CN116278690A

CN116278690A - Integrated electric drive axle assembly and automobile comprising same

Info

Publication number: CN116278690A
Application number: CN202310219136.0A
Authority: CN
Inventors: 汪鹏鹏; 严鉴铂; 刘义; 康婷; 谭少锋; 高建敏; 王晓亮
Original assignee: Shaanxi Fast Auto Drive Group Co Ltd
Current assignee: Shaanxi Fast Auto Drive Group Co Ltd
Priority date: 2023-03-08
Filing date: 2023-03-08
Publication date: 2023-06-23

Abstract

The invention discloses an integrated electric drive axle assembly and an automobile comprising the same, which belong to the field of new energy automobiles, and the integrated electric drive axle assembly integrates a motor, a gearbox, a drive axle and a power takeoff together, can output power through the power takeoff as required to provide power for devices such as an oil pump, a water pump and the like of an accessory on the vehicle for operation in the running process of the automobile, and has high integration level. The invention couples the two power sources to realize at least seven working modes, meets the use requirements of various working conditions and has wide application range. The gear wheel is coaxially arranged with the axle shaft of the drive axle, so that the weight of the gear wheel suspended outside the axle housing is reduced, and the strength of the reducer housing is obviously improved. The shortest mechanical transmission path is provided, the transmission efficiency is high, and the device is suitable for low-load power driving in a full-speed range. The power platform meets two use requirements of vehicle running and operation, reduces system power and torque redundancy, improves overall system efficiency, and saves cost.

Description

Integrated electric drive axle assembly and automobile comprising same

Technical Field

The invention belongs to the field of new energy automobiles, and particularly relates to an integrated electric drive axle assembly and an automobile comprising the same.

Background

In order to improve the power and the volume density of the new energy automobile, the technology of an electric drive system is developed towards an integrated design; meanwhile, in order to improve the universality of the product and reduce the development cost, more user requirements are required to be met through an integrated structure. With the continuous application of new energy automobile technology to commercial vehicles, an electric drive axle system with high transmission efficiency and high structural integration becomes the main stream of whole vehicle matching. Currently, two integrated schemes of a single motor, a speed reducer, a driving axle and a double motor, a speed reducer and a driving axle are adopted in the market. In order to meet the requirements of use under various working conditions, the motor power adopted by a single motor scheme is quite high, but in the actual running process of the vehicle, the required power is quite low under most conditions, and the motor operates in a low-efficiency area, so that the energy consumption of the whole vehicle is high; in the double-motor scheme, the motor and the speed reducer are arranged at one side or two sides of the drive axle in an offset state, and the strength requirement on the connecting shell of the speed reducer is very high. And these electric drive axle products are only used for driving the whole vehicle, and a motor is needed to be equipped for providing power for actions (such as a hydraulic oil pump and the like) except driving, so that the weight of the whole vehicle is increased, and the electric control cost is increased.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide an integrated electric drive axle assembly and an automobile comprising the same, so as to solve the problems of high motor power, high whole automobile energy consumption, high strength requirement of a double-motor scheme reducer shell, heavy whole automobile quality and high electric control cost in the single-motor scheme in the prior art.

In order to achieve the above purpose, the invention is realized by adopting the following technical scheme:

an integrated electric drive axle assembly, comprising: the first driving motor is connected with a first input shaft driving gear through a first input shaft, the first input shaft driving gear is meshed with a large gear ring, the large gear ring is connected with a third sliding sleeve, a second hollow shaft gear is sleeved above the large gear ring and is meshed with a first driven gear, the first driven gear is arranged at one end of a middle shaft, the other end of the first driven gear is connected with a third driven gear, the third driven gear is meshed with a differential gear, the differential gear is fixedly connected with the differential gear, and the differential gear is connected with wheels through half shafts at two sides;

the second driving motor is connected with a second input shaft driving gear through a second input shaft, the second input shaft is coaxially arranged with the power taking output shaft, and the end part of the power taking output shaft is connected with a flange plate; the second input shaft driving gear is meshed with one side of the idler wheel, the other side of the idler wheel is meshed with the sun wheel, the sun wheel is meshed with the planet wheel, the planet wheel is meshed with the large gear ring, the planet wheel is arranged at one end of the planet carrier, the other end of the planet carrier is connected with the first sliding sleeve, and the first sliding sleeve can be combined and separated with the shell gear in a sliding mode.

