CN110654167A

CN110654167A - Electric drive axle

Info

Publication number: CN110654167A
Application number: CN201911061957.6A
Authority: CN
Inventors: 周强; 占秋平; 刘翰东; 朱登科; 王群; 刘军; 李万平; 秦偲玻; 杜亚君
Original assignee: Chongqing Jianfeng Automobile Technology Co Ltd
Current assignee: Chongqing Jianfeng Automobile Technology Co Ltd
Priority date: 2019-11-01
Filing date: 2019-11-01
Publication date: 2020-01-07

Abstract

The invention provides an electric drive axle, and relates to the technical field of automobiles. The electric drive axle comprises a motor, a speed reducer assembly and a differential mechanism assembly; the output end of the motor is in transmission connection with the input end of the speed reducer assembly, the output end of the speed reducer assembly is in transmission connection with the input end of the differential mechanism, and the output end of the differential mechanism can output power to the wheel hub; the speed reducer assembly and the differential assembly are arranged in the mounting shell; the differential assembly comprises a half shaft for power output, and a bearing is arranged on the half shaft; install the mounting bracket in the installation casing, the bearing inlays in the mounting bracket, and the semi-axis passes the mounting bracket to installation bearing complex operation among the alleviating prior art, consuming time longer, and technical problem such as the cost is higher.

Description

Electric drive axle

Technical Field

The invention relates to the technical field of automobiles, in particular to an electric drive axle.

Background

Transaxles are mechanisms located at the end of the drive train that are capable of changing the rotational speed and torque from the transmission and transmitting them to the drive wheels, and are also subject to vertical, longitudinal, and lateral forces acting between the road surface and the frame or body, as well as braking torque and reaction forces. The existing electric drive axle comprises a motor, a speed reducer assembly, a differential mechanism assembly, an axle housing assembly and a wheel hub assembly; the output end of the motor is in transmission connection with the input end of the speed reducer assembly, the output end of the speed reducer assembly is in transmission connection with the input end of the differential mechanism assembly, the output end of the differential mechanism assembly is in transmission connection with the wheel hub assembly, and the axle housing assembly is arranged between the differential mechanism assembly and the wheel hub assembly. In the commonly used electric drive bridge, the bearing frame and the bearing cap which are used for installing the bearing are connected by adopting fasteners such as bolts and gaskets, so when the electric drive bridge is installed or disassembled, a plurality of bolts and gaskets are required to be sequentially installed and disassembled, so that more structural parts are required, the operation is complex, and more time is also required to be consumed. And the bearing seat and the bearing cover are independent structures and need to be manufactured and molded respectively, so that the manufacturing cost is increased. In addition, if more fasteners are used, the weight of the resulting drive axle is increased, and it is not convenient to achieve a light weight design.

In view of the above, there is a need for an electric drive axle with a light weight design that is easy to install, and that can solve the above problems.

The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.

Disclosure of Invention

A first object of the present invention is to provide an electric drive axle that alleviates at least one of the above-mentioned technical problems.

In order to achieve the purpose, the invention adopts the following technical scheme:

the invention provides an electric drive axle, which comprises a motor, a speed reducer assembly and a differential mechanism assembly; the output end of the motor is in transmission connection with the input end of the speed reducer assembly, the output end of the speed reducer assembly is in transmission connection with the input end of the differential mechanism, and the output end of the differential mechanism can output power to the wheel hub;

the speed reducer assembly and the differential assembly are arranged in the mounting shell; the differential assembly comprises a half shaft for power output, and a bearing is arranged on the half shaft; the mounting structure is installed in the mounting shell, the bearing is embedded in the mounting structure, and the half shaft penetrates through the mounting structure.

In any of the above technical solutions, further, the mounting bracket includes a bearing seat for mounting the bearing, a bearing cover for plugging the bearing in the bearing seat, and an extension arm for fixedly connecting with the mounting housing, and the bearing seat, the bearing cover, and the extension arm are integrally formed;

the bearing cover has the through-hole that is used for passing the semi-axis, the extension arm certainly the bearing frame is kept away from the tip orientation of bearing cover extends near the direction of reduction gear assembly, just the diameter of extension arm is crescent along its extending direction, the extension of extension arm terminal with installation casing fixed connection.

