WO2023206717A1

WO2023206717A1 - Multi-gear speed-change electric drive axle and electric vehicle

Info

Publication number: WO2023206717A1
Application number: PCT/CN2022/097257
Authority: WO
Inventors: 李杉; 邓跃跃; 闫宏翔
Original assignee: 特百佳动力科技有限公司
Priority date: 2022-04-25
Filing date: 2022-06-07
Publication date: 2023-11-02
Also published as: CN114670619B; CN114670619A

Abstract

A multi-gear speed-change system electric drive axle for a new energy vehicle, comprising a driving assembly (1), a power coupling gear (2), a first gear transmission assembly (3), a differential (4), a first half shaft (5), and a second half shaft (6). The driving assembly (1) is used for driving the differential (4) and comprises a first motor (7) and a first speed-change mechanism (8) transmittingly connected to the first motor (7).

Description

A multi-speed electric drive axle and electric vehicle

Technical field

The invention relates to the field of vehicle technology, and in particular to a multi-speed electric drive axle and an electric vehicle.

Background technique

The multi-speed transmission system of new energy vehicles. The electric drive axle is a vehicle transmission system. The transmission system is an important part of the electric drive axle. The main task of the transmission system is to transfer the power from the drive motor or other equipment through meshing gear transmission. Mechanisms such as gear meshing can achieve deceleration and torque increase or direct drive power output, thereby driving the movement and operation of vehicles or other transportation machinery, allowing the vehicle to obtain a certain speed, provide sufficient traction, and have high efficiency. With the continuous development of science and technology, people have higher and higher requirements for the manufacturing process of electric drive axles of multi-speed transmission systems of new energy vehicles.

There are certain drawbacks in the use of existing multi-gear transmission systems of electric drive axles for new energy vehicles. Most electric drive axle transmission systems on the market now have a single speed ratio, which can only provide a single power flow mode and cannot take into account speed at the same time. And traction, there is only one speed ratio, and only one power flow. If the speed ratio is set smaller, the required vehicle speed can be obtained, but the traction force for climbing will be insufficient; if a larger speed ratio is set, the vehicle speed will be lower and the impact will be affected. Efficiency, and some existing electric drive axles on the market are equipped with two-speed transmission systems. Although they can provide two power flow modes, they can only meet the high requirements of some working conditions for long-distance traction vehicles with changing road conditions and changing loads. Due to efficiency requirements, there will also be many working conditions where vehicle speed, traction and high efficiency cannot be taken into consideration, which has a certain adverse impact on people's use. For this reason, we propose a multi-speed transmission system for new energy vehicles. Electrically driven axle.

Contents of the invention

In view of the shortcomings of the existing technology, the present invention provides a multi-speed electric drive axle and an electric vehicle. The transmission system has an innovative structural design layout and effectively combines the two transmission modules at the front and rear of the axle housing through a coupling gear mechanism. , which can effectively solve the problems in the background technology.

In order to achieve the above object, the technical solution adopted by the present invention is: a multi-speed electric drive axle, including a drive assembly, a power coupling gear, a first gear transmission assembly, a differential, a first half shaft and a second half shaft, The drive assembly is used to drive the differential. The drive assembly includes a first motor and a first transmission mechanism that is transmission connected to the first motor. The power coupling gear is provided on the first half shaft or the second half shaft. On the half shaft, the first transmission mechanism is drivingly connected to the first gear transmission assembly through the power coupling gear, and the first gear transmission assembly is drivingly connected to the differential. The first gear transmission assembly Includes second transmission mechanism.

As a preferred technical solution of the present application, the first transmission mechanism and the second transmission mechanism each include a planetary gear mechanism or a plurality of first gear pairs.

As a preferred technical solution of the present application, the driving assembly includes a sliding sleeve shifting mechanism, the sliding sleeve of the sliding sleeve shifting mechanism is provided on the output shaft of the driving assembly, and the first transmission mechanism is a planetary gear shifting mechanism. gear mechanism;

When the electric drive axle is in the low-speed mode, the first sliding sleeve shift mechanism is drivingly connected to the planet carrier of the planetary gear mechanism;

When the electric drive axle is in the high-speed mode, the first sliding sleeve shift mechanism is drivingly connected to the central shaft of the planetary gear mechanism.