Preferably, one end of the second driven gear is connected with the intermediate shaft, the end head of the intermediate shaft is connected with the first driven gear after the intermediate shaft is prolonged, the first driven gear is meshed with the first hollow shaft gear, and a second sliding sleeve is arranged between the second hollow shaft gear and the first hollow shaft gear to realize three-gear transmission.

Preferably, one end of the second input shaft is connected with the flange plate, the power taking driving wheel is connected first, the power taking driving wheel is meshed with the straight teeth of the power taking driven wheel, and the power taking driven wheel is connected with the flange plate through the output shaft, so that speed reduction, torque increase and reversing are realized.

Preferably, the power taking driving wheel is meshed with the power taking driven wheel through bevel gears, and the output shaft is perpendicular to the second input shaft.

Preferably, when the single motor runs at first gear, the first driving motor works, the second driving motor does not work, the first sliding sleeve is separated from the shell gear, and the third sliding sleeve is in gear at left.

Preferably, when the single motor is driven in the second gear, the first driving motor works, the second driving motor does not work, the first sliding sleeve is separated from the shell gear, and the third sliding sleeve is in gear right.

Preferably, when the double-motor first-gear running is performed, the first driving motor works, the second driving motor works, the first sliding sleeve is not separated from the shell gear, and the third sliding sleeve is in gear left.

Preferably, when the double-motor two-gear running is performed, the first driving motor works, the second driving motor works, the first sliding sleeve is not separated from the shell gear, and the third sliding sleeve is in gear right.

Preferably, when the vehicle runs at first gear and works, the first driving motor works, the second driving motor works, the first sliding sleeve is separated from the shell gear, and the third sliding sleeve is in gear at left.

The invention also discloses an automobile, which comprises the integrated electric drive axle assembly.

Compared with the prior art, the invention has the following beneficial effects:

the invention discloses an integrated electric drive axle assembly, which integrates a motor, a gearbox, a drive axle and a power takeoff together, can output power through the power takeoff as required in the running process of an automobile to supply power for devices such as an oil pump, a water pump and the like of an accessory device of the automobile for operation, and has high integration level. The invention couples the two power sources to realize at least seven working modes, meets the use requirements of various working conditions and has wide application range. The gear wheel is coaxially arranged with the axle shaft of the drive axle, so that the weight of the gear wheel suspended outside the axle housing is reduced, and the strength of the reducer housing is obviously improved. The shortest mechanical transmission path is provided, the transmission efficiency is high, and the device is suitable for low-load power driving in a full-speed range. The power platform meets two use requirements of vehicle running and operation, reduces system power and torque redundancy, improves overall system efficiency, and saves cost.

Further, by adding a pair of gear pair first hollow shaft gears, first driven gears and second sliding sleeves, a three-gear transmission mode can be realized, and 10 working modes can be realized in total by controlling the first driving motor, the second driving motor, the first sliding sleeve and the shell gears to be separated or combined and controlling the left and right sliding positions of the second sliding sleeve and the third sliding sleeve, and meanwhile, the mechanical transmission route provided by the highest gear is shortest and the transmission efficiency is highest.

Furthermore, the primary gear pair is used for taking power to drive wheels and taking power to drive wheels to achieve speed reduction, torque increase and reversing.

Drawings

Fig. 1 is a schematic diagram of an electric drive bridge structure according to embodiment 1 of the present invention;

fig. 2 is a schematic diagram of an electric drive bridge according to embodiment 2 of the present invention;

FIG. 3 is a schematic diagram of an electrically driven bridge according to embodiment 3 of the present invention;

fig. 4 is a schematic diagram of an electrically driven bridge structure according to embodiment 4 of the present invention.

Wherein: 1-a first drive motor; 2-a first input shaft; 3-sun gear; 4-planet wheels; 5-a first input shaft drive gear; 6-a large gear ring; 7-a first driven gear; 8-an intermediate shaft; 9-a second driven gear; 10-a third driven gear; 11-differential gear; 12-a differential; 13-half shafts; 14-wheels; 15-a second drive motor; 16-housing gear; 17-a second input shaft; 18-a first sliding sleeve; 19-a second input shaft drive gear; 20-idler; 21-a planet carrier; 22-a first hollow shaft gear; 23-a second sliding sleeve; 24-a second hollow shaft gear; 25-a force taking output shaft; 26-a flange plate; 27-a third sliding sleeve; 28-a power take-off driving wheel; 29-force-taking driven wheel; 30-output shaft.

