CN214492502U

CN214492502U - Integrated two keep off electric drive axle

Info

Publication number: CN214492502U
Application number: CN202120038356.XU
Authority: CN
Inventors: 张庆鹏; 徐秀良; 赵飞翔; 许电波; 王坤玉; 曹洋洋; 李彬; 宋莉; 公彦峰; 陈冠中
Original assignee: China National Heavy Duty Truck Group Jinan Power Co Ltd
Current assignee: Sinotruk Jinan Power Co Ltd; China National Heavy Duty Truck Group Jinan Power Co Ltd
Priority date: 2021-01-07
Filing date: 2021-01-07
Publication date: 2021-10-26
Anticipated expiration: 2031-01-07

Abstract

The utility model discloses an integrated form two keep off electric transaxles, including driving motor, driving motor is connected with first gear drive deceleration module, first gear drive deceleration module passes through gear engagement and is connected with second gear drive deceleration module, second gear drive deceleration module passes through gear engagement and third gear drive deceleration module meshing, the gear idle cover of third gear drive deceleration module is on the jackshaft, and third gear drive deceleration module is connected with the speed change module of shifting of installing on the jackshaft, and jackshaft and planet deceleration module's sun gear fixed connection, planet deceleration module's planet carrier and differential mechanism are connected, differential mechanism's both sides are connected with left semi-axis and right semi-axis respectively, the idle cover of jackshaft is on left semi-axis. The utility model discloses beneficial effect lies in being integrated as an organic whole with the motor and the axle degree of depth, has alleviateed the weight of axle assembly by a wide margin to reduce the energy resource consumption of whole car, promoted whole car space.

Description

Integrated two keep off electric drive axle

Technical Field

The utility model belongs to electric drive axle assembly field relates to an use electric drive axle on new forms of energy light truck, passenger train, heavy truck and special type car, especially an integrated form keeps off electric drive axle.

Background

From the technical development trend of new energy automobile electric drive systems at home and abroad, the development is generally towards the integration and integration of power systems. In domestic and foreign vehicle enterprises such as Tesla, general use, daily product, China first steam, Dongfeng, Changan and the like, a driving motor, a gearbox, a speed reducer, an axle and the like are integrated as electric drive assembly products. Through the integrated design, can further reduce the volume weight of assembly on the one hand, improve power, volume, the moment of torsion density of system, on the other hand promotes the NVH level of electric drive assembly through integrating with the matching that becomes more meticulous, and the serialization of being convenient for, mass production improve the commonality of product and reduce development and manufacturing cost.

However, most of the conventional commercial vehicle electric drive axles with new energy adopt the scheme that the motor is matched with an AMT (automated mechanical transmission) and a reducer is matched with the motor, and the scheme is a single-motor scheme, so that the system integration level is low, and the power assembly occupies large space, is large in weight and has no cost advantage in scale.

Disclosure of Invention

An object of the utility model is to the lower defect of system integration among the prior art, propose and designed an integrated form two fender drive axle, make power system compacter, drive axle's space, weight reduce, improve product core competitiveness.

In order to achieve the above object, the present invention provides the following technical solutions: an integrated two-gear drive axle comprises a drive motor fixedly mounted on an axle housing, wherein an output shaft of the drive motor is fixedly connected with a first gear transmission speed reduction module shaft of a first gear transmission speed reduction module, the first gear transmission speed reduction module is connected with a second gear transmission speed reduction module through gear meshing, the second gear transmission speed reduction module is meshed with a third gear transmission speed reduction module through gear meshing, a gear of the third gear transmission speed reduction module is sleeved on an intermediate shaft in an empty mode, a speed change and gear shift module is arranged on the intermediate shaft and connected with the third gear transmission speed reduction module, the intermediate shaft is fixedly connected with a sun gear of a planetary speed reduction module, a gear ring of the planetary speed reduction module is fixedly connected with the axle housing, and a planet carrier of the planetary speed reduction module is fixedly connected with a differential mechanism shell of a differential mechanism, the differential mechanism shell is rotatably connected with the axle housing, two sides of the differential mechanism are respectively connected with the left half shaft and the right half shaft, and the middle shaft is sleeved on the left half shaft in an empty mode. Thus, the electric drive axle integrates the motor and the axle deeply, greatly reduces the weight of the axle assembly and reduces the energy consumption of the whole vehicle; the space of the whole vehicle is improved.