In any one of the above technical solutions, further, an extending end portion of the extending arm is provided with a limiting table, and the limiting table is used for abutting against an inner side wall of the installation housing.

In any of the above technical solutions, further, a seal is disposed between the bearing cap and the axle shaft.

In any of the above technical solutions, further, the mounting frame and the mounting housing are both made of aluminum alloy.

In any of the above technical solutions, further, the differential assembly further includes a sun gear in transmission connection with the half shaft, a planetary gear in transmission connection with the sun gear, and a planet carrier for mounting the planetary gear;

the planet carrier sleeve is arranged on the half shaft and connected to the outer side of the sun gear, and the bearing is arranged on the outer side wall of the half shaft, which is sleeved with the planet carrier.

In any of the above technical solutions, further, the half shafts include a left half shaft and a right half shaft that are disposed opposite to each other, and the sun gear includes a first sun gear and a second sun gear that are disposed opposite to each other;

the mounting bracket is located left semi-axis department, left semi-axis with first sun gear transmission is connected, the second sun gear with right semi-axis transmission is connected, the both sides of planet wheel can respectively with first sun gear with second sun gear meshing transmission.

In any of the above technical solutions, further, the electric drive axle further includes an axle housing assembly;

the axle housing assembly comprises a left axle housing, the left axle housing is fixedly connected to the left side of the mounting shell, and the left half shaft is located in the left axle housing;

the axle housing assembly further comprises a right axle housing, the right axle housing is fixedly connected to the right side of the mounting shell, and the right half shaft is located in the right axle housing.

In any of the above solutions, further, the speed reducer assembly includes a secondary speed reducer assembly located in the mounting housing;

the output shaft of the motor is in transmission connection with the input end of the secondary speed reduction assembly through a spline, and the output end of the secondary speed reduction assembly is in transmission connection with the input end of the differential assembly through a spline.

In any of the above technical solutions, further, the output shaft of the motor, the input shaft of the speed reducer assembly, the output shaft of the speed reducer assembly, and the half shaft are all coaxially arranged.

In any of the above technical solutions, further, the output shaft of the motor adopts a hollow shaft.

The invention has the beneficial effects that:

the invention provides an electric drive axle, which comprises a motor, a speed reducer assembly and a differential mechanism assembly; the output end of the motor is in transmission connection with the input end of the speed reducer assembly, the output end of the speed reducer assembly is in transmission connection with the input end of the differential mechanism, and the output end of the differential mechanism can output power to the wheel hub. The differential mechanism assembly comprises a half shaft for power output, and a bearing is arranged on the half shaft; the mounting frame is installed in the installation shell, the bearing is embedded in the mounting frame, and the semi-axis passes through the mounting frame to be connected with the mounting frame transmission.

The mounting frame can replace a bearing seat and a bearing cover for mounting a bearing, so that fasteners such as bolts and gaskets used in the mounting of the bearing seat and the bearing cover are omitted, a plurality of bolts and gaskets are not required to be sequentially mounted and dismounted, and the time consumed in mounting and dismounting is saved. Secondly, the mounting frame is taken as a whole, and a plurality of parts are not needed to be combined, so that the mounting frame is more convenient to mount and use and is simple and convenient to mount and operate. Meanwhile, the mounting frame can be formed at one time during manufacturing as a whole, and the parts do not need to be formed respectively, so that the manufacturing cost is reduced, and the time is saved. In addition, this mounting bracket only need be used for when using with the installation casing fixed can, so save fasteners such as part bolt, reduce the weight that forms the electric bridge, the lightweight design of the electric bridge of being more convenient for.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic view of an electric drive axle provided by an embodiment of the present invention;

FIG. 2 is a first partial schematic view of a mounting bracket coupled to a half shaft and a mounting housing in accordance with an embodiment of the present invention;

FIG. 3 is a second partial schematic view of the attachment of the mounting bracket to the axle shaft and mounting housing provided in accordance with the present invention;

fig. 4 is a schematic view of a mounting frame according to an embodiment of the present invention.

