CN215883205U

CN215883205U - Highly integrated electric drive axle system

Info

Publication number: CN215883205U
Application number: CN202121550435.5U
Authority: CN
Inventors: 汪鑫
Original assignee: Sina-Newchance New Energy Technology Corp ltd
Current assignee: Sina-Newchance New Energy Technology Corp ltd
Priority date: 2021-07-08
Filing date: 2021-07-08
Publication date: 2022-02-22
Anticipated expiration: 2031-07-08

Abstract

The utility model relates to the technical field of electric drive axles and discloses a highly-integrated electric drive axle system which comprises an integrated shell, wherein a motor shaft and a rotor sub-assembly are arranged inside the integrated shell, a stator sub-assembly is arranged on one side of the motor shaft and the rotor sub-assembly, a water channel is arranged on one side of the stator sub-assembly, one side of the stator sub-assembly and one side of the water channel are fixedly connected with the same motor end cover, a differential mechanism shaft sub-assembly is arranged on the inner wall of the integrated shell, and a axle housing sub-assembly is arranged on one side of the differential mechanism shaft sub-assembly. The driving motor, the speed reducer and the differential are integrated into a whole to form a highly integrated electric drive axle assembly, the comprehensive weight reduction effect is good, errors caused by split machining and assembly errors of the motor and the speed reducer are avoided, the transmission error of the gear is reduced, the NVH of the driving system is optimized, the cost is reduced, and the enterprise benefit is improved.

Description

Highly integrated electric drive axle system

Technical Field

The utility model relates to the technical field of electric drive axles, in particular to a highly integrated electric drive axle system.

Background

The new energy automobile has the advantages of low energy consumption, light pollution and the like which are incomparable with the traditional fuel oil automobile, can improve the problems of energy shortage, environmental pollution and the like, can save fuel oil energy, can reduce exhaust emission, and effectively protects the environment, and the common new energy automobile adopts new technology and new structure, 5261, so that the new energy automobile has higher efficiency and low noise.

The arrangement form of a rear wheel drive new energy automobile driving system in the current market is mainly divided into the following two schemes: the driving motor is connected with the transmission and then connected with a rear axle differential through a transmission shaft; scheme II: the speed reducer and the differential are integrated together on a rear axle and then connected with the driving motor, the scheme is that the driving form adopted by the traditional new energy electric automobile is connected with the speed changer by the driving motor firstly and then connected with the rear axle differential through the transmission shaft, the rear driving mode ensures that the whole transmission path is longer, the transmission efficiency is low, the parts are more, the problems of heavier service quality, difficult space arrangement, poor stability and the like are caused, the scheme is a novel new energy electric automobile driving form which is also started to appear on the market in recent years, compared with the scheme I, the scheme II cancels the transmission shaft, and simultaneously integrates the speed reducer and the differential on the rear axle, so that the driving motor can be directly connected with the rear axle, thereby reducing a plurality of parts and shortening the transmission distance, but the two schemes are not compact enough in structure, the production cost is high, and the whole body is relatively heavy, so that it is very necessary to provide a highly integrated electric drive axle system.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

Aiming at the defects of the prior art, the utility model provides a highly integrated electric drive axle system, which mainly solves the problems that the electric drive axle systems in the current market are not compact enough in structure, high in production cost and heavy in whole.

(II) technical scheme

In order to achieve the purpose, the utility model provides the following technical scheme:

the utility model provides a high integrated integration electric drive axle system, includes the integration casing, the inside of integration casing is equipped with motor shaft and rotor subassembly, and one side of motor shaft and rotor subassembly is equipped with stator subassembly, and one side of stator subassembly is equipped with the water course, the same motor end cover of one side fixedly connected with of stator subassembly and water course, be equipped with differential mechanism axle subassembly on the inner wall of integration casing, and one side of differential mechanism axle subassembly is equipped with axle housing subassembly, one side of integration casing is equipped with input shaft subassembly, and one side of input shaft subassembly is equipped with the intermediate shaft subassembly.

As a still further aspect of the present invention, the motor shaft and rotor subassembly includes a driving motor, and a rotor of the driving motor is connected to the input shaft subassembly.

Furthermore, the intermediate shaft subassembly comprises an intermediate shaft, the intermediate shaft is connected with the input shaft subassembly, and the input shaft subassembly comprises a speed reducer.

On the basis of the scheme, the differential shaft sub-assembly comprises a differential, and the differential is connected with the intermediate shaft.

As a further scheme of the utility model, a left half shaft and a right half shaft are rotatably connected inside the axle housing sub-assembly and are connected with the differential mechanism.

