CN111717024A - Coaxial electric drive axle power assembly with disconnecting mechanism - Google Patents
Coaxial electric drive axle power assembly with disconnecting mechanism Download PDFInfo
- Publication number
- CN111717024A CN111717024A CN202010530344.9A CN202010530344A CN111717024A CN 111717024 A CN111717024 A CN 111717024A CN 202010530344 A CN202010530344 A CN 202010530344A CN 111717024 A CN111717024 A CN 111717024A
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- gear
- ring
- differential
- power
- shifting
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Classifications
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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
- 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
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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
- B60K17/043—Transmission unit disposed in on near the vehicle wheel, or between the differential gear unit and the wheel
- B60K17/046—Transmission unit disposed in on near the vehicle wheel, or between the differential gear unit and the wheel with planetary gearing having orbital motion
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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
- B60K17/16—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of differential gearing
- B60K17/165—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of differential gearing provided between independent half axles
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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
- B60K2001/001—Arrangement or mounting of electrical propulsion units one motor mounted on a propulsion axle for rotating right and left wheels of this axle
Abstract
The invention discloses a coaxial electric drive axle power assembly with a disconnecting mechanism, which comprises a motor, a sun gear, a fixed outer gear ring, a planetary gear, a differential case, a differential gear train and a power disconnecting mechanism, wherein the sun gear is arranged on a rotor shaft of the motor, the planetary gear is arranged on the differential case in a self-rotating mode and can drive the differential case to synchronously rotate by taking a rotating shaft of the sun gear as a center, the sun gear, the planetary gear, the differential case and the fixed outer gear ring form the planetary gear train, and power provided by the motor is input into the planetary gear train through the sun gear and is output by the differential case; the power input end of the power disconnecting mechanism is connected with the differential gear case, the power output end of the power disconnecting mechanism is connected with the differential gear train, and the power disconnecting mechanism can cut off or connect power transmission between the differential gear case and the differential gear train.
Description
Technical Field
The invention relates to the technical field of automobile driver power assemblies, in particular to a coaxial electric drive axle power assembly with a disconnecting mechanism.
Background
With the shortage of petroleum supply and the increasing aggravation of environmental pollution, the development of new energy automobiles is gradually valued, the new energy automobiles become the mainstream of the market in the future, and the new energy automobiles comprise various forms of pure electric front driving, pure electric rear driving, pure electric front and rear driving, pure electric four-wheel driving, hybrid power and the like. In pure electric front and rear drive, pure electric four-wheel drive and hybrid power drive systems, an electric drive axle power assembly can be used for auxiliary drive. The electric drive axle power assembly generally adopts a motor to provide power, inputs the power to a differential gear train after passing through a planetary gear train for speed reduction, and finally outputs the power to wheels through the differential gear train. Moreover, the conventional electric drive axle power assembly has a large volume and a non-compact structure, is not beneficial to the light weight of the whole vehicle, and influences the endurance capacity of the whole vehicle.
Disclosure of Invention
In view of the above, an object of the present invention is to overcome the defects in the prior art, and provide a coaxial electric drive axle power assembly with a disconnect mechanism, which can cut off power transmission when the entire vehicle does not need power compensation, avoid the rotation of the rotor shaft of the motor driven by the wheels, improve the transmission efficiency, reduce the drag torque, and at the same time, reduce the volume of the coaxial electric drive axle power assembly, make the structure more compact, and facilitate the light weight of the entire vehicle, thereby reducing the energy consumption of the entire vehicle and improving the cruising ability of the entire vehicle.
