CN111376714B - Electric drive reducer, electric drive axle powertrain, vehicle - Google Patents

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

Electric drive reducer, electric drive axle powertrain, vehicle

technical field

The invention belongs to the technical field of vehicle manufacturing, and in particular relates to an electric drive reducer, an electric drive axle power assembly and a vehicle.

Background technique

Hybrid vehicles, electric vehicles, and extended-range electric vehicles are the future development directions of automobiles and the main forms of new energy vehicles. In the related art, the electric drive reducer has complex structure, complex working mode and complicated control strategy, the energy conversion efficiency needs to be improved, the battery power cannot be fully utilized, the control is complicated, and the efficiency is low.

SUMMARY OF THE INVENTION

The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present invention is to provide an electric drive reducer.

The electric drive reducer according to the embodiment of the present invention includes: a Lavina planetary gear mechanism, the large sun gear of the Lavina planetary gear mechanism can be selectively coupled and connected to the drive motor, the Lavina planetary gear mechanism The small sun gear is locked, and the common planet carrier of the Lavina planetary gear mechanism can be selectively coupled and connected to the drive motor, and the common planet carrier is used for connecting with the input end of the differential.

The electric drive reducer according to the present invention is provided with the Lavina planetary gear mechanism, so that the electric drive reducer can output the power of the driving motor through deceleration or constant speed, and has two selectable speed ratios for power output, thereby enhancing the The applicability of the electric drive reducer is simple in structure and low in cost, and the power and economy of the vehicle equipped with the electric drive reducer are improved.

According to the electric drive reducer according to an embodiment of the present invention, the electric drive reducer has a first gear working mode and a second gear working mode; in the first gear working mode, the large sun gear and the The drive motor is coupled and connected in power, the common planet carrier is disconnected from the drive motor; in the second gear operating mode, the common planet carrier is coupled and connected with the drive motor, and the big sun The wheel is disconnected from the drive motor.

The electric drive reducer according to an embodiment of the present invention further includes: a first clutch, the first fixed part of the first clutch is used for connecting with the driving motor, and the first movable part of the first clutch is connected to the drive motor. the large sun gear is connected; the second clutch, the second fixed part of the second clutch is used for connecting with the driving motor, and the second movable part of the second clutch is connected with the common planet carrier.

According to the electric drive reducer according to an embodiment of the present invention, the first fixing part and the second fixing part are integrally provided.

The electric drive reducer according to an embodiment of the present invention further comprises: a first input shaft, the first input shaft is connected with the large sun gear, and the first input shaft is connected with the first movable part; A second input shaft, the second input shaft is connected with the common planet carrier, and the second input shaft is connected with the second movable part.

According to the electric drive reducer according to an embodiment of the present invention, the second input shaft is a hollow shaft and is sleeved outside the first input shaft.

The present invention also provides an electric drive axle power assembly, comprising: a drive motor and the electric drive axle power assembly according to any embodiment of the present invention, wherein the drive motor is powered with the first sun gear connect.

The electric drive axle power assembly has the same advantages as the above-mentioned electric drive reducer over the prior art, which will not be repeated here.

The present invention also provides a vehicle, including the electric drive axle powertrain according to the embodiment of the present invention.

The vehicle has the same advantages as the above-mentioned electric drive reducer and electric drive axle power assembly over the prior art, which will not be repeated here.

Additional aspects and advantages of the present invention will be set forth, in part, from the following description, and in part will be apparent from the following description, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of embodiments taken in conjunction with the accompanying drawings, wherein:

1 is a schematic structural diagram of an electric drive reducer according to an embodiment of the present invention;

2 is a schematic structural diagram of an electric drive axle powertrain according to an embodiment of the present invention;

3 is a schematic structural diagram of a vehicle according to an embodiment of the present invention;

4 is a schematic structural diagram of a vehicle according to another embodiment of the present invention;

FIG. 5 is a schematic structural diagram of an electric drive axle powertrain according to an embodiment of the present invention.

Reference number:

vehicle 2000;

Electric drive axle powertrain 1000;

Electric drive reducer 100; drive motor 200; differential 300; wheels 400;

Lavina planetary gear mechanism 1; large sun gear 11; small sun gear 12; common planetary carrier 13; ring gear 14; short planetary gear 15; long planetary gear 16;

The first fixed part 211; the first movable part 212; the second fixed part 221; the second movable part 222;

The first input shaft 31; the second input shaft 32.