The utility model discloses a further improvement still, third gear drive speed reduction module includes third gear drive speed reduction module gear one and third gear drive speed reduction module gear two, third gear drive speed reduction module gear one and two difference fixed mounting of third gear drive speed reduction module gear are on third gear drive speed reduction module axle two and third gear drive speed reduction module axle one, third gear drive speed reduction module axle two and third gear drive speed reduction module axle one cover on the jackshaft all empty. The electric drive bridge can change the integral transmission ratio by selecting gears with different tooth numbers, and realize the gear shifting of the wheels.

The utility model discloses a further improvement still, all be provided with on third gear drive speed reduction module gear one and the third gear drive speed reduction module gear two and combine the ring gear, the variable speed module of shifting is installed between third gear drive speed reduction module gear one and third gear drive speed reduction module gear two, just variable speed module of shifting slidable mounting is on the jackshaft, the combination cover of shifting of variable speed module of shifting cooperatees with combining the ring gear. Therefore, the gear shifting combination sleeve outer gear ring can be respectively combined with and separated from two gears of the third gear transmission speed reduction module through the gear shifting fork and the gear shifting actuating mechanism, namely 3 different relative motion states with the intermediate shaft are realized, namely when the gear shifting combination sleeve is meshed with different gears, two gear shifting speed ratios can be realized; when the gear shifting combination sleeve is in the middle position of the two gears, the wheels are in a power interruption state, namely a neutral gear state.

The utility model discloses a further improvement still, the epaxial first gear transmission speed reduction module gear that is provided with of first gear transmission speed reduction module. And transmitting the power generated by the driving mechanism to the second gear transmission speed reduction module.

The utility model discloses a further improvement still, second gear drive speed reduction module includes second gear drive speed reduction module axle, the epaxial second gear drive speed reduction module gear second and the second gear drive speed reduction module gear third of being provided with of second gear drive speed reduction module, second gear drive speed reduction module gear second meshes with the third gear drive speed reduction module gear of third gear drive speed reduction module, the third gear drive speed reduction module gear of second gear drive speed reduction module gear third and third gear drive speed reduction module gear second meshes. Therefore, two transmission ratios can be generated between the second gear transmission speed reduction module and the third gear transmission speed reduction module according to different gear tooth numbers, so that the wheels can have two different vehicle speeds.

The utility model discloses a further improvement still, second gear drive speed reduction module gear two and first gear drive speed reduction module's first gear drive speed reduction module gear engagement. The power of the first gear reduction module is transmitted to the second gear reduction module.

The utility model discloses a further improvement still has, the epaxial second gear drive speed reduction module gear that still is provided with of second gear drive speed reduction module, first and first gear drive speed reduction module gear engagement of first gear drive speed reduction module of second gear drive speed reduction module gear. The power of the first gear reduction module is transmitted to the second gear reduction module.

The utility model discloses a further improvement still, left side semi-axis and left wheel fixed connection, right side semi-axis and right wheel fixed connection. The left wheel and the right wheel are respectively controlled by the left half shaft and the right half shaft.

The utility model discloses a further improvement still, the second gear drive speed reduction module axle and the countershaft parallel arrangement of the first gear drive speed reduction module axle of first gear drive speed reduction module, second gear drive speed reduction module effectively reduce the focus of whole electric drive axle assembly.