The invention relates to a coaxial electric drive axle power assembly with a disconnecting mechanism, which comprises a motor, a sun gear, a fixed outer gear ring, a planetary gear, a differential case, a differential gear train and a power disconnecting mechanism, wherein the sun gear is arranged on a rotor shaft of the motor, the planetary gear is arranged on the differential case in a self-rotating mode and can drive the differential case to synchronously rotate by taking a rotating shaft of the sun gear as a center, the sun gear, the planetary gear, the differential case and the fixed outer gear ring form a planetary gear train, and power provided by the motor is input into the planetary gear train through the sun gear and is output by the differential case; the power input end of the power disconnecting mechanism is connected with the differential gear case, the power output end of the power disconnecting mechanism is connected with the differential gear train, and the power disconnecting mechanism can cut off or joint power transmission between the differential gear case and the differential gear train.
Further, the power disconnection mechanism includes a shifter, a movable shift ring gear, and a fixed shift ring gear engageable with the movable shift ring gear, the fixed shift ring gear being provided on the power input end of the differential gear train, the movable shift ring gear being connected with the differential case, the shifter being capable of engaging or disengaging the movable shift ring gear with or from the fixed shift ring gear.
Further, the movable shift ring gear is provided inside the differential case, and the movable shift ring gear is connected to the differential case so as to be movable in the axial direction of the rotation shaft of the sun gear, the movable shift ring gear being non-rotatable relative to the differential case; the movable gear shifting gear ring and the fixed gear shifting gear ring are sequentially arranged in the axis direction of the rotating shaft of the sun gear, and the gear shifter can drive the movable gear shifting gear ring to move in the axis direction of the rotating shaft of the sun gear, so that the movable gear shifting gear ring and the fixed gear shifting gear ring are meshed and separated.
Further, the shifter and the movable gear shifting gear ring can generate magnetic fields after being electrified, the magnetic fields generated by the shifter and the magnetic fields generated by the movable gear shifting gear ring repel each other, and a return spring is further arranged between the movable gear shifting gear ring and the shifter.
Further, the vehicle-mounted power transmission device further comprises wheels, and the power output end of the differential gear train is in transmission connection with the wheels.
And the gear shifting control program can calculate the real-time gear shifting output rotating speed of the rotor shaft of the motor according to the rotating speed of the wheels and adjust the rotating speed of the rotor shaft of the motor to accord with the real-time gear shifting output rotating speed when the gear shifter is to enable the movable gear shifting gear ring to be meshed with the fixed gear shifting gear ring.
Furthermore, the planetary gear is a duplicate gear, the duplicate gear comprises a first gear and a second gear which are sequentially arranged along the axial direction and connected into a whole, the first gear is meshed with the fixed outer gear ring, and the second gear is meshed with the sun gear.
The invention has the beneficial effects that: according to the coaxial electric drive axle power assembly with the disconnecting mechanism, when the whole vehicle does not need power compensation, power transmission between the differential mechanism shell and the differential gear train can be cut off through the power disconnecting mechanism, so that the condition that wheels drive a rotor shaft of a motor to rotate is avoided, the transmission efficiency is improved, and the drag torque is reduced; when the whole vehicle is in the working conditions of full-force acceleration, overtaking and high-speed cruising, the invention starts the motor and is connected with the power transmission between the differential gear case and the differential gear train through the power disconnecting mechanism to carry out auxiliary driving, a rotor shaft of the motor drives the sun gear to rotate, the sun gear and the fixed outer gear ring enable the planetary gear to revolve around the rotating shaft of the sun gear while rotating, the planetary gear drives the differential gear case to rotate around the rotating shaft of the sun gear, and finally the differential gear case inputs power to the differential gear train through the power disconnecting mechanism; because the differential mechanism shell has the function of the planet carrier at the same time, the size of the coaxial electric drive axle power assembly can be reduced, the structure is more compact, and the light weight of the whole vehicle is facilitated, so that the energy consumption of the whole vehicle is reduced, and the cruising ability of the whole vehicle is improved.
Drawings
The invention is further described below with reference to the following figures and examples:
FIG. 1 is a schematic structural diagram of the present invention.
Description of reference numerals: 1-electric machine, 101-rotor shaft, 2-sun, 3-stationary outer ring gear, 4-planetary gear, 401-first gear, 402-second gear, 5-differential housing, 6-differential gear train, 7-gear shifter, 8-movable shift ring gear, 9-stationary shift ring gear, 10-wheels.
