CN111376714B - Electrically-driven speed reducer, electrically-driven axle power assembly and vehicle - Google Patents
Electrically-driven speed reducer, electrically-driven axle power assembly and vehicle Download PDFInfo
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- CN111376714B CN111376714B CN201811639266.5A CN201811639266A CN111376714B CN 111376714 B CN111376714 B CN 111376714B CN 201811639266 A CN201811639266 A CN 201811639266A CN 111376714 B CN111376714 B CN 111376714B
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- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 50
- 230000007246 mechanism Effects 0.000 claims abstract description 37
- 230000008878 coupling Effects 0.000 claims abstract description 20
- 238000010168 coupling process Methods 0.000 claims abstract description 20
- 238000005859 coupling reaction Methods 0.000 claims abstract description 20
- 230000009467 reduction Effects 0.000 abstract description 5
- 229910000831 Steel Inorganic materials 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
- B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location or kind of gearing
- B60K17/12—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location or kind of gearing of electric gearing
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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
-
- 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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
- F16H3/44—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion using gears having orbital motion
- F16H2003/445—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion using gears having orbital motion without permanent connection between the input and the set of orbital gears
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H2200/00—Transmissions for multiple ratios
- F16H2200/20—Transmissions using gears with orbital motion
- F16H2200/202—Transmissions using gears with orbital motion characterised by the type of Ravigneaux set
- F16H2200/2023—Transmissions using gears with orbital motion characterised by the type of Ravigneaux set using a Ravigneaux set with 4 connections
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H2200/00—Transmissions for multiple ratios
- F16H2200/20—Transmissions using gears with orbital motion
- F16H2200/203—Transmissions using gears with orbital motion characterised by the engaging friction means not of the freewheel type, e.g. friction clutches or brakes
- F16H2200/2035—Transmissions using gears with orbital motion characterised by the engaging friction means not of the freewheel type, e.g. friction clutches or brakes with two engaging means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H2200/00—Transmissions for multiple ratios
- F16H2200/20—Transmissions using gears with orbital motion
- F16H2200/2097—Transmissions using gears with orbital motion comprising an orbital gear set member permanently connected to the housing, e.g. a sun wheel permanently connected to the housing
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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)
- Retarders (AREA)
Abstract
The invention discloses an electrically-driven speed reducer, an electrically-driven axle power assembly and a vehicle, wherein the electrically-driven speed reducer comprises: the power coupling device comprises a Ravigneaux planetary gear mechanism, wherein a large sun gear of the Ravigneaux planetary gear mechanism can be selectively coupled with the power of a driving motor, a small sun gear of the Ravigneaux planetary gear mechanism is locked, a public planet carrier of the Ravigneaux planetary gear mechanism can be selectively coupled with the power of the driving motor, and the public planet carrier is used for being connected with the input end of a differential mechanism. The electrically-driven speed reducer disclosed by the invention has the advantages that through the arrangement of the Ravigneaux planetary gear mechanism, the electrically-driven speed reducer can output the power of the driving motor through speed reduction or constant speed output, and has two selectable speed ratios to carry out power output, so that the applicability of the electrically-driven speed reducer is enhanced, the structure is simple, the cost is low, and the power performance and the economical efficiency of a vehicle carrying the electrically-driven speed reducer are improved.
Description
Technical Field
The invention belongs to the technical field of vehicle manufacturing, and particularly relates to an electric drive speed reducer, an electric drive axle power assembly and a vehicle.
Background
Hybrid drive automobiles, electric automobiles and extended range electric automobiles are the development direction of future automobiles and are also the main form of new energy automobiles. In the related art, the electrically-driven speed reducer is complex in structure, complex in working mode and complex in control strategy, the energy conversion efficiency needs to be improved, the electric energy of the battery cannot be fully utilized, and the problems of complex control and low efficiency exist.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. To this end, an object of the invention is to propose an electrically driven retarder.
An electrically driven speed reducer according to an embodiment of the present invention includes: the power coupling device comprises a Ravigneaux planetary gear mechanism, wherein a large sun gear of the Ravigneaux planetary gear mechanism can be selectively coupled with the power of a driving motor, a small sun gear of the Ravigneaux planetary gear mechanism is locked, a public planet carrier of the Ravigneaux planetary gear mechanism can be selectively coupled with the power of the driving motor, and the public planet carrier is used for being connected with the input end of a differential mechanism.