As a preferred technical solution of the present application, the first gear transmission assembly includes a first intermediate shaft and a first transmission shaft, and the second transmission mechanism includes two first gear pairs, each of the first gear pairs The two gears are respectively provided on the first intermediate shaft and the first transmission shaft;

The second speed change mechanism includes a second sliding sleeve shift mechanism, the sliding sleeve of the second sliding sleeve shift mechanism is provided on the first transmission shaft, and the second sliding sleeve shift mechanism is used to communicate with both sides. A transmission connection in one of the first gear pairs;

At least one half shaft of the differential is provided with a second gear pair, and the first intermediate shaft is drivingly connected to the differential through the second gear pair.

As a preferred technical solution of the present application, the driving assembly further includes a second intermediate shaft and a second gear provided on the second intermediate shaft, the output shaft of the driving assembly is provided with a first gear, and the The second gear meshes with the first gear and the power coupling gear respectively, the first intermediate shaft is provided with a third gear, and the first transmission shaft is provided with a fourth gear that meshes with the third gear. , the third gear is also meshed with the power coupling gear.

As a preferred technical solution of the present application, the driving assembly and the first gear transmission assembly are respectively provided on opposite sides of the power coupling gear.

As a preferred technical solution of the present application, the driving assembly includes a first motor and a second motor, the first motor is drivingly connected to the first transmission mechanism, and the second motor is connected to the output shaft of the driving assembly. Transmission connection.

As a preferred technical solution of the present application, the electric drive axle further includes a shift control unit electrically connected to the first sliding sleeve shift mechanism and the second sliding sleeve shift mechanism. The shift control unit uses In the low speed mode, the sliding sleeve of the first sliding sleeve shift mechanism is controlled to be drivingly connected to the planet carrier of the planetary gear mechanism; in the high speed mode, the sliding sleeve of the first sliding sleeve shift mechanism is controlled. The sleeve is transmission connected with the central shaft of the planetary gear mechanism, and the shift control unit is also used to control the sliding sleeve of the second sliding sleeve shift mechanism to be transmission connected with one of the two first gear pairs.

As a preferred technical solution of the present application, any of the above-mentioned multi-speed electric drive axles are applicable to electric vehicles.

Compared with the existing technology, the present invention provides a multi-speed variable speed electric drive axle and an electric vehicle, which have the following beneficial effects: the multi-speed variable speed electric drive axle and the electric vehicle can enable the electric vehicle to obtain optimized vehicle speed and traction force And efficiency balance, to maximize the requirements for traction, speed and efficiency in various working conditions such as light load, heavy load, flat road operation, slope operation, etc., reduce energy consumption and increase efficiency.

Description of drawings

Figure 1 is a schematic diagram of the overall structure of a multi-speed variable speed electric drive axle according to the present invention;

Figure 2 is a schematic structural diagram of the I-speed power transmission route of the multi-speed electric drive axle in the embodiment of the present invention;

Figure 3 is a schematic structural diagram of the II gear power transmission route of the multi-speed electric drive axle in the embodiment of the present invention;

Figure 4 is a schematic structural diagram of the III-speed power transmission route of the multi-speed electric drive axle in the embodiment of the present invention;

Figure 5 is a schematic structural diagram of the IV gear power transmission route of the multi-speed electric drive axle in the embodiment of the present invention;

Figure 6 is a schematic structural diagram of the first sliding sleeve shifting mechanism in the multi-speed electric drive axle in the embodiment of the present invention.

Figure 7 is a schematic structural diagram of the second sliding sleeve shift mechanism in the multi-speed electric drive axle in the embodiment of the present invention.