The utility model has the advantages that the electric drive bridge of the utility model greatly reduces the weight of the bridge assembly and reduces the energy consumption of the whole vehicle by integrating the motor and the depth of the vehicle axle into a whole; the space of the whole vehicle is improved. And the self-powered assembly system simplifies the design of the chassis of the whole vehicle, saves the space of the chassis and reduces the noise. In addition, the electric drive axle is beneficial to realizing the modularization of a drive motor system, and is convenient for realizing the serialization expansion of axles with different tonnages.

Furthermore, the utility model relates to a principle is reliable, and simple structure has very extensive application prospect.

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 for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a first embodiment of the present invention.

Fig. 2 is a schematic view of the structure of the gear transmission portion in fig. 1.

Fig. 3 is a schematic structural diagram of a second gear reduction module according to a second embodiment of the present invention.

FIG. 4 is a schematic diagram of the third gear reduction module and the planetary reduction module of FIG. 1.

In the figure, 1, a driving motor, 2, a first gear transmission speed reducing module, 2-1, a first gear transmission speed reducing module shaft, 2-2, a first gear transmission speed reducing module gear, 3, a second gear transmission speed reducing module, 3-0, a first gear transmission speed reducing module gear, 3-1, a second gear transmission speed reducing module gear, 3-2, a third gear transmission speed reducing module gear, 3-3, a second gear transmission speed reducing module shaft, 4, a third gear transmission speed reducing module, 4-1, a first gear transmission speed reducing module shaft, 4-2, a second gear transmission speed reducing module shaft, 4-3, a first gear transmission speed reducing module gear, 4-4, a second gear transmission speed reducing module gear, 5, an intermediate shaft, 6 and a planetary speed reducing module, 6-1, a sun gear, 6-2, a planet carrier, 6-3, a gear ring, 7, a right wheel, 8, a right half shaft, 9, a differential, 9-1, a differential shell, 10, a speed change and gear shift module, 11, a left half shaft, 12 and a left wheel.

Detailed Description

In order to make the technical solutions in the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.

The following explains key terms appearing in the present invention.

As shown in fig. 1, the first one of the two-gear drive axle of the present invention is an embodiment, which includes an axle housing and a driving motor 1 distributed on one side of the axle, wherein the output shaft of the driving motor 1 is connected to the first gear transmission speed reduction module shaft 2-1 of the first gear transmission speed reduction module 2 through a connecting spline. The first gear transmission speed reduction module shaft 2-1 is provided with a first gear transmission speed reduction module gear 2-2 through a spline, the first gear transmission speed reduction module gear 2-2 is meshed with a second gear transmission speed reduction module gear 3-1 of a second gear transmission speed reduction module 3, the second gear transmission speed reduction module gear 3-1 is arranged on the second gear transmission speed reduction module shaft 3-3 through a spline, and the second gear transmission speed reduction module shaft 3-3 is further provided with a second gear transmission speed reduction module gear three 3-2. The second gear transmission speed reduction module gear 3-1 and the second gear transmission speed reduction module gear 3-2 are also respectively meshed with a third gear transmission speed reduction module gear 4-3 and a third gear transmission speed reduction module gear 4-4 of a third gear transmission speed reduction module 4. The first gear transmission speed reduction module gear 4-3 and the second gear transmission speed reduction module gear 4-4 are respectively arranged on the second gear transmission speed reduction module shaft 4-2 and the first gear transmission speed reduction module shaft 4-1. Furthermore, the axis of the second gear transmission speed reduction module shaft 4-2 and the axis of the first gear transmission speed reduction module shaft 4-1 are a straight line, two ends of the second gear transmission speed reduction module shaft 4-2 and two ends of the first gear transmission speed reduction module shaft 4-1 are fixed on the axle housing through bearings, and the second gear transmission speed reduction module shaft 4-2 and the first gear transmission speed reduction module shaft 4-1 are also sleeved on the middle shaft 5 in an empty mode.