Icon: 10-mounting a housing; 21-half shaft; 22-sun gear; 23-a planet wheel; 24-a planet carrier; 30-a mounting frame; 31-a bearing cap; 32-a bearing seat; 33-an extension arm; 34-a seal; 40-a bearing; 51-left axle housing; 52-right axle housing; 60-a hub assembly; 70-a brake assembly; 311-a via hole; 331-a mounting table; 332-a limit table; 333-limiting shoulder.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "first" and "second" 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 explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Examples

As shown in fig. 1-4, the present embodiment provides an electric drive axle including an electric motor, a reducer assembly and a differential assembly; the output end of the motor is in transmission connection with the input end of the speed reducer assembly, the output end of the speed reducer assembly is in transmission connection with the input end of the differential mechanism, and the output end of the differential mechanism can output power to the wheel hub; the speed reducer is characterized by further comprising a mounting shell 10, wherein the speed reducer assembly and the differential assembly are arranged in the mounting shell 10; the differential assembly comprises a half shaft 21 for power output, and a bearing 40 is arranged on the half shaft 21; the mounting frame 30 is installed in the mounting case 10, the bearing 40 is embedded in the mounting frame 30, and the half shaft 21 passes through the mounting frame 30.

Specifically, taking the example that the motor, the speed reducer assembly and the differential assembly are all installed in the installation housing 10, the power output by the motor is transmitted to the differential assembly after passing through the speed reducer assembly, and is transmitted to the wheel hub assembly 60 by the differential assembly, so as to realize the rotation control of the wheel hub. The differential assembly comprises a half shaft 21 for power output, a mounting frame 30 is mounted in the mounting shell 10, and one end, far away from the speed reducer assembly, of the half shaft 21 penetrates through the mounting frame 30 to be in transmission connection with a hub; the bearing 40 which is positioned on the half shaft 21 and used for supporting the half shaft 21 is embedded in the mounting frame 30, so that the transmission connection between the half shaft 21 and the mounting frame 30 is realized, the friction coefficient between the half shaft 21 and the mounting frame 30 is reduced, and the half shaft 21 is ensured to have good rotation precision.

The mounting frame 30 can replace a bearing seat 32 and a bearing cover 31 for mounting the bearing 40, so that fasteners such as bolts and gaskets used when the bearing seat 32 and the bearing cover 31 are mounted in a matched mode are omitted, a plurality of bolts and gaskets do not need to be mounted and dismounted in sequence, and time consumed by mounting and dismounting is saved. Secondly, the mounting bracket 30 as a whole does not need to be formed by combining a plurality of parts, so that the mounting bracket is more convenient to mount and use and is simple and convenient to mount and operate. Meanwhile, the mounting frame 30 only needs to be formed once during manufacturing, and is not required to be formed for each part, so that manufacturing cost is reduced, and time is saved. In addition, the mounting frame 30 only needs to be used for fixing with the mounting shell 10 when in use, so that part of fasteners such as bolts are omitted, the weight of the electric drive bridge is reduced, and the light-weight design of the electric drive bridge is facilitated.

It should be added that the arrangement is not limited to the arrangement of "the motor is also installed in the installation housing 10", but the arrangement of "the motor is installed outside the installation housing 10" is also possible. When the arrangement mode of 'the motor is arranged on the outer side of the mounting shell 10' is adopted, the motor is provided with a motor shell which is independent, and the output end of the motor is in transmission connection with the input end of the speed reducer assembly.

With continued reference to fig. 2-4, preferably, the mounting bracket 30 includes a bearing seat 32 for mounting the bearing 40, a bearing cover 31 for sealing the bearing 40 in the bearing seat 32, and an extension arm 33 for fixedly connecting with the mounting housing 10, and the bearing seat 32, the bearing cover 31, and the extension arm 33 are integrally formed; the bearing cover 31 has a through hole 311 for passing through the axle shaft 21, the extension arm 33 extends from the end of the bearing seat 32 away from the bearing cover 31 toward the direction approaching the speed reducer assembly, and the diameter of the extension arm 33 gradually increases along the direction of extension thereof, and the extended end of the extension arm 33 is fixedly connected with the mounting case 10.