Detailed Description
Fig. 1 is a schematic structural diagram of the present invention, and as shown in the figure, the coaxial electric drive axle power assembly with a disconnecting mechanism in the present embodiment includes a motor 1, a sun gear 2, a fixed external gear ring 3, a planetary gear 4, a differential case 5, a differential gear train 6 and a power disconnecting mechanism, the sun gear 2 is mounted on a rotor shaft 101 of the motor 1, the planetary gear 4 is rotatably mounted on the differential case 5, and the planetary gears 4 can drive the differential case 5 to synchronously rotate around the rotation axis of the sun gear 2, the sun gear 2, the planetary gear 4, the differential case 5 and the fixed outer gear ring 3 constitute a planetary gear train, the power provided by the motor 1 is input into the planetary gear train through the sun gear 2 and is output by the differential case 5; the power input end of the power disconnecting mechanism is connected with the differential case 5, the power output end of the power disconnecting mechanism is connected with the differential gear train 6, and the power disconnecting mechanism can cut off or joint the power transmission between the differential case 5 and the differential gear train 6. The invention is suitable for being used as auxiliary drive in pure electric front and rear drive, pure electric four-wheel drive and hybrid power drive systems. When the whole vehicle does not need power compensation, the power transmission between the differential case 5 and the differential gear train 6 can be cut off through the power disconnecting mechanism, the wheels 10 are prevented from driving the rotor shaft 101 of the motor 1 to rotate, the transmission efficiency is improved, and the dragging torque is reduced; when the whole vehicle is in the working conditions of full-force acceleration, overtaking and high-speed cruising, the invention starts the motor 1 and is connected with the power transmission between the differential gear case 5 and the differential gear train 6 through the power disconnecting mechanism to carry out auxiliary driving, the rotor shaft 101 of the motor 1 drives the sun gear 2 to rotate, the sun gear 2 and the fixed external gear ring 3 enable the planetary gear 4 to revolve around the rotating shaft of the sun gear 2 while rotating, the planetary gear 4 drives the differential gear case 5 to rotate around the rotating shaft of the sun gear 2, and finally the differential gear case 5 inputs power to the differential gear train 6 through the power disconnecting mechanism; because differential mechanism casing 5 has the effect of planet carrier concurrently simultaneously, consequently can reduce coaxial-type electric drive axle power assembly's volume, make the structure compacter, do benefit to whole car lightweight to reduce whole car energy consumption, improve whole car duration.
In the present embodiment, the power cutoff mechanism includes a shifter 7, a movable shift ring gear 8, and a fixed shift ring gear 9 engageable with the movable shift ring gear 8, the fixed shift ring gear 9 is provided on the power input end of the differential gear train 6, the movable shift ring gear 8 is connected to the differential case 5, and the shifter 7 can engage or disengage the movable shift ring gear 8 with or from the fixed shift ring gear 9. Gear transmission is adopted between the movable gear shifting gear ring 8 and the fixed gear shifting gear ring 9, heat generated in the transmission process is low, the transmission ratio is accurate, the transmission efficiency is high, and the structure is compact.
In the present embodiment, the movable shift ring gear 8 is provided inside the differential case 5, and the movable shift ring gear 8 is connected to the differential case 5 so as to be movable in the axial direction of the rotation shaft of the sun gear 2, and the movable shift ring gear 8 is not rotatable relative to the differential case 5; the movable gear shifting gear ring 8 and the fixed gear shifting gear ring 9 are sequentially arranged along the axis direction of the rotating shaft of the sun gear 2, and the gear shifter 7 can drive the movable gear shifting gear ring 8 to move along the axis direction of the rotating shaft of the sun gear 2, so that the movable gear shifting gear ring 8 and the fixed gear shifting gear ring 9 are meshed and separated.