The electrically-driven speed reducer disclosed by the invention has the advantages that through the arrangement of the Ravigneaux planetary gear mechanism, the electrically-driven speed reducer can output the power of the driving motor through speed reduction or constant speed output, and has two selectable speed ratios to carry out power output, so that the applicability of the electrically-driven speed reducer is enhanced, the structure is simple, the cost is low, and the power performance and the economical efficiency of a vehicle carrying the electrically-driven speed reducer are improved.
An electrically driven retarder according to one embodiment of the invention, having a first gear mode of operation and a second gear mode of operation; when the first gear working mode is adopted, the large sun gear is in power coupling connection with the driving motor, and the common planet carrier is disconnected with the driving motor; and in the second gear working mode, the common planet carrier is in power coupling connection with the driving motor, and the large sun gear is disconnected with the driving motor.
An electrically driven speed reducer according to an embodiment of the present invention further includes: the first fixed part of the first clutch is used for being connected with the driving motor, and the first movable part of the first clutch is connected with the large sun gear; and a second fixed part of the second clutch is used for being connected with the driving motor, and a second movable part of the second clutch is connected with the common planet carrier.
According to the electrically driven speed reducer of one embodiment of the present invention, the first fixing portion and the second fixing portion are integrally provided.
An electrically driven speed reducer according to an embodiment of the present invention further includes: the first input shaft is connected with the large sun gear and is connected with the first movable part; a second input shaft connected to the common planet carrier, and the second input shaft is connected to the second movable portion.
According to the electrically-driven speed reducer of one embodiment of the invention, the second input shaft is a hollow shaft and is hollow and sleeved outside the first input shaft.
The invention also provides an electric drive axle power assembly, comprising: the electric drive axle power assembly comprises a drive motor and the electric drive axle power assembly according to any embodiment of the invention, wherein the drive motor is in power coupling connection with the first sun gear.
The electric drive axle power assembly has the same advantages of the electrically-driven speed reducer compared with the prior art, and the detailed description is omitted.
The invention also provides a vehicle comprising the electric drive axle power assembly according to the embodiment of the invention.
The vehicle has the same advantages of the electrically-driven speed reducer and the electrically-driven axle power assembly compared with the prior art, and the detailed description is omitted.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic diagram of an electrically driven retarder according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an electric drive axle powertrain according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a vehicle according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a vehicle according to another embodiment of the present invention;
FIG. 5 is a schematic diagram of an electric drive axle powertrain according to one embodiment of the present invention.
Reference numerals:
a vehicle 2000;
an electric drive axle powertrain 1000;
an electrically driven speed reducer 100; a driving motor 200; a differential mechanism 300; a wheel 400;
a Ravigneaux planetary gear mechanism 1; a large sun gear 11; a small sun gear 12; a common planet carrier 13; a ring gear 14; a short planet wheel 15; a long planetary gear 16;
a first fixing portion 211; a first movable portion 212; a second fixing portion 221; the second movable portion 222;
the first input shaft 31; a second input shaft 32.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
An electrically-driven speed reducer 100 according to an embodiment of the invention is described below with reference to fig. 1.
The electrically-driven speed reducer 100 according to the present invention includes: the Ravigneaux planetary gear mechanism 1 is characterized in that a large sun gear 11 of the Ravigneaux planetary gear mechanism 1 can be selectively in power coupling connection with a driving motor 200, a small sun gear 12 of the Ravigneaux planetary gear mechanism 1 is locked, a common planet carrier 13 of the Ravigneaux planetary gear mechanism 1 can be selectively in power coupling connection with the driving motor 200, a gear ring 14 is unlocked, and the common planet carrier 13 is used for being connected with an input end of a differential mechanism 300.
Two planetary rows in the Ravigneaux planetary gear mechanism 1 share a planetary carrier and a gear ring 14, and a small sun gear 12, a short planetary gear 15, a long planetary gear 16, a common planetary carrier 13 and the gear ring 14 form a double planetary gear type planetary row. The large sun gear 11, the long planet gears 16, the common planet carrier 13 and the inner gear ring 14 form a single planet wheel type planet row. In the ravigneaux planetary gear mechanism 1, the large sun gear 11 is selectively coupled to the drive motor 200, the small sun gear 12 is locked, and the large sun gear 11 can be used as an input and the common carrier 13 can be used as an output.
Thus, the drive motor 200 of the electrically driven speed reducer 100 according to the present invention can be coupled with the large sun gear 11, and the drive motor 200 can also be coupled with the common carrier 13.