Explanation of reference signs: 1. Drive component; 2. Power coupling gear; 3. First gear transmission component; 4. Differential; 5. First half-shaft; 6. Second half-shaft; 7. First motor; 8. First transmission mechanism; 9. Second transmission mechanism; 10. Planetary gear mechanism; 11. First gear pair; 12. First sliding sleeve shift mechanism; 13. Drive assembly output shaft; 14. First intermediate shaft ; 15. The first transmission shaft; 16. The second sliding sleeve shifting mechanism; 17. The second gear pair; 18. The second intermediate shaft; 19. The second gear; 20. The first gear; 21. The third gear; 22. Fourth gear; 23. Second motor; 24. Shift fork; 25. Sliding sleeve.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and specific implementation modes. However, those skilled in the art will understand that the following described embodiments are some of the embodiments of the present invention, rather than all of them. They are only used to illustrate the invention and should not be construed as limiting the scope of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention. If the specific conditions are not specified in the examples, the conditions should be carried out according to the conventional conditions or the conditions recommended by the manufacturer. If the manufacturer of the reagents or instruments used is not indicated, they are all conventional products that can be purchased commercially.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation or a specific orientation. construction and operation, and therefore should not be construed as limitations of the invention. Furthermore, the terms “first”, “second” and “third” are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise clearly stated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection. Connection, or integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.

As shown in Figure 1-7, a multi-speed electric drive axle includes a drive assembly 1, a power coupling gear 2, a first gear transmission assembly 3, a differential 4, a first half shaft 5 and a second half shaft 6 , the drive assembly 1 is used to drive the differential 4. The drive assembly 1 includes a first motor 7 and a first transmission mechanism 8 that is transmission connected to the first motor 7. The power coupling gear 2 is located on the first half shaft 5 or the second half shaft. On the shaft 6, in this embodiment, the power coupling gear 2 is provided on the second half shaft 6, the first transmission mechanism 8 is transmission connected to the first gear transmission assembly 3 through the power coupling gear 2, and the first gear transmission assembly 3 is connected to the differential The first gear transmission assembly 3 includes a second transmission mechanism 9 .

The driving assembly 1 drives the position of the differential 4, and is equipped with a motor and a transmission mechanism inside. At least one half shaft of the differential 4 is provided with a power coupling gear 2, which is connected to the transmission assembly through the power coupling gear 2 to drive the transmission. The transmission component is also equipped with a transmission mechanism. The innovative structural design layout of the transmission system effectively combines the two transmission modules at the front and rear of the axle housing through a coupling gear mechanism to form a multi-speed gear transmission system to achieve a variety of power. The flow transfer mode, matched with the motor, is applied to the electric drive axle assembly of commercial vehicles.

Specifically in this embodiment, the first transmission mechanism 8 and the second transmission mechanism 9 both include a planetary gear mechanism 10 or two first gear pairs 11. The driving assembly 1 includes a sliding sleeve shift mechanism. The sliding sleeve shift mechanism Sleeved on the output shaft 13 of the driving assembly, the first transmission mechanism 8 is a planetary gear mechanism 10. When the electric drive axle is in the low speed mode, the first sliding sleeve shift mechanism 12 and the planet carrier transmission of the planetary gear mechanism 10 connection, when the electric drive axle is in the high-speed mode, the first sliding sleeve shift mechanism 12 is drivingly connected to the central shaft of the planetary gear mechanism 10 .

The structural design and layout of the transmission assembly, gear pair and planetary gear mechanism 10 can enlarge the speed ratio range and realize a high-speed and low-torque motor drive scheme to reduce weight and hardware costs. The transmission mechanisms at both ends are distributed on the axle housing. The front and rear sides of the body make the weight on both sides of the axle housing more balanced and the stress on the load-bearing body is improved.

Further, the first gear transmission assembly 3 includes a first intermediate shaft 14 and a first transmission shaft 15. The second transmission mechanism 9 includes two first gear pairs 11, and the two gears of each first gear pair 11 are respectively provided at On the first intermediate shaft 14 and the first transmission shaft 15, the second transmission mechanism 9 includes a second sliding sleeve shift mechanism 16. The sliding sleeve of the second sliding sleeve shift mechanism 16 is provided on the first transmission shaft 15. The sliding sleeve shift mechanism 16 is used for transmission connection with one of the two first gear pairs 11. At least one half shaft of the differential 4 is provided with a second gear pair 17. The first intermediate shaft 14 is connected to the second gear pair 17 through the second gear pair 17. The differential 4 is transmission connected. The drive assembly 1 also includes a second intermediate shaft 18 and a second gear 19 provided on the second intermediate shaft 18. The first gear 20 is provided on the output shaft 13 of the drive assembly. The second gears 19 are respectively Mesh with the first gear 20 and the power coupling gear 2. The first intermediate shaft 14 is provided with a third gear 21. The first transmission shaft 15 is provided with a fourth gear 22 that meshes with the third gear 21. The third gear 21 is also provided with The power coupling gear 2 meshes. The drive assembly 1 and the first gear transmission assembly 3 are respectively located on opposite sides of the power coupling gear 2. The drive assembly 1 includes a first motor 7 and a second motor 23. The first motor 7 and a first transmission mechanism 8 transmission connection, the second motor 23 is transmission connection with the drive assembly output shaft 13.