In this embodiment, the shifter 7 and the movable shifting ring gear 8 both generate magnetic fields after being powered on, the magnetic field generated by the shifter 7 and the magnetic field generated by the movable shifting ring gear 8 repel each other, and a return spring is further disposed between the movable shifting ring gear 8 and the shifter 7. After the shifter 7 and the movable shifting gear ring 8 are electrified, the shifter 7 enables the movable shifting gear ring 8 to move towards the fixed shifting gear ring 9, the return spring is stretched, and the movable shifting gear ring 8 is meshed with the fixed shifting gear ring 9; after the electrification to the gear shifter 7 and the movable gear shifting gear ring 8 is stopped, the return spring contracts to drive the movable gear shifting gear ring 8 to be separated from the fixed gear shifting gear ring 9.
In the embodiment, the vehicle further comprises a wheel 10, and the power output end of the differential gear train 6 is in transmission connection with the wheel 10.
In this embodiment, the shift control system further includes a shift control program built in the entire vehicle control system, and when the shifter 7 is to engage the movable shift ring gear 8 with the fixed shift ring gear 9, the shift control program can calculate the real-time shift output rotation speed of the rotor shaft 101 of the motor 1 according to the rotation speed of the wheel 10, and adjust the rotation speed of the rotor shaft 101 of the motor 1 to meet the real-time shift output rotation speed. Because the invention is used for auxiliary drive in pure electric front and rear drive, pure electric four-wheel drive and hybrid drive systems, when shifting gears, because the vehicle is in motion state, the rotation of the wheels 10 can drive the differential gear train 6 to move, thereby causing the fixed shifting gear ring 9 to rotate when shifting gears, at this time, the gear shifting control program can calculate the rotating speed of the fixed shifting gear ring 9 according to the rotating speed of the wheels 10 and the transmission ratio of the differential gear train, the rotating speeds of the movable shifting gear ring 8 and the fixed shifting gear ring 9 are the same when being meshed, therefore, the calculated rotating speed of the fixed shifting gear ring 9 is the target rotating speed of the movable shifting gear ring 8, then the rotating speed of the sun gear 2 is calculated according to the target rotating speed of the movable shifting gear ring 8 and the transmission ratio of the planetary gear train, the rotating speed of the sun gear 2 is the real-time gear shifting output rotating speed of the rotor shaft 101 of the motor 1, and finally, the rotating speed of, so that the speed of rotation of the movable shifting ring gear 8 is the same as the speed of rotation of the fixed shifting ring gear 9.
In this embodiment, the planetary gear 4 is a duplicate gear, the duplicate gear includes a first gear 401 and a second gear 402 that are sequentially disposed along an axial direction and connected as a whole, the first gear 401 is engaged with the fixed outer ring gear 3, and the second gear 402 is engaged with the sun gear 2. The dual gears can be matched with the speed ratio, and the distribution of all parts can be more compact.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (7)
1. The utility model provides a take disconnect-mechanism's electronic transaxle power assembly of coaxial-type which characterized in that: the power-driven planetary gear set comprises a motor (1), a sun gear (2), a fixed outer gear ring (3), a planetary gear (4), a differential case (5), a differential gear train (6) and a power disconnecting mechanism, wherein the sun gear (2) is installed on a rotor shaft (101) of the motor (1), the planetary gear (4) is installed on the differential case (5) in a self-rotating mode, the planetary gear (4) can drive the differential case (5) to synchronously rotate by taking a rotating shaft of the sun gear (2) as a center, the sun gear (2), the planetary gear (4), the differential case (5) and the fixed outer gear ring (3) form the planetary gear train, and power provided by the motor (1) is input into the planetary gear train through the sun gear (2) and is output by the differential case (5); the power input end of the power disconnecting mechanism is connected with the differential case (5), the power output end of the power disconnecting mechanism is connected with the differential gear train (6), and the power disconnecting mechanism can cut off or joint power transmission between the differential case (5) and the differential gear train (6).