Detailed ways

The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, only used to explain the present invention, and should not be construed as a limitation of the present invention.

The electric drive reducer 100 according to the embodiment of the present invention will be described below with reference to FIG. 1 .

The electric drive reducer 100 according to the present invention includes: a Ravina planetary gear mechanism 1, the large sun gear 11 of the Ravina planetary gear mechanism 1 can be selectively coupled and connected to the drive motor 200, and the Ravina planetary gear mechanism 1 The small sun gear 12 is locked, the common planetary carrier 13 of the Lavina planetary gear mechanism 1 can be selectively coupled and connected to the drive motor 200, the ring gear 14 is not locked, and the common planetary carrier 13 is used to connect with the differential 300. connected to the input.

In the Lavina planetary gear mechanism 1, the two planetary rows share the planet carrier and the ring gear 14. The small sun gear 12, the short planetary gear 15, the long planetary gear 16, the common planetary carrier 13 and the ring gear 14 form a double planetary gear planet. Row. The large sun gear 11, the long planetary gears 16, the common planetary carrier 13 and the ring gear 14 form a single planetary gear planetary row. In the Lavina planetary gear mechanism 1, the large sun gear 11 can be selectively coupled and connected to the drive motor 200, the small sun gear 12 is locked, and the large sun gear 11 can be used as the input and the common planet carrier 13 can be used as the output.

Thus, the drive motor 200 of the electric drive reducer 100 according to the present invention can be coupled and connected to the large sun gear 11 , and the drive motor 200 can also be coupled and connected to the common planetary carrier 13 .

When the driving motor 200 is coupled and connected with the large sun gear 11, the power of the driving motor 200 can be transmitted from the large sun gear 11 to the Lavina planetary gear mechanism 1, and passes through the short planetary gear 15, the long planetary gear 16, the inner gear The transmission of the ring 14 is transmitted from the common planet carrier 13 to the differential 300, the differential 300 is connected with the wheels 400, and the driving force output by the drive motor 200 can be transmitted to the wheels connected with the differential 300 through the electric drive reducer 100 400, and then drive the wheels 400 connected to the differential 300 to rotate. During the above power transmission process, the power is transmitted through the Lavina planetary gear mechanism 1, and the torque of the driving motor 200 is decelerated and transmitted to the differential 300;

When the driving motor 200 is coupled and connected to the common planetary carrier 13, the power of the driving motor 200 can be directly transmitted to the differential 300 through the common planetary carrier 13, the differential 300 is connected to the wheels 400, and the driving force output by the driving motor 200 can be The electric drive reducer 100 is transmitted to the wheels 400 connected to the differential 300, and then drives the wheels 400 connected to the differential 300 to rotate. During the above power transmission process, the power of the driving motor 200 is transmitted from the common planetary carrier 13 to In the differential 300, the torque and rotation speed of the drive motor 200 are not changed.

The single-speed electric drive reducer has the problems of high energy consumption and high requirements for indicators such as motor speed and torque, and the electric drive reducer 100 in the present invention is provided with the Lavina planetary gear mechanism 1, so that the electric drive reducer 100 can perform two operations. The switching of the gears makes the electric drive reducer 100 have lower requirements on indicators such as motor speed and torque, thereby reducing the production cost of the electric drive reducer 100 .

The electric drive reducer 100 according to the present invention is provided with the Lavina planetary gear mechanism 1, so that the electric drive reducer 100 can output the power of the driving motor 200 through deceleration or constant speed, and has two selectable speed ratios for power Therefore, the applicability of the electric drive decelerator 100 is enhanced, the structure is simple, the cost is low, and the power performance and economy of the vehicle equipped with the electric drive decelerator are improved.

Some embodiments of the electric drive reducer 100 according to the present invention will be described below with reference to FIG. 1 .

In some embodiments, the electric drive reducer 100 has a first gear working mode and a second gear working mode; in the first gear working mode, the large sun gear 11 is coupled and connected to the drive motor 200 in power, and the common planet carrier 13 is disconnected from the drive motor 200 ; in the second gear operating mode, the common planet carrier 13 is dynamically coupled and connected to the drive motor 200 , and the large sun gear 11 is disconnected from the drive motor 200 .