Detailed Description

In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The invention is described in further detail below with reference to the attached drawing figures:

the invention provides a novel integrated electric drive axle assembly for solving the technical problems of the existing electric drive axle system. The assembly redistributes the power of the double motors through the planetary gear train structural arrangement, and meets the requirements of running and auxiliary operation of the vehicle under different working conditions.

As shown in fig. 1, the invention provides a novel integrated electric drive axle assembly, a first drive motor 1 is connected with a first input shaft driving gear 5 through a first input shaft 2, a planetary gear train bull gear 6 is meshed with the first input shaft driving gear 5, a second hollow shaft gear 24 is sleeved on the bull gear 6 in an empty mode, a third sliding sleeve 27 is connected with the bull gear 6, two ends of an intermediate shaft 8 are respectively connected with a second driven gear 9 and a third driven gear 10, the second driven gear 9 is meshed with the second hollow shaft gear 24, the third driven gear 10 is meshed with a differential gear 11, the differential gear 11 is fixedly connected with a differential gear 12, and the differential gear 12 is connected with wheels 14 through two side half shafts 13; the second driving motor 15 is connected with a second input shaft driving gear 19 through a second input shaft 17, a force taking output shaft 25 is coaxially arranged with the second input shaft 17, and the end part of the force taking output shaft 25 is connected with a flange 26; the idler 20 is meshed with the second input shaft driving gear 19 and the sun gear 3 respectively, the planet gears 4 are meshed with the sun gear 3 and the bull gear 6 respectively, one end of the planet carrier 21 is connected with the planet gears 4, the other end of the planet carrier is connected with the first sliding sleeve 18, and the first sliding sleeve 18 can be combined with and separated from the shell gear 16 in a sliding mode.

The novel integrated electric drive axle assembly has seven modes of operation, as shown in table 1. The first driving motor 1 is operated, the second driving motor 15 is not operated, the first sliding sleeve 18 is controlled to be separated from the shell gear 16, the third sliding sleeve 27 is controlled to shift leftwards, and the electric drive bridge is operated in a mode. The specific transmission route is as follows: the power of the first driving motor 1 passes through the first input shaft 2, the first input shaft driving gear 5, the bull gear 6, the third sliding sleeve 27, the second hollow shaft gear 24, the second driven gear 9, the intermediate shaft 8, the third driven gear 10 and the differential gear 11 to reach the differential 12, and then the differential 12 in the driving axle transmits the power to the wheels 14 through the half shafts 13 to drive the vehicle to run.

The electric drive bridge works in other modes by controlling the first drive motor 1, the second drive motor 15, and the first sliding sleeve 18 to be separated from or combined with the housing gear 16 and the left and right sliding position of the third sliding sleeve 27, and the above-mentioned processes are similar, and will not be repeated here.

The first gear in the scheme provides three-level large-speed-ratio speed reduction transmission and can be used for low-speed large-torque power output; the second gear provides the shortest mechanical transmission path, has high transmission efficiency and is suitable for low-load power driving in the full speed range. According to the novel integrated electric drive axle assembly, through gear switching, the power output from low-speed large torque to full-speed low torque can be realized by adopting the small-torque motor, and compared with the large-torque motor matched in the prior art, the cost can be effectively reduced.

Table 1 example 1 electric drive bridge mode of operation

Mode	First driving motor	Second driving motor	First sliding sleeve	Third sliding sleeve	Vehicle operating state
						Mode one	Work of	Is not working	Separation	To the left	Single motor 1 gear running
Mode two	Work of	Is not working	Separation	To the right	Single motor 2-gear running
						Mode three	Work of	Work of	Bonding of	To the left	Double-motor 1-gear running
Mode four	Work of	Work of	Bonding of	To the right	Double-motor 2-gear running
						Mode five	Work of	Work of	Separation	To the left	1-gear running and operation
Mode six	Work of	Work of	Separation	To the right	2-gear running and operation
						Mode seven	Is not working	Work of	Separation	Neutral gear	Parking work

Through the technical route of the invention, the transmission modes with more gears can be realized, and the high-speed and large-torque power transmission is further realized. As shown in fig. 2, a three-gear transmission mode can be realized by adding a pair of gear pair first hollow shaft gear 22 and first driven gear 7, and second sliding

sleeve

23, and 10 kinds of operation modes can be realized in total by controlling the first driving motor 1, the second driving motor 15, and the first sliding sleeve 18 to be separated from or combined with the housing gear 16, and the second sliding sleeve 23 and the third sliding sleeve 27 to slide left and right, as shown in table 2. Likewise, the highest gear provides the shortest mechanical transmission path and highest transmission efficiency.