Specifically, the mounting bracket 30 is of a bowl-shaped structure, and the mounting bracket 30 as a whole can be divided into connecting portions having three different functions, that is: the bearing seat 32 for mounting the bearing 40, the bearing cover 31 for sealing the bearing 40 in the bearing seat 32 and the extension arm 33 for fixedly connecting with the mounting shell 10 are integrally formed, so that good integrity is ensured.

The bearing seat 32 has an embedding groove for embedding the bearing 40, the bearing 40 can be installed in the embedding groove, the inner ring of the bearing 40 is connected to the half shaft 21, the outer ring of the bearing 40 is connected to the groove wall of the embedding groove, so that the inner supporting point of the bearing 40 is the half shaft 21, and the outer supporting point of the bearing 40 is the bearing seat 32. The bearing cover 31 is sealed at one end of the bearing seat 32 far away from the reducer assembly, the end face of the bearing cover 31 facing the bearing seat 32 abuts on the outer ring of the bearing 40, and the bearing cover 31 is provided with a through hole 311 penetrating through the bearing cover 31, so that the half shaft 21 penetrates through the through hole to be in transmission connection with the hub assembly 60. The extension arm 33 extends from the end of the bearing seat 32 far away from the bearing cover 31 to the direction close to the speed reducer assembly, the diameter of the extension arm 33 is gradually increased in the extension process, a conical surface with the gradually increased diameter is further formed, and the extension end of the extension arm 33 is connected with the mounting shell 10 through bolt fastening. Namely: the bearing cap 31 and the bearing seat 32 serve as a bowl bottom of the bowl structure, and the extension arm 33 serves as a bowl wall of the bowl structure, so that the mounting frame 30 in the bowl structure is mounted on the mounting housing 10 and the half shaft 21.

With continued reference to fig. 2-4, in actual use, the extending end of the extending arm 33 is provided with a limit stand 332, and the limit stand 332 is used to abut against the inner side wall of the installation housing 10.

Specifically, the extended end of the extension arm 33 is provided with a mounting table 331 extending in the radial direction of the half shaft 21 and toward the axial direction away from the half shaft 21, and the mounting table 331 has a bolt hole for a bolt to pass through so as to be fixedly connected to the mounting case 10. Meanwhile, one side of the mounting table 331 facing the reducer assembly is provided with a limiting table 332, and the top of the limiting table 332 abuts against the inner side wall of the mounting shell 10, so that axial limiting of the joint of the mounting frame 30 and the mounting shell 10 is achieved, stable mounting between the mounting frame 30 and the mounting shell 10 is ensured, and the mounting frame cannot shake easily. One side of the mounting table 331, which is far away from the reducer assembly, is provided with a limiting shoulder 333, and the top of the limiting shoulder 333 is abutted against the inner wall of the shell on the same side for axial limiting of the joint of the two.

With continued reference to fig. 2 and 3, in actual use, a seal 34 is provided between the bearing cap 31 and the axle shaft 21.

Specifically, the axle shaft 21 passes through the through hole 311 on the bearing cover 31 to be in transmission connection with the hub assembly 60, and the axle shaft 21 is in transmission connection with the mounting bracket 30, so that the sealing member 34 is located between the hole wall of the through hole 311 and the outer side wall of the axle shaft 21, thereby reducing the abrasion between the axle shaft 21 and the bearing cover 31, and simultaneously ensuring the tightness of the cavity formed by the mounting bracket 30 for mounting the gears in the differential assembly, so as to facilitate the circulation of lubricating oil in the cavity, thereby reducing the probability of oil leakage between the axle shaft 21 and the bearing cover 31.

Wherein the sealing member 34 is a sealing ring.