When the electric drive reducer 100 is engaged in the first gear, the large sun gear 11 is coupled and connected to the drive motor 200, the common planet carrier 13 is disconnected from the drive motor 200, and the power of the drive motor 200 is transmitted to the large sun gear 11, and is driven by the large sun gear 11. The sun gear 11 is transmitted to the Lavina planetary gear mechanism 1, and is transmitted through the short planetary gear 15, the long planetary gear 16, and the ring gear 14, and is transmitted by the common planetary carrier 13 to the differential 300. The differential 300 and the The wheels 400 are connected, and the driving force output by the driving motor 200 can be transmitted to the wheels 400 connected to the differential 300 through the electric drive reducer 100, and then drive the wheels 400 connected to the differential 300 to rotate. During the above power transmission process, The power is transmitted through the Lavina planetary gear mechanism 1 , and the torque of the drive motor 200 is decelerated and transmitted to the differential 300 .

When the electric drive reducer 100 is in the second gear, the common planet carrier 13 is coupled and connected to the drive motor 200, the large sun gear 11 is disconnected from the drive motor 200, and the power of the drive motor 200 can be directly transmitted to the differential gear through the common planet carrier 13. The differential 300 is connected to the wheels 400 , and the driving force output by the drive motor 200 can be transmitted to the wheels 400 connected to the differential 300 through the electric drive reducer 100 , thereby driving the wheels 400 connected to the differential 300 During the above-mentioned power transmission process, the power of the driving motor 200 is transmitted to the differential 300 from the common planetary carrier 13, and the torque and rotation speed of the driving motor 200 remain unchanged.

Thus, the first gear and the second gear of the electric reducer 100 are driven. In the first gear, the power of the driving motor 200 is transmitted to the differential 300 through the deceleration of the Lavina planetary gear mechanism 1; in the second gear, the drive The power of the motor 200 is directly transmitted to the differential 300 through the common planetary carrier 13, that is, the second gear is a direct gear; so that the first gear ratio of the electric drive reducer 100 is larger than the second gear ratio, that is, the first gear The speed ratio u1 > The speed ratio u2 of the second gear.

In the electric drive reducer 100 of the embodiment of the present invention, by setting the first gear and the second gear, the electric drive reducer 100 can have a two-gear shifting structure, which is suitable for vehicles with a large torque demand range, uncertain loads and complex working conditions. 2000, the structure of two gears is adopted, which ensures that the motor runs in the high-efficiency area and saves electricity.

In some embodiments, as shown in FIG. 1 , the electric drive reducer 100 further includes: a first clutch and a second clutch, the first clutch includes a first fixed part 211 and a first movable part 212 , and the first fixed part 211 is connected to The first movable part 212 can be selectively connected, the second clutch includes a second fixed part 221 and a second movable part 222, and the second fixed part 221 and the second movable part 222 can be selectively connected;

The first fixed part 211 of the first clutch is used for connecting with the driving motor 200 , 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 . Connected, the second movable portion 222 of the second clutch is connected with the common planet carrier 13 .

Therefore, when the first fixed part 211 is connected with the first movable part 212, the driving motor 200 can be coupled and connected with the large sun gear 11, and when the second fixed part 221 is connected with the second movable part 222, the driving motor 200 can be driven The motor 200 is coupled and connected to the common planetary carrier 13 .

In some embodiments, as shown in FIG. 1 , the first fixing part 211 and the second fixing part 221 are integrally arranged, that is, the first fixing part 211 and the second fixing part 221 are integrated into one component, thereby, the first movable part is The part 212 or the second movable part 222 can be selectively connected with the integrated first fixed part 211 or the second fixed part 221, so as to realize the power coupling connection between the drive motor 200 and the common planet carrier 13 or the large sun gear 11 .

In some examples, both the first clutch and the second clutch have steel plates and friction plates, and the steel plates and the friction plates can be matched to connect the first fixed part 211 to the first movable part 212 or to connect the second fixed part 221 to the friction plate. The second movable part 222 is connected, for example, the first fixed part 211 includes a friction plate, and the first movable part 212 includes a steel plate, so that the friction plate and the steel plate are matched, for example, the friction plate clamps the steel plate to realize the first fixed part 211 In connection with the first movable portion 212, of course, the second clutch can also be in this structural form, which will not be repeated here.