2. The coaxial electric transaxle powertrain with a disconnect mechanism of claim 1, wherein: the power disconnection mechanism comprises a shifter (7), a movable gear shifting ring gear (8) and a fixed gear shifting ring gear (9) capable of being engaged with the movable gear shifting ring gear (8), the fixed gear shifting ring gear (9) is arranged on the power input end of the differential gear train (6), the movable gear shifting ring gear (8) is connected with the differential housing (5), and the shifter (7) can enable the movable gear shifting ring gear (8) to be engaged with or disengaged from the fixed gear shifting ring gear (9).
3. The coaxial electric transaxle powertrain with a disconnect mechanism of claim 2, wherein: the movable gear shifting ring gear (8) is arranged inside the differential case (5), the movable gear shifting ring gear (8) is connected with the differential case (5) in a mode of being capable of moving along the axial direction of the rotating shaft of the sun gear (2), and the movable gear shifting ring gear (8) and the differential case (5) are not capable of rotating relatively; the movable gear shifting gear ring (8) and the fixed gear shifting gear ring (9) are sequentially arranged in the axis direction of the rotating shaft of the sun gear (2), and the gear shifter (7) can drive the movable gear shifting gear ring (8) to move in the axis direction of the rotating shaft of the sun gear (2), so that the movable gear shifting gear ring (8) and the fixed gear shifting gear ring (9) are meshed and separated.
4. The coaxial electric transaxle powertrain with a disconnect mechanism of claim 2, wherein: the gear shifter (7) and the movable gear shifting gear ring (8) can generate magnetic fields after being electrified, the magnetic field generated by the gear shifter (7) and the magnetic field generated by the movable gear shifting gear ring (8) repel each other, and a return spring is further arranged between the movable gear shifting gear ring (8) and the gear shifter (7).
5. The coaxial electric transaxle powertrain with a disconnect mechanism of claim 2, wherein: the vehicle-mounted differential gear train is characterized by further comprising wheels (10), wherein the power output end of the differential gear train (6) is in transmission connection with the wheels (10).
6. The coaxial electric transaxle powertrain with a disconnect mechanism of claim 5, wherein: the gear shifting control system is characterized by further comprising a gear shifting control program arranged in the whole vehicle control system, when the gear shifter (7) is to enable the movable gear shifting gear ring (8) to be meshed with the fixed gear shifting gear ring (9), the gear shifting control program can calculate the real-time gear shifting output rotating speed of the rotor shaft (101) of the motor (1) according to the rotating speed of the wheels (10), and adjust the rotating speed of the rotor shaft (101) of the motor (1) to accord with the real-time gear shifting output rotating speed.
7. The coaxial electric transaxle powertrain with a disconnect mechanism of claim 1, wherein: the planetary gear (4) is a duplicate gear, the duplicate gear comprises a first gear (401) and a second gear (402) which are sequentially arranged along the axial direction and connected into a whole, the first gear (401) is meshed with the fixed outer gear ring (3), and the second gear (402) is meshed with the sun gear (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010530344.9A CN111717024B (en) | 2020-06-11 | 2020-06-11 | Coaxial electric drive axle power assembly with disconnecting mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010530344.9A CN111717024B (en) | 2020-06-11 | 2020-06-11 | Coaxial electric drive axle power assembly with disconnecting mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111717024A true CN111717024A (en) | 2020-09-29 |
| CN111717024B CN111717024B (en) | 2023-03-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010530344.9A Active CN111717024B (en) | 2020-06-11 | 2020-06-11 | Coaxial electric drive axle power assembly with disconnecting mechanism |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112659889A (en) * | 2020-12-23 | 2021-04-16 | 浙江吉利控股集团有限公司 | Coaxial pure electric vehicle power system with power disconnection function and vehicle |
| WO2023072735A1 (en) * | 2021-10-27 | 2023-05-04 | Punch Powertrain Psa E-Transmissions N.V. | Transmission comprising a disconnect unit and electric vehicle comprising such a transmission |
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