Table 2 example 2 electric drive bridge mode of operation

Further, as shown in fig. 3 and 4, the primary gear pair power taking driving wheel 28 and the power taking driven wheel 29 are used for realizing speed reduction, torque increase and reversing, and the auxiliary power output direction can be horizontally or longitudinally arranged according to the arrangement requirement of the auxiliary device of the whole vehicle.

The above is only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited by this, and any modification made on the basis of the technical scheme according to the technical idea of the present invention falls within the protection scope of the claims of the present invention.

Claims

1. An integrated electric drive axle assembly, comprising: the first driving motor (1) and the second driving motor (15), the first driving motor (1) is connected with a first input shaft driving gear (5) through a first input shaft (2), the first input shaft driving gear (5) is meshed with a large gear ring (6), the large gear ring (6) is connected with a third sliding sleeve (27), a second hollow shaft gear (24) is sleeved above the large gear ring (6), the second hollow shaft gear (24) is meshed with a second driven gear (9), the second driven gear (9) is arranged at one end of an intermediate shaft (8), the other end of the second driven gear is connected with a third driven gear (10), the third driven gear (10) is meshed with a differential gear (11), the differential gear (11) is fixedly connected with a differential gear (12), and the differential gear (12) is connected with wheels (14) through half shafts (13);

the second driving motor (15) is connected with a second input shaft driving gear (19) through a second input shaft (17), the second input shaft (17) is coaxially arranged with a force taking output shaft (25), and the end part of the force taking output shaft (25) is connected with a flange plate (26); the second input shaft driving gear (19) is meshed with one side of the idler gear (20), the other side of the idler gear (20) is meshed with the sun gear (3), the sun gear (3) is meshed with the planet gear (4), the planet gear (4) is meshed with the large gear ring (6), the planet gear (4) is arranged at one end of the planet carrier (21), the other end of the planet carrier (21) is connected with the first sliding sleeve (18), the first sliding sleeve (18) is in contact with the shell gear (16), and the first sliding sleeve (18) can be separated from the shell gear (16).

2. An integrated electric drive axle assembly according to claim 1, characterized in that, when three gears are driven, the intermediate shaft (8) is connected to one end of the second driven gear (9), and after extension, the end is connected to the first driven gear (7), the first driven gear (7) is meshed with the first hollow shaft gear (22), and a second sliding sleeve (23) is arranged between the second hollow shaft gear (24) and the first hollow shaft gear (22).

3. An integrated electric drive axle assembly according to claim 1, characterized in that when decelerating and increasing torsion and reversing, the power take-off driving wheel (28) is connected to one end of the second input shaft (17) connected to the flange (26), the power take-off driving wheel (28) is meshed with the power take-off driven wheel (29) through straight teeth, and the power take-off driven wheel (29) is connected to the flange (26) through the output shaft (30).

4. An integrated electric drive axle assembly according to claim 3, characterized in that the power take-off driving wheel (28) is in conical toothing with the power take-off driven wheel (29), and the output shaft (30) is arranged perpendicular to the second input shaft (17).

5. An integrated electric drive axle assembly according to claim 1, characterized in that when driving in single motor first gear, the first drive motor (1) is active and the second drive motor (15) is not active, the first sliding sleeve (18) is separated from the housing gear (16), and the third sliding sleeve (27) is engaged to the left.

6. An integrated electric drive axle assembly according to claim 1, characterized in that when driving in single motor second gear, the first drive motor (1) is active and the second drive motor (15) is not active, the first sliding sleeve (18) is separated from the housing gear (16), and the third sliding sleeve (27) is engaged to the right.

7. An integrated electric drive axle assembly according to claim 1, characterized in that when driving in double motor first gear, the first drive motor (1) is operated, the second drive motor (15) is operated, the first sliding sleeve (18) is not separated from the housing gear (16), and the third sliding sleeve (27) is engaged to the left.

8. An integrated electric drive axle assembly according to claim 1, characterized in that when driving in two gears with two motors, the first drive motor (1) is operated and the second drive motor (15) is operated, the first sliding sleeve (18) is not separated from the housing gear (16), and the third sliding sleeve (27) is engaged to the right.

9. An integrated electric drive axle assembly according to claim 1, characterized in that the first drive motor (1) is operated and the second drive motor (15) is operated when the vehicle is traveling and operating in first gear, the first sliding sleeve (18) is separated from the housing gear (16), and the third sliding sleeve (27) is engaged to the left.

10. An automobile comprising an integrated electric drive axle assembly as claimed in any one of claims 1 to 9.