In some examples, the steel plates and friction plates of the first clutch may be the same as those of the second clutch, so that the manufacturing cost of the electric drive reducer 100 can be saved, and the structure is simple and easy to replace and maintain.

In some embodiments, the electric drive reducer 100 further includes: a first input shaft 31 and a second input shaft 32 , the first input shaft 31 is connected to the large sun gear 11 , and the first input shaft 31 is connected to the first movable part 212 The second input shaft 32 is connected with the common planet carrier 13, and the second input shaft 32 is connected with the second movable part 222, so that the power of the driving motor 200 is transmitted through the first input shaft 31 or the second input shaft 32 to the electric drive reducer 100.

In some embodiments, as shown in FIG. 1 , the second input shaft 32 is a hollow shaft and is hollowly sleeved outside the first input shaft 31 , thereby facilitating the arrangement of the second input shaft 32 and saving assembly space.

As shown in FIG. 2 and FIG. 5 , the present invention further proposes an electric drive axle powertrain 1000, including: a drive motor 200 and an electric drive reducer 100 according to any embodiment of the present invention, the drive motor 200 and the large sun The wheel 11 is connected with power coupling.

The electric drive axle powertrain 1000 according to the present invention has corresponding advantages by providing the electric drive reducer 100 according to the present invention, which will not be repeated here.

As shown in FIG. 3 and FIG. 4 , the present invention further provides a vehicle 2000 including: the 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 repeated here.

In some examples, the vehicle 2000 may be provided with one or more electric transaxle powertrains 1000, such as shown in FIG. As shown, the four-wheel drive vehicle 2000 can be provided with two electric drive axle powertrains 1000, that is, the front drive axle adopts the electric drive axle powertrain 1000 according to the present invention, and the rear drive axle adopts the electric drive axle powertrain according to the present invention. 1000, so that the vehicle 2000 has a variety of ways to adapt the electric drive axle powertrain 1000, so that the setting of the electric drive axle powertrain 1000 can be more flexible, and the vehicle 2000 with the electric drive axle powertrain 1000 can be installed. Adapt to a variety of working conditions, improve the passability and dynamic performance of the vehicle 2000.

In the description of the present invention, "first feature" and "second feature" may include one or more of the features.

In the description of the present invention, "plurality" means two or more.

In the description of this specification, reference to the terms "one embodiment," "some embodiments," "exemplary embodiment," "example," "specific example," or "some examples", etc., is meant to incorporate the embodiments A particular feature, structure, material, or characteristic described by an example or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms 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.

Although embodiments of the present 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 in these embodiments without departing from the principles and spirit of the invention, The scope of the invention is defined by the claims and their equivalents.

Claims (4)

1. An electric drive reducer, characterized in that it comprises: a Lavina planetary gear mechanism, the large sun gear of which The small sun gear of the planetary gear mechanism is locked, and the common planet carrier of the Lavina planetary gear mechanism can be selectively coupled to the drive motor for power coupling, and the common planet carrier is used for connecting with the input of the differential. ; The electric drive reducer has a first gear working mode and a second gear working mode; In the working mode of the first gear, the large sun gear is dynamically coupled and connected to the drive motor, and the common planet carrier is disconnected from the drive motor; In the working mode of the second gear, the common planet carrier is dynamically coupled and connected to the drive motor, and the large sun gear is disconnected from the drive motor; a first clutch, the first fixed part of the first clutch is used for connecting with the driving motor, and the first movable part of the first clutch is connected with the large sun gear; a second clutch, the second fixed part of the second clutch is used for connecting with the driving motor, and the second movable part of the second clutch is connected with the common planet carrier; a first input shaft, the first input shaft is connected with the large sun gear, and the first input shaft is connected with the first movable part; the second input shaft, the long planetary gear of the Lavina planetary gear mechanism is arranged on the second input shaft, and the second input shaft is connected with the short planetary gear of the Lavina planetary gear mechanism; the 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. 2 . The electric drive reducer according to claim 1 , wherein the first fixing part and the second fixing part are integrally arranged. 3 . 3. An electric drive axle powertrain, characterized in that, comprising: motor; The electric drive axle power assembly according to any one of claims 1-2, wherein the drive motor is coupled and connected to the large sun gear. 4. A vehicle, characterized by comprising: the electric drive axle powertrain as claimed in claim 3.

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