It forms a multi-gear gear transmission system to realize multiple power flow transmission modes. When matched with the motor, it is applied to the electric drive axle assembly of commercial vehicles, which can enable electric commercial vehicles to obtain the optimal balance of speed, traction and efficiency to the maximum extent. It can fully meet the requirements for traction, speed and efficiency of various working conditions such as light load, heavy load, flat road operation, slope operation, etc., reduce energy consumption and increase efficiency.

Further, the electric drive axle also includes a shift control unit electrically connected to the first sliding sleeve shift mechanism 12 and the second sliding sleeve shift mechanism 16. The shift control unit is used to control the first sliding sleeve shift mechanism in the low speed mode. The sliding sleeve of the gear mechanism 12 is drivingly connected to the planet carrier of the planetary gear mechanism 10. In the high-speed mode, the sliding sleeve of the first sliding sleeve shifting mechanism 12 is drivingly connected to the central shaft of the planetary gear mechanism 10. The shift control unit also uses The sliding sleeve used to control the second sliding sleeve shifting mechanism 16 is drivingly connected to one of the two first gear pairs 11 .

Furthermore, the variable speed electric drive axle including any of the above items is suitable for new energy vehicles.

Example:

As shown in Figure 1-7, it includes a drive assembly 1, a power coupling gear 2, a first gear transmission assembly 3, a differential 4, a first half shaft 5 and a second half shaft 6. The drive assembly 1 is used to drive the differential. The drive assembly 1 includes a first motor 7 and a first transmission mechanism 8 that is transmission connected to the first motor 7. The power coupling gear 2 is provided on the first half shaft 5 or the second half shaft 6. In this embodiment, The power coupling gear 2 is provided on the second half shaft 6. The first transmission mechanism 8 is transmission connected to the first gear transmission assembly 3 through the power coupling gear 2. The first gear transmission assembly 3 is transmission connection to the differential 4. The first gear The transmission assembly 3 includes a second transmission mechanism 9. The first transmission mechanism 8 and the second transmission mechanism 9 each include a planetary gear mechanism 10 or a plurality of first gear pairs 11. The driving assembly 1 includes a sliding sleeve shifting mechanism. The sliding sleeve shifting mechanism The sliding sleeve of the mechanism is arranged on the output shaft 13 of the drive assembly. The first transmission mechanism 8 is a planetary gear mechanism 10. The electric drive axle also includes a shift control unit electrically connected to the sliding sleeve shift mechanism. The shift control unit also uses The sliding sleeve used to control the second sliding sleeve shifting mechanism 16 is drivingly connected to one of the two first gear pairs 11 .

1. As shown in Figure 2-3, when the electric drive axle is in the low-speed mode, the first sliding sleeve shift mechanism 12 is drivingly connected to the planet carrier of the planetary gear mechanism 10, and the shift control unit is used to control the The sliding sleeve of the first sliding sleeve shift mechanism 12 is drivingly connected to the planet carrier of the planetary gear mechanism 10; decelerating and increasing the torque input form a low-speed gear, forming I gear and II gear.

2. As shown in Figure 4-5, when the electric drive axle is in the high-speed mode, the first sliding sleeve shifting mechanism 12 is drivingly connected to the central shaft of the planetary gear mechanism 10. In the high-speed mode, the first sliding sleeve shifting mechanism is controlled. The sliding sleeve of the mechanism 12 is drivingly connected to the central shaft of the planetary gear mechanism 10 to form a high-speed gear, forming III gear and IV gear; the shifter is connected to the shift fork, and the shifter is used to drive the shift fork to move. The first sliding sleeve shifting mechanism 12 switches between different gears.

