotating speed coupling driving mode, The power of the main driving motor and the auxiliary driving motor is transmitted to a sun gear of a rotating speed coupling device through a first electromagnetic clutch and a second electromagnetic clutch, the sun gear drives a rotating speed coupling driving gear outside a rotating speed coupling device shell through a planet wheel, the rotating speed coupling driving gear drives a rotating speed coupling driven gear on a differential mechanism shell, the differential mechanism distributes power to two driving half shafts to drive wheels, a fourth electromagnetic clutch is connected with a third electromagnetic clutch under a torque coupling mode, the two driving motors work in the motor state, and the power of the main driving motor is transmitted to a driving gear of the main driving motor through a driving gear of the main motor, The power of the auxiliary motor is transmitted to the shell of the differential mechanism through the auxiliary motor driving gear, the auxiliary motor driven gear and the third electromagnetic clutch, the power of the two motors is directly coupled with the differential mechanism shell, the differential mechanism distributes the power to the two driving half shaft driving wheels, in the independent driving mode of the main motor, only the fourth electromagnetic clutch is engaged, the main driving motor works in a motor state, the auxiliary driving motor is powered off, the power of the main driving motor is transmitted to the shell of the differential mechanism through the main motor driving gear, the main motor driven gear and the fourth electromagnetic clutch, the differential mechanism distributes the power to the two driving half shaft driving wheels, in the independent driving mode of the auxiliary motor, only the third electromagnetic clutch is engaged, the main driving motor is powered off, the auxiliary driving motor works in the motor state, the power of the auxiliary motor works in the motor state through the auxiliary motor driving gear, The auxiliary motor driven gear and the electromagnetic clutch are transmitted to a shell of the differential, and the differential distributes power to the two driving half shafts to drive wheels;
splines are machined on two sides of a shell of the differential mechanism (11), and the splines are matched with splines on driven parts of the fourth electromagnetic clutch (13) and the third electromagnetic clutch (10) respectively;
the rotating speed coupling device (5) adopts a straight bevel gear planetary gear train structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201911242041.0A CN112918235B (en) | 2019-12-06 | 2019-12-06 | A multi-main reducer dual-motor coupling drive system |
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| CN201911242041.0A CN112918235B (en) | 2019-12-06 | 2019-12-06 | A multi-main reducer dual-motor coupling drive system |
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| CN112918235A CN112918235A (en) | 2021-06-08 |
| CN112918235B true CN112918235B (en) | 2025-04-22 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113370773B (en) * | 2021-07-30 | 2025-01-03 | 山推(德州)工程机械有限公司 | Travel power system of electric loader with dual motor input and control method thereof |
| DE102021120594A1 (en) * | 2021-08-09 | 2023-02-09 | Bayerische Motoren Werke Aktiengesellschaft | Device for controlling a single wheel drive in two-axle electrified motor vehicles |
| CN114714874B (en) * | 2022-04-29 | 2025-06-17 | 无锡星驱动力科技有限公司 | Dual-motor electric drive assembly and vehicle |
| WO2025138575A1 (en) * | 2023-12-29 | 2025-07-03 | 广州汽车集团股份有限公司 | Power system and vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN211684626U (en) * | 2019-12-06 | 2020-10-16 | 华东交通大学 | A dual-motor coupling drive system with multiple main reducers |
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| CN105751881B (en) * | 2016-02-26 | 2018-07-06 | 重庆大学 | A kind of bi-motor planet coupling drive system |
| CN106965661B (en) * | 2017-04-21 | 2023-04-07 | 吉林大学 | Double-motor coupling drive axle with torque directional distribution function |
| CN108909426B (en) * | 2018-08-27 | 2024-03-01 | 吉林大学 | A dual-motor coupled planetary gearbox two-speed transaxle |
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| CN211684626U (en) * | 2019-12-06 | 2020-10-16 | 华东交通大学 | A dual-motor coupling drive system with multiple main reducers |
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