Furthermore, a combination gear ring is arranged on one side of the third gear transmission speed reduction module gear I4-3 opposite to the third gear transmission speed reduction module gear II 4-4. Still be provided with variable speed module 10 of shifting between two sets of gears of third gear drive speed reduction module 4, variable speed module 10 of shifting is including the combination cover of shifting, the combination cover of shifting can with combine the ring gear meshing. Preferably, the shift coupling sleeve is slidably mounted on a splined hub, which is splined to the intermediate shaft 5. And a planetary reduction module 6 and a differential mechanism 9 are also arranged on one side of the third gear transmission reduction module 4. One end of the intermediate shaft 5 is connected with a sun gear 6-1 of the planetary reduction module 6, a gear ring 6-3 of the planetary reduction module 6 is fixedly mounted on an axle housing, and a planet carrier 6-2 of the planetary reduction module 6 is fixedly connected with a differential case 9-1. The differential case 9-1 is rotatably mounted on the axle housing via a differential support. Differential mechanism 9's both sides are connected with left semi-axis 11 and right semi-axis 8 through side gear respectively, and wherein side gear and semi-axis fixed connection or be an organic whole piece, left side semi-axis 11 and right semi-axis 8 are all installed on the axle housing through the bearing, just the axis of left side semi-axis 11 and right semi-axis 8 is a straight line with the axis of jackshaft 5, jackshaft 5 cover is established at left semi-axis 11. One end of the left half shaft 11 and one end of the right half shaft 8 are also respectively connected with the left wheel 12 and the right wheel 7.

As shown in fig. 3, the structural schematic diagram of the second gear reduction module in the second embodiment of the present invention is different from the integrated two-gear drive axle shown in fig. 1 in that, in the second embodiment of the integrated two-gear drive axle, three gears are installed on the second gear reduction module shaft 3-3 of the second gear reduction module 3, wherein the first gear reduction module gear 3-0 is engaged with the first gear reduction module gear 2-2, and the second gear reduction module gear 3-1 and the second gear reduction module gear 3-2 are both engaged with the gear in the third gear reduction module 4.

In addition, the drive motor 1 of the present invention includes a rotor rotatable about an axis. The rotor may be splined to a first geared reduction module shaft 2-1 of the first geared reduction module 2. The stator of driving motor 1 and the motor power output end of casing all are provided with the screw hole, can hold the carrier with driving motor 1 and the axle housing above through the bolt and be connected. The driving motor 1 is further provided with a set of active cooling liquid cooling system, the liquid cooling system comprises a cooling water channel, and the cooling driving piece can be used for driving cooling liquid to flow circularly. Further, differential mechanism that installs on the axle housing holds carrier and planet gear reduction module and holds carrier and be the integral type and dash the weldment, both sides respectively are provided with one and can hold the opening that third gear drive reduction module held carrier around two integral types dash the weldment middle part, third gear drive reduction module holds carrier demountable installation in the opening of integral type dashes the weldment in.

In addition, in order to collect the wheel rotation speed, provide a vehicle speed signal for the whole vehicle and provide a rotation speed reference for a gear shifting control strategy, a gear ring is further arranged on the differential case 9-1, and a non-contact vehicle speed sensor capable of sensing the rotation of the gear ring is arranged on the axle housing; in order to meet the requirements of driving and parking braking, a corresponding brake, an air chamber, a brake mounting plate and a required ABS sensor assembly related mounting structure and an interface are further arranged on the axle housing; in order to meet the bearing capacity of the axle housing and the stable connection between the axle housing and the frame, the axle housing is also provided with a mounting structure and an interface for mounting a relevant plate spring, a thrust rod, a stabilizer bar, a wheel hub and the like; in order to meet the arrangement of the driving motor 1 and related sensor high-low voltage wiring harnesses and cooling water pipes, the axle housing is further provided with related mounting fixing points or bracket mounting points.