The 2X2 four-speed transmission system enables the electric drive axle to achieve multiple power output modes.

The cargo loading capacity of commercial vehicles varies widely, the transportation mileage varies, and the transportation road conditions are diverse. The requirements for vehicle speed and traction are also diverse. At the same time, they also require high operating efficiency to save energy and increase efficiency. The design of multi-speed electric drive axles and electric vehicles should try to meet the diverse operating conditions of commercial vehicles in terms of space layout and performance requirements. For example, large traction is required when climbing hills and sufficient traction is needed; for example, transportation time needs to be reduced. At the same time, the required vehicle speed can be obtained and transportation efficiency improved; at the same time, operating efficiency can be improved as much as possible under various working conditions. This requires that the structure of the electric drive axle and its transmission system be simple and reasonable, the number of gears should be appropriately set, and the selection of the speed ratio should be fully reasonable to cope with the requirements for traction and vehicle speed under different transportation conditions, and at the same time operate efficiently to reduce energy consumption.

An exemplary structural diagram of a sliding sleeve shift mechanism is shown in Figure 6; the sliding sleeve shift mechanism includes a sliding sleeve 25. The sliding sleeve 25 is sleeved on the gear through splines. One end of the shift fork is connected to The sliding sleeve 25 is connected so that the sliding sleeve 25 slides between the engaging teeth of the output shaft 13 of the drive assembly and the engaging teeth of the planet carrier of the planetary gear mechanism 10 . The outer surface of the sliding sleeve 25 is provided with external teeth, and the inner surface is provided with internal teeth; the inner surface of the planetary gear mechanism 10 is provided with internal teeth, and the outer surface of the drive assembly output shaft 13 is provided with external teeth. When the sliding sleeve 25 slides to the required In the transmission position, the external or internal teeth of the sliding sleeve 25 can mesh with the engagement teeth of the planetary gear mechanism 10 or the drive assembly output shaft 13 for power transmission.

Optionally, refer to an exemplary structural diagram of a sliding sleeve shift mechanism shown in Figure 7; the second sliding sleeve shift mechanism 16 includes a sliding sleeve 25, which is sleeved on the shaft through splines, so that The sliding sleeve 25 slides between the engaging teeth of the gear and the engaging teeth of the gear. The outer surface of the sliding sleeve 25 is provided with external teeth, and the inner surfaces of the gear and the gear are provided with internal teeth; when the sliding sleeve 25 slides to the position where transmission is required , the external teeth of the sliding sleeve 25 can mesh with the gear or the engaging teeth of the gear for power transmission.

In order to meet the functions of stroke and parking brake, the axle housing should also have the structure and interface for installing brakes, brake chambers, mounting brackets and ABS sensor components;

In order to meet the load-bearing function, the electric drive axle needs to be connected to the vehicle frame, and the electric drive axle housing should have a vehicle suspension system installation structure and interface.

It can be seen from the above that the transmission system of the electric drive axle of the multi-speed transmission system of the present disclosure adopts a 2X2=4 four-speed design. The three transmission modules form a power coupling and transmission power. Each module can be independent of each other or highly integrated. The four-speed transmission setting optimizes and satisfies the needs of electric commercial vehicles for electric drive axles in terms of speed ratio and power flow mode to the greatest extent possible, and best meets the balanced needs of commercial vehicles for traction, vehicle speed, and high operating efficiency, which is especially beneficial for long-distance driving. Tow vehicle.

In one embodiment of the present disclosure, the input power may be a permanent magnet synchronous motor or a switched reluctance motor.

It should be noted that the multi-speed transmission system of the present disclosure can be applied to the electric drive axle assembly of commercial vehicles, and can also be applied to the electric drive axles of other transportation vehicles with similar functions to electric commercial vehicles.

In summary, the electric drive axle of the multi-speed transmission system of the present disclosure can choose to set different specific speed ratios according to different vehicles, different working conditions and loads, so as to achieve the optimal power and torque transmission of the vehicle and meet the traction requirements of the vehicle. , speed and efficiency requirements to achieve the lowest vehicle energy consumption requirements.

The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above. Those skilled in the industry should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will also have other aspects. Various changes and modifications are possible, which fall within the scope of the claimed invention.