Furthermore, a reduction gearbox end cover is fixed on one side of the integrated shell through bolts and is designed to be concave.

On the basis of the scheme, the inner wall of the integrated shell is provided with an oil baffle plate.

(III) advantageous effects

Compared with the prior art, the utility model provides a highly integrated electric drive axle system, which has the following beneficial effects:

1. the utility model omits a bolt for connecting the motor and the reduction gearbox, omits a motor end cover for the motor-reduction gearbox integrated shell, shortens the axial size of the motor-reduction gearbox, reduces some parts, has good comprehensive weight reduction effect, avoids errors caused by split processing and assembly errors of the motor and the reduction gearbox, reduces the transmission error of gears, optimizes the NVH of a driving system, reduces the cost, improves the enterprise benefit, reduces a motor end cover for the integrated shell, reduces the number of a set of dies, and can effectively reduce the material cost and the die cost of the assembly.

2. The utility model integrates a driving motor, a speed reducer and a differential mechanism into a whole to form a highly integrated electric drive axle assembly, the motor and the speed reducer share the same shell, the differential mechanism is integrated in the speed reducer, finally, the whole system is connected with an axle shell, the driving motor drives a rotor to rotate and then drives the speed reducer to rotate, and finally, the power is transmitted to a left half shaft and a right half shaft under the assistance of the differential mechanism to drive a vehicle to go forward or turn and the like.

3. The concave design mode is adopted for the end cover of the reduction gearbox, so that the distance between bearings supported by each shaft is effectively shortened, the rigidity of each shaft is improved, the deflection is reduced, the dislocation quantity of the shafts is reduced, the contribution to the good NVH performance of the bridge assembly is huge, and less lubricating oil can be used to achieve a better lubricating effect.

4. The oil baffle plate is integrated on the integrated shell, so that the oil baffle plate can be directly and integrally formed, the procedure of installing the oil baffle plate is omitted, the strength and the rigidity of the oil baffle plate are improved, and the thickness of the oil baffle plate can be reduced on the basis of the original structure.

Drawings

Fig. 1 is a schematic perspective view of a highly integrated electric drive axle system according to the present invention;

FIG. 2 is a schematic diagram of an integrated housing structure of a highly integrated electric drive axle system according to the present invention;

fig. 3 is a schematic structural diagram of a reduction gearbox end cover of a highly integrated electric drive axle system provided by the utility model.

In the figure: 1. an integrated housing; 2. a motor shaft and a rotor sub-assembly; 3. a stator sub-assembly; 4. a motor end cover; 5. a water channel; 6. a differential axle subassembly; 7. an axle housing sub-assembly; 8. a middle shaft sub-assembly; 9. an input shaft subassembly; 10. reduction box end cover.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.

Referring to fig. 1-3, a highly integrated electric drive axle system comprises an integrated housing 1, a motor shaft and rotor subassembly 2 is arranged inside the integrated housing 1, a stator subassembly 3 is arranged on one side of the motor shaft and rotor subassembly 2, a water channel 5 is arranged on one side of the stator subassembly 3, a same motor end cover 4 is fixed on one side of the stator subassembly 3 and the water channel 5 through bolts, a differential mechanism shaft subassembly 6 is arranged on the inner wall of the integrated housing 1, a axle housing subassembly 7 is arranged on one side of the differential mechanism shaft subassembly 6, an input shaft subassembly 9 is arranged on one side of the integrated housing 1, a middle shaft subassembly 8 is arranged on one side of the input shaft subassembly 9, bolts for connecting a motor and a reduction gearbox are omitted, one motor end cover 4 is omitted from the housing of the motor-reduction gearbox integrated housing, and the axial size of the motor-reduction gearbox is shortened, the integrated shell has the advantages that a plurality of parts are reduced, the comprehensive weight reduction effect is good, errors caused by split machining and assembly errors of the motor and the reduction gearbox are avoided, the transmission error of the gear is reduced, the NVH of a driving system is optimized, the cost is reduced, the enterprise benefit is improved, one motor end cover 4 is reduced for the integrated shell 1, the number of a set of dies is reduced, and the material cost and the die cost of the assembly can be effectively reduced.