When the driving motor 200 is in power coupling connection with the large sun gear 11, the power of the driving motor 200 can be transmitted from the large sun gear 11 to the ravigneaux planetary gear mechanism 1, and transmitted through the short planetary gear 15, the long planetary gear 16 and the inner gear ring 14, and transmitted from the common planet carrier 13 to the differential 300, the differential 300 is connected with the wheel 400, the driving force output by the driving motor 200 can be transmitted to the wheel 400 connected with the differential 300 through the electrically-driven reducer 100, and then the wheel 400 connected with the differential 300 is driven to rotate, and in the power transmission process, the power is transmitted through the ravigneaux planetary gear mechanism 1, and the torque of the driving motor 200 is transmitted to the differential 300 in a speed reduction way;
when the driving motor 200 is coupled with the common planet carrier 13, the power of the driving motor 200 can be directly transmitted to the differential 300 through the common planet carrier 13, the differential 300 is connected with the wheels 400, the driving force output by the driving motor 200 can be transmitted to the wheels 400 connected with the differential 300 through the electrically-driven speed reducer 100 to further drive the wheels 400 connected with the differential 300 to rotate, and in the power transmission process, the power of the driving motor 200 is transmitted to the differential 300 through the common planet carrier 13, and the torque and the rotating speed of the driving motor 200 are not changed.
The single-gear electric-driven speed reducer has the problems of high energy consumption, high requirements on indexes such as motor rotating speed and torque and the like, and the electric-driven speed reducer 100 provided by the invention has the advantages that the two gears can be switched by the electric-driven speed reducer 100 by arranging the Ravigneaux planetary gear mechanism 1, so that the requirements on the indexes such as the motor rotating speed and the torque of the electric-driven speed reducer 100 are low, and the production cost of the electric-driven speed reducer 100 can be reduced.
The electrically-driven speed reducer 100 according to the present invention, through the provision of the ravigneaux planetary gear mechanism 1, enables the electrically-driven speed reducer 100 to output the power of the drive motor 200 at a reduced speed or at a constant speed, and has two selectable speed ratios for power output, thereby enhancing the applicability of the electrically-driven speed reducer 100, and having a simple structure and a low cost, and improving the power performance and the economy of a vehicle on which the electrically-driven speed reducer is mounted.
Some embodiments of an electrically driven retarder 100 according to the invention are described below with reference to fig. 1.
In some embodiments, the electrically-driven retarder 100 has a first gear mode of operation and a second gear mode of operation; in the first gear working mode, the large sun gear 11 is in power coupling connection with the driving motor 200, and the common planet carrier 13 is disconnected with the driving motor 200; in the second gear mode, the common carrier 13 is in power coupling connection with the driving motor 200, and the large sun gear 11 is disconnected from the driving motor 200.
When the electrically-driven speed reducer 100 is engaged in a first gear, the large sun gear 11 is in power coupling connection with the driving motor 200, the common planet carrier 13 is disconnected from the driving motor 200, the power of the driving motor 200 is transmitted to the large sun gear 11, transmitted to the Ravigneaux planetary gear mechanism 1 by the large sun gear 11, transmitted by the short planet gears 15, the long planet gears 16 and the inner gear ring 14, transmitted by the common planet carrier 13 to the differential 300, the differential 300 is connected with the wheel 400, the driving force output by the driving motor 200 can be transmitted to the wheel 400 connected with the differential 300 by the electrically-driven speed reducer 100 to further drive the wheel 400 connected with the differential 300 to rotate, and in the power transmission process, the power is transmitted to the differential 300 by the Ravigneaux planetary gear mechanism 1 to decelerate and transmit the torque of the driving motor 200 to the differential 300.
When the electrically-driven speed reducer 100 is in the second gear, the common planet carrier 13 is in power coupling connection with the driving motor 200, the large sun gear 11 is disconnected from the driving motor 200, the power of the driving motor 200 can be directly transmitted to the differential 300 through the common planet carrier 13, the differential 300 is connected with the wheels 400, the driving force output by the driving motor 200 can be transmitted to the wheels 400 connected with the differential 300 through the electrically-driven speed reducer 100 to further drive the wheels 400 connected with the differential 300 to rotate, in the power transmission process, the power of the driving motor 200 is transmitted to the differential 300 through the common planet carrier 13, and the torque and the rotating speed of the driving motor 200 are not changed.