Claims

A multi-speed electric drive axle, characterized by: including a drive assembly (1), a power coupling gear (2), a first gear transmission assembly (3), a differential (4), and a first half shaft (5) With the second half shaft (6), the driving assembly (1) is used to drive the differential (4). The driving assembly (1) includes a first electric motor (7) and an electric motor (7) connected to the first electric motor (7). 7) The first transmission mechanism (8) of transmission connection, the power coupling gear (2) is sleeved on the first half shaft (5) or the second half shaft (6), the first transmission mechanism (8) The power coupling gear (2) is drivingly connected to the first gear transmission assembly (3), the first gear transmission assembly (3) is drivingly connected to the differential (4), and the first gear The transmission assembly (3) includes a second speed change mechanism (9).
The multi-speed electric drive axle according to claim 1, characterized in that: the first transmission mechanism (8) and the second transmission mechanism (9) each include a planetary gear mechanism (10) or a plurality of first gear pairs. (11).
The multi-speed electric drive axle according to claim 1, characterized in that: the drive assembly (1) includes a first sliding sleeve shift mechanism (12), and the first sliding sleeve shift mechanism (12) The sliding sleeve is provided on the output shaft (13) of the driving assembly, and the first transmission mechanism (8) is a planetary gear mechanism (10);

When the electric drive axle is in the low-speed mode, the first sliding sleeve shift mechanism (12) is drivingly connected to the planet carrier of the planetary gear mechanism (10);

When the electric drive axle is in the high-speed mode, the first sliding sleeve shift mechanism (12) is drivingly connected to the central shaft of the planetary gear mechanism (10).
The multi-speed electric drive axle according to claim 1, characterized in that: the first gear transmission assembly (3) includes a first intermediate shaft (14) and a first transmission shaft (15), and the second speed change The mechanism (9) includes two first gear pairs (11). The two gears of each first gear pair (11) are respectively provided on the first intermediate shaft (14) and the first transmission shaft (15). superior;

The second speed change mechanism (9) includes a second sliding sleeve shift mechanism (16). The sliding sleeve of the second sliding sleeve shift mechanism (16) is provided on the first transmission shaft (15). The second sliding sleeve shifting mechanism (16) is used for transmission connection with one of the two first gear pairs (11);

At least one half shaft of the differential (4) is provided with a second gear pair (17), and the first intermediate shaft (14) is drivingly connected to the differential (4) through the second gear pair (17). .
The multi-speed electric drive axle according to claim 4, characterized in that: the drive assembly (1) further includes a second intermediate shaft (18) and a second intermediate shaft (18) provided on the second intermediate shaft (18). Gear (19), a first gear (20) is provided on the output shaft (13) of the driving assembly (1), and the second gear (19) is connected to the first gear (20) and the power respectively. The coupling gear (2) meshes, the first intermediate shaft (14) is provided with a third gear (21), and the first transmission shaft (15) is provided with a fourth gear meshing with the third gear (21). Gear (22), the third gear (21) is also meshed with the power coupling gear (2).
The multi-speed electric drive axle according to claim 1, characterized in that the drive assembly (1) and the first gear transmission assembly (3) are respectively located on opposite sides of the power coupling gear (2). .
The multi-speed electric drive axle according to claim 1, characterized in that: the driving assembly (1) includes a first motor (7) and a second motor (23), and the first motor (7) and the The first speed change mechanism (8) is transmission connected, and the second motor (23) is transmission connected with the drive assembly output shaft (13).
The multi-speed electric drive axle according to claim 3, characterized in that: the electric drive axle further includes a shift control unit electrically connected to the sliding sleeve shift mechanism, and the shift control unit is used to control the In the low speed mode, the sliding sleeve of the first sliding sleeve shift mechanism (12) is controlled to be drivingly connected to the planet carrier of the planetary gear mechanism (10). In the high speed mode, the first sliding sleeve shift mechanism is controlled. The sliding sleeve of (12) is drivingly connected to the central shaft of the planetary gear mechanism (10), and the shift control unit is also used to control the sliding sleeve of the second sliding sleeve shift mechanism (16) and the two One transmission connection in the first gear pair (11).
An electric vehicle, characterized by: including the multi-speed electric drive axle according to any one of claims 1-8.