Preferably, the mounting bracket 30 and the mounting housing 10 are made of aluminum alloy. The aluminum alloy has a significantly reduced weight compared to the cast iron material, so that by using the mounting bracket 30 and the mounting case 10 made of the aluminum alloy, the weight of forming the electric drive bridge is reduced, and a lightweight design of the electric drive bridge is further realized. Meanwhile, the aluminum alloy material has good thermal conductivity, so that heat dissipation of gear oil added in the speed reducer assembly and the differential assembly is facilitated, the temperature of the gear in the mounting shell 10 is kept in a low state, and the lubrication of the gear, the bearing 40 and other parts is facilitated.

With continued reference to fig. 2 and 3, in actual use, the differential assembly further includes a sun gear 22 drivingly connected to the axle shaft 21, planet gears 23 drivingly connected to the sun gear 22, and a planet carrier 24 for mounting the planet gears 23; the planet carrier 24 is sleeved on the half shaft 21 and connected to the outer side of the sun gear 22, and the bearing 40 is installed on the outer side wall of the half shaft 21 sleeved on the planet carrier 24.

Specifically, the sun gear 22 is in transmission connection with the half shaft 21, the sun gear 22 is in transmission connection with the planet gear 23, the planet gear 23 is installed through the planet carrier 24, and the planet carrier 24 is installed on the sun gear 22 and sleeved on the half shaft 21. The inner ring of the bearing 40 is arranged on the planet carrier 24, and one end of the planet carrier 24 facing the bearing 40 is provided with a shoulder, the end part of the shoulder is abutted against the inner ring of the bearing 40, so that the bearing 40 is positioned and installed by matching with the bearing cover 31 and the bearing seat 32, and the risk that the inner ring and the outer ring are separated during the transmission process of the bearing 40 is reduced.

In some embodiments, half shaft 21 comprises oppositely disposed left and right half shafts, and sun gear 22 comprises oppositely disposed first and second sun gears; the mounting bracket 30 is located left semi-axis department, and left semi-axis is connected with first sun gear transmission, and the second sun gear is connected with right semi-axis transmission, and the both sides of planet wheel 23 can be respectively with first sun gear and second sun gear meshing transmission.

Specifically, the left half shaft is in transmission connection with the first sun gear, the right half shaft is in transmission connection with the second sun gear through the intermediate shaft, two sides of the planet wheel 23 are in transmission connection with the first sun gear and the second sun gear respectively, the left half shaft is in transmission connection with the hub assembly 60 located on the left side, and the right half shaft is in transmission connection with the hub assembly 60 located on the right side, so that power distribution transmitted to the differential assembly by the speed reducer assembly is achieved, and control over the two hub assemblies 60 located on two sides of the differential assembly is achieved.

Wherein the mounting bracket 30 is disposed on the axle shaft 21 on the side of the differential assembly remote from the power source.

With continued reference to FIG. 1, in some embodiments, the electric drive axle further includes an axle housing assembly; the axle housing assembly comprises a left axle housing 51, the left axle housing 51 is fixedly connected to the left side of the mounting shell 10, and a left half shaft is positioned in the left axle housing 51; the axle housing assembly further includes a right axle housing 52, the right axle housing 52 being fixedly attached to the right side of the mounting housing 10, the right axle shaft being located within the right axle housing 52. And left axle housing 51 and right axle housing 52 also adopt the aluminum alloy to make, reduce the weight of axle housing assembly, realize the lightweight design of electric drive axle.

In some embodiments, the speed reducer assembly includes a secondary speed reducer assembly located within the mounting housing 10; the output shaft of the motor is in transmission connection with the input end of the secondary speed reducing assembly through a spline, and the output end of the secondary speed reducing assembly is in transmission connection with the input end of the differential assembly through a spline.

Preferably, the output shaft of the motor, the input shaft of the reducer assembly, the output shaft of the reducer assembly and the half shaft 21 are coaxially arranged.

Specifically, the speed reducer assembly adopts a two-stage speed reducer assembly and is positioned in the mounting shell 10, and the output shaft of the motor, the input port of the speed reducer assembly, the output shaft of the speed reducer assembly and the half shaft 21 in transmission connection with the hub assembly 60 are all coaxially arranged, so that the space volume occupied by the speed reducer assembly is effectively reduced, and the weight of the electric drive axle is also reduced.