In particular, the motor shaft and rotor subassembly 2 comprises a driving motor, a rotor of the driving motor is connected with an input shaft subassembly 9, an intermediate shaft subassembly 8 comprises an intermediate shaft, the intermediate shaft is connected with the input shaft subassembly 9, the input shaft subassembly 9 comprises a speed reducer, a differential mechanism shaft subassembly 6 comprises a differential mechanism, the differential mechanism is connected with the intermediate shaft, a left half shaft and a right half shaft are rotatably connected inside the axle housing subassembly 7, the left half shaft and the right half shaft are connected with the differential mechanism, the driving motor, the speed reducer and the differential mechanism are integrated into a whole to form a highly integrated electric drive axle assembly, the motor and the reduction gearbox share the same shell, the differential mechanism is integrated in the reduction gearbox, finally the whole system is connected with the axle housing, the driving motor drives the rotor to rotate and then drives the speed reducer to rotate, and finally, the power is transmitted to the left half shaft and the right half shaft under the assistance of the differential mechanism, driving the vehicle forward or to turn, etc.

It should be noted that, a reduction gearbox end cover 10 is fixed on one side of the integrated shell 1 through bolts, the reduction gearbox end cover 10 is designed to be concave, the reduction gearbox end cover 10 adopts a concave design mode, the distance between shaft support bearings is effectively shortened, the rigidity of each shaft is improved, the deflection is reduced, the dislocation amount of the shafts is reduced, the contribution to the good NVH performance of a bridge assembly is huge, meanwhile, less lubricating oil can be used for achieving a better lubricating effect, an oil baffle plate is arranged on the inner wall of the integrated shell 1, the oil baffle plate is integrated on the integrated shell 1, the oil baffle plate can be directly formed integrally, the process of installing the oil baffle plate is omitted, meanwhile, the strength and the rigidity of the oil baffle plate are improved, and the thickness can be reduced on the original basis.

The working principle of the embodiment is as follows: a motor end cover 4 is omitted from the motor-reduction gearbox integrated shell, the axial size of the motor-reduction gearbox is shortened, errors caused by split machining and assembly errors of the motor and the reduction gearbox are avoided, the transmission error of gears is reduced, NVH of a driving system is optimized, a driving motor, a speed reducer and a differential are integrated into a whole to form a highly integrated electric drive axle assembly, the motor and the reduction gearbox share the same shell, meanwhile, the differential mechanism is integrated in the reduction gearbox, finally, the whole system is connected with the axle housing, the power flow is transmitted to the input shaft subassembly 9 by the motor shaft and rotor subassembly 2, then transmitted to a differential shaft sub-assembly 6 through a middle shaft sub-assembly 8, and finally transmitted to a left half shaft and a right half shaft through the differential shaft sub-assembly 6 to drive the vehicle to advance or turn, and the like.

The electrical components presented in the document are all electrically connected with an external master controller and 220V mains, and the master controller can be a conventional known device controlled by a computer or the like.

In the description herein, it is to be noted that, unless expressly stated or limited otherwise, the terms "connected" and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; the connection may be mechanical or electrical, and may be direct or indirect via an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the description herein, it is noted that relational terms such as first and second, and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a high integrated integration electric drive axle system, includes integration casing (1), its characterized in that, the inside of integration casing (1) is equipped with motor shaft and rotor subassembly (2), and one side of motor shaft and rotor subassembly (2) is equipped with stator subassembly (3), and one side of stator subassembly (3) is equipped with water course (5), the same motor end cover (4) of one side fixedly connected with of stator subassembly (3) and water course (5), be equipped with differential mechanism axle subassembly (6) on the inner wall of integration casing (1), and one side of differential mechanism axle subassembly (6) is equipped with axle housing subassembly (7), one side of integration casing (1) is equipped with input shaft subassembly (9), and one side of input shaft subassembly (9) is equipped with intermediate shaft subassembly (8).

2. A highly integrated, integrated electric drive axle system according to claim 1, characterized in that the motor shaft and rotor subassembly (2) comprises a drive motor, the rotor of which is connected to the input shaft subassembly (9).

3. A highly integrated, integrated electric drive axle system according to claim 2, characterized in that the intermediate shaft sub-assembly (8) comprises an intermediate shaft, which intermediate shaft is connected with an input shaft sub-assembly (9), which input shaft sub-assembly (9) comprises a speed reducer.

4. A highly integrated, integrated electric drive axle system according to claim 3, characterized in that said differential axle subassembly (6) comprises a differential, which is connected with an intermediate axle.

5. A highly integrated, integrated electric drive axle system according to claim 4, characterized in that the axle housing sub-assembly (7) has rotatably connected to it left and right axle shafts connected to a differential.

6. A highly integrated electric drive axle system according to claim 5, wherein a reduction gearbox end cover (10) is fixed on one side of the integrated housing (1) through bolts, and the reduction gearbox end cover (10) is of a concave design.

7. A highly integrated, integrated electric drive axle system according to claim 1, characterized in that the integrated housing (1) is provided with oil baffle on its inner wall.