Thus, the first gear and the second gear of the electrically driven speed reducer 100 are achieved, and in the first gear, the power of the drive motor 200 is transmitted to the differential 300 through the reduction of the ravigneaux planetary gear mechanism 1; in the second gear, the power of the driving motor 200 is directly transmitted to the differential 300 through the common planet carrier 13, i.e., the second gear is a direct gear; therefore, the first gear speed ratio of the electrically-driven speed reducer 100 is larger than the second gear speed ratio, i.e., the speed ratio u1 of the first gear is larger than the speed ratio u2 of the second gear.
The electrically-driven speed reducer 100 of the embodiment of the invention has the advantages that the first gear and the second gear are arranged, so that the electrically-driven speed reducer 100 can have a two-gear shifting structure, and the two-gear structure is adopted for the vehicle 2000 with large torque demand range, uncertain load and complex working conditions, so that the motor is ensured to operate in a high-efficiency area, and the electric energy is saved.
In some embodiments, as shown in FIG. 1, the electrically-driven retarder 100 further includes: a first clutch and a second clutch, wherein the first clutch comprises a first fixed part 211 and a first movable part 212, the first fixed part 211 is selectively connected with the first movable part 212, the second clutch comprises a second fixed part 221 and a second movable part 222, and the second fixed part 221 is selectively connected with the second movable part 222;
the first fixed part 211 of the first clutch is used for connecting with the driving motor 200, and the first movable part 212 of the first clutch is connected with the large sun gear 11; the second fixed part 221 of the second clutch is used for connecting with the driving motor 200, and the second movable part 222 of the second clutch is connected with the common carrier 13.
Thus, when the first fixed part 211 is connected to the first movable part 212, the driving motor 200 can be coupled to the large sun gear 11, and when the second fixed part 221 is connected to the second movable part 222, the driving motor 200 can be coupled to the common carrier 13.
In some embodiments, as shown in fig. 1, the first fixing portion 211 and the second fixing portion 221 are integrally provided, that is, the first fixing portion 211 and the second fixing portion 221 are integrated into one component, so that the first movable portion 212 or the second movable portion 222 can be selectively connected to the first fixing portion 211 or the second fixing portion 221 which is integrated into one body, and the power coupling connection between the driving motor 200 and the common carrier 13 or the large sun gear 11 can be achieved.
In some examples, the first clutch and the second clutch each have a steel plate and a friction plate, and the first fixed portion 211 and the first movable portion 212 may be connected or the second fixed portion 221 and the second movable portion 222 may be connected by engaging the steel plates with the friction plates, for example, the first fixed portion 211 includes a friction plate, the first movable portion 212 includes a steel plate, and the first fixed portion 211 and the first movable portion 212 may be connected by engaging the friction plate with the steel plates, for example, the friction plate clamps the steel plates, and of course, the second clutch may also be in this structural form, and will not be described herein again.
In some examples, the steel plates and friction plates of the first clutch may be used in common with the friction plates and steel plates of the second clutch, thereby saving manufacturing costs of the electric drive reducer 100, and having a simple structure for easy replacement and maintenance.
In some embodiments, the electrically-driven retarder 100 further includes: a first input shaft 31 and a second input shaft 32, the first input shaft 31 being connected with the large sun gear 11, and the first input shaft 31 being connected with the first movable portion 212, the second input shaft 32 being connected with the common carrier 13, and the second input shaft 32 being connected with the second movable portion 222, whereby the power of the driving motor 200 is transmitted to the electrically-driven speed reducer 100 through the first input shaft 31 or the second input shaft 32.
In some embodiments, as shown in fig. 1, the second input shaft 32 is a hollow shaft and is hollow and sleeved outside the first input shaft 31, so that the second input shaft 32 can be conveniently arranged and the assembly space can be saved.
As shown in fig. 2 and 5, the present invention further provides an electric drive axle powertrain 1000, comprising: the drive motor 200 and the electrically driven speed reducer 100 according to any embodiment of the invention, the drive motor 200 is in power coupling connection with the large sun gear 11.
The electric drive axle drive train 1000 according to the invention has corresponding advantages by providing the electrically driven reduction gear 100 according to the invention, which will not be described in detail here.
As shown in fig. 3 and 4, the present invention also proposes a vehicle 2000 including: an electric drive axle powertrain 1000 according to any embodiment of the present invention.
The vehicle 2000 according to the present invention has corresponding advantages by providing the electric drive axle powertrain 1000 according to the present invention, which will not be described in detail herein.