Although the present invention has been described in detail by referring to the drawings in conjunction with the preferred embodiments, the present invention is not limited thereto. Various equivalent modifications or substitutions can be made on the embodiments of the present invention by those skilled in the art without departing from the spirit and substance of the present invention, and these modifications or substitutions are intended to be within the scope of the present invention/any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. An integrated two-gear drive axle is characterized by comprising a drive motor (1) fixedly mounted on an axle housing, wherein an output shaft of the drive motor (1) is fixedly connected with a first gear transmission speed reduction module shaft (2-1) of a first gear transmission speed reduction module (2), the first gear transmission speed reduction module (2) is connected with a second gear transmission speed reduction module (3) through gear meshing, the second gear transmission speed reduction module (3) is connected with a third gear transmission speed reduction module (4) through gear meshing, a gear of the third gear transmission speed reduction module (4) is freely sleeved on an intermediate shaft (5), a speed change and gear shift module (10) is further arranged on the intermediate shaft (5), the speed change and gear shift module (10) is connected with the third gear transmission speed reduction module (4), and the intermediate shaft (5) is fixedly connected with a sun gear (6-1) of a planetary speed reduction module (6), the ring gear and the axle housing fixed connection of planet speed reduction module (6), planet carrier (6-2) and differential mechanism (9) of planet speed reduction module (6) differential mechanism shell (9-1) fixed connection, differential mechanism shell (9-1) and axle housing rotatable coupling, the both sides of differential mechanism (9) are connected with left semi-axis (11) and right semi-axis (8) respectively, jackshaft (5) empty cover is on left semi-axis (11).

2. An integrated two-gear drive axle according to claim 1, wherein the third gear reduction module (4) comprises a first gear reduction module gear (4-3) and a second gear reduction module gear (4-4), the first gear reduction module gear (4-3) and the second gear reduction module gear (4-4) are respectively fixedly mounted on the second gear reduction module shaft (4-2) and the first gear reduction module shaft (4-1), and the second gear reduction module shaft (4-2) and the first gear reduction module shaft (4-1) are both freely sleeved on the intermediate shaft (5).

3. An integrated two-gear drive axle according to claim 2, wherein the third gear reduction module gear (4-3) and the third gear reduction module gear (4-4) are provided with a coupling ring gear, the gearshift module (10) is mounted between the third gear reduction module gear (4-3) and the third gear reduction module gear (4-4), and the gearshift module (10) is slidably mounted on the countershaft (5), and the shift coupling sleeve of the gearshift module (10) is capable of coupling with the coupling ring gear.

4. An integrated two-gear drive axle according to claim 1, characterized in that a first gear reduction module gear (2-2) is arranged on the first gear reduction module shaft (2-1) of the first gear reduction module (2).

5. An integrated two-gear drive axle according to claim 1, wherein the second gear transmission deceleration module (3) comprises a second gear transmission deceleration module shaft (3-3), the second gear transmission deceleration module shaft (3-3) is provided with a second gear transmission deceleration module gear (3-1) and a second gear transmission deceleration module gear (3-2), the second gear transmission deceleration module gear (3-1) is engaged with a third gear transmission deceleration module gear (4-3) of a third gear transmission deceleration module (4), and the second gear transmission deceleration module gear (3-2) is engaged with a third gear transmission deceleration module gear (4-4) of the third gear transmission deceleration module (4).

6. An integrated two-gear drive axle according to claim 5, characterized in that the second geared reduction module gear wheel two (3-1) meshes with the first geared reduction module gear wheel (2-2) of the first geared reduction module (2).

7. An integrated two-gear drive axle according to claim 5, wherein the second gear transmission deceleration module shaft (3-3) is further provided with a second gear transmission deceleration module gear one (3-0), and the second gear transmission deceleration module gear one (3-0) is meshed with the first gear transmission deceleration module gear (2-2) of the first gear transmission deceleration module (2).

8. An integrated two-gear drive axle according to claim 1, characterized in that the left half-shaft (11) is fixedly connected to a left wheel (12) and the right half-shaft (8) is fixedly connected to a right wheel (7).

9. An integrated two-gear drive axle according to claim 1, characterized in that the first gear reduction module axle (2-1) of the first gear reduction module (2), the second gear reduction module axle (3-3) of the second gear reduction module (3) and the intermediate axle (5) are arranged in parallel.