Preferably, the output shaft of motor adopts the hollow shaft, is difficult to the unstability, and the weight of output shaft also can reduce, further realizes the lightweight design of electricity driving bridge.

Wherein a brake assembly 70 is provided on a side of the hub assembly 60 facing the axle housing assembly to facilitate a braking operation of each hub assembly 60.

It should be added that the specific structures and installation manners of the secondary deceleration assembly, the hub assembly 60 and the brake assembly 70 are all mature technologies, and do not belong to the protection point of the present application, so that the details are not described herein.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An electric drive axle comprises a motor, a speed reducer assembly and a differential mechanism assembly; the output end of the motor is in transmission connection with the input end of the speed reducer assembly, the output end of the speed reducer assembly is in transmission connection with the input end of the differential mechanism, and the output end of the differential mechanism can output power to the wheel hub;

the speed reducer assembly and the differential assembly are both arranged in the mounting shell (10); the differential assembly comprises a half shaft (21) for power output, and a bearing (40) is arranged on the half shaft (21); a mounting frame (30) is mounted in the mounting shell (10), the bearing (40) is embedded in the mounting frame (30), and the half shaft (21) penetrates through the mounting frame (30).

2. The electric drive axle according to claim 1, wherein the mounting bracket (30) comprises a bearing seat (32) for mounting the bearing (40), a bearing cover (31) for sealing the bearing (40) in the bearing seat (32), and an extension arm (33) for fixedly connecting with the mounting housing (10), and the bearing seat (32), the bearing cover (31), and the extension arm (33) are integrally formed;

the bearing cover (31) is provided with a through hole (311) for penetrating through the half shaft (21), the extension arm (33) extends from the end part of the bearing seat (32) far away from the bearing cover (31) to the direction close to the speed reducer assembly, the diameter of the extension arm (33) is gradually increased along the extension direction, and the extension end of the extension arm (33) is fixedly connected with the mounting shell (10).

3. Electric drive axle according to claim 2, characterized in that the extension end of the extension arm (33) is provided with a stop (332), which stop (332) is intended to abut against an inner side wall of the mounting housing (10).

4. Electric drive axle according to claim 2, characterized in that a seal (34) is arranged between the bearing cap (31) and the half shaft (21).

5. Electric drive axle according to any of claims 1-4, characterized in that the mounting frame (30) and the mounting housing (10) are both made of an aluminium alloy.

6. The electric drive axle according to claim 5, wherein the differential assembly further comprises a sun wheel (22) in driving connection with the half shaft (21), planet wheels (23) in driving connection with the sun wheel (22), and a planet carrier (24) for mounting the planet wheels (23);

the planet carrier (24) is sleeved on the half shaft (21) and connected to the outer side of the sun gear (22), and the bearing (40) is installed on the outer side wall of the half shaft (21) sleeved with the planet carrier (24).

7. The electric drive axle according to claim 6, wherein the half-shafts (21) comprise oppositely disposed left and right half-shafts, and the sun gear (22) comprises oppositely disposed first and second sun gears;

the mounting bracket (30) is located left semi-axis department, left semi-axis with first sun gear transmission is connected, the second sun gear with right semi-axis transmission is connected, the both sides of planet wheel (23) can respectively with first sun gear with second sun gear meshing transmission.

8. The electric drive axle of claim 7, further comprising an axle housing assembly;

the axle housing assembly comprises a left axle housing (51), the left axle housing (51) is fixedly connected to the left side of the mounting shell (10), and a left half shaft is located in the left axle housing (51);

the axle housing assembly further comprises a right axle housing (52), wherein the right axle housing (52) is fixedly connected with the right side of the mounting shell (10), and the right half shaft is positioned in the right axle housing (52).

9. The electric drive axle according to claim 5, characterized in that said speed reducer assembly further comprises a secondary speed reduction assembly located inside said mounting housing (10);

10. The electric drive axle of claim 5, wherein the output shaft of the motor is a hollow shaft.