In some examples, the vehicle 2000 may be provided with one or more electric drive axle powertrains 1000, such as shown in fig. 3, and either the front drive vehicle 2000 or the rear drive vehicle 2000 may be equipped with one electric drive axle powertrain 1000; for example, as shown in fig. 3, two electric drive axle power assemblies 1000 may be provided for the four-wheel drive vehicle 2000, that is, the front drive axle employs the electric drive axle power assembly 1000 according to the present invention, and the rear drive axle employs the electric drive axle power assembly 1000 according to the present invention, so that the vehicle 2000 has various ways of adapting to the electric drive axle power assembly 1000, the electric drive axle power assembly 1000 may be more flexibly provided, and the vehicle 2000 mounted with the electric drive axle power assembly 1000 may adapt to various working conditions, thereby improving the trafficability and the power performance of the vehicle 2000.
In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features.
In the description of the present invention, "a plurality" means two or more.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (4)
1. An electrically driven speed reducer, comprising: the power coupling device comprises a Ravigneaux planetary gear mechanism, a driving motor, a differential mechanism and a planetary gear mechanism, wherein a large sun gear of the Ravigneaux planetary gear mechanism can be selectively in power coupling connection with the driving motor, a small sun gear of the Ravigneaux planetary gear mechanism is locked, a common planet carrier of the Ravigneaux planetary gear mechanism can be selectively in power coupling connection with the driving motor, and the common planet carrier is used for being connected with an input end of the differential mechanism;
the electrically-driven speed reducer is provided with a first gear working mode and a second gear working mode;
when the first gear working mode is adopted, the large sun gear is in power coupling connection with the driving motor, and the common planet carrier is disconnected with the driving motor;
in the second gear working mode, the common planet carrier is in power coupling connection with the driving motor, and the large sun gear is disconnected with the driving motor;
the first fixed part of the first clutch is used for being connected with the driving motor, and the first movable part of the first clutch is connected with the large sun gear;
a second fixed part of the second clutch is used for being connected with the driving motor, and a second movable part of the second clutch is connected with the common planet carrier;
the first input shaft is connected with the large sun gear and is connected with the first movable part;
the long planet wheel of the Ravigneaux planetary gear mechanism is arranged on the second input shaft, and the second input shaft is connected with the short planet wheel of the Ravigneaux planetary gear mechanism; the second input shaft is connected with the common planet carrier and the second input shaft is connected with the second movable part;
the second input shaft is a hollow shaft and is sleeved outside the first input shaft in a hollow mode.
2. The electrically driven speed reducer of claim 1, wherein the first and second stationary portions are integrally disposed.
3. An electric drive axle powertrain, comprising:
a drive motor;
the electric drive axle powertrain of any of claims 1-2, the drive motor being in power coupling connection with the large sun gear.
4. A vehicle, characterized by comprising: the electric drive axle powertrain of claim 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811639266.5A CN111376714B (en) | 2018-12-29 | 2018-12-29 | Electrically-driven speed reducer, electrically-driven axle power assembly and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811639266.5A CN111376714B (en) | 2018-12-29 | 2018-12-29 | Electrically-driven speed reducer, electrically-driven axle power assembly and vehicle |
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| Publication Number | Publication Date |
|---|---|
| CN111376714A CN111376714A (en) | 2020-07-07 |
| CN111376714B true CN111376714B (en) | 2022-04-15 |
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| CN103917803A (en) * | 2011-10-28 | 2014-07-09 | 日本精工株式会社 | Electric vehicle driving device |
| CN103465777A (en) * | 2013-07-22 | 2013-12-25 | 北京理工大学 | Double-differential electromechanical compound transmission device for crawler vehicle |
| CN104948685A (en) * | 2014-03-25 | 2015-09-30 | 西门子公司 | Transmission system with Ravigneaux set and vehicle |
| CN203926645U (en) * | 2014-04-30 | 2014-11-05 | 北京航空航天大学 | A kind of electrically driven (operated) planetary transmission |
| CN104265792A (en) * | 2014-08-06 | 2015-01-07 | 深圳市悦成汽车技术有限公司 | Clutch and vehicle variable speed assembly of hybrid vehicle |
| CN205401619U (en) * | 2016-03-02 | 2016-07-27 | 岭南师范学院 | Novel six grade high -efficient automatic gearbox drive mechanism |
| CN205383227U (en) * | 2016-03-21 | 2016-07-13 | 岭南师范学院 | Nine -gear automatic gearbox drive mechanism |
| DE102018100649A1 (en) * | 2018-01-12 | 2018-03-01 | FEV Europe GmbH | Drive unit for a vehicle with an electric motor and with a transmission |
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