阅读说明：本技术 悬架集成自动变速箱的电驱动桥总成 (Electric drive axle assembly of suspension integrated automatic gearbox ) 是由 曾洋洋 李杨 龚炫 胡胜利 邵庆刚 刘景凯 卢金良 陈选楠 于 2018-08-21 设计创作，主要内容包括：一种悬架集成自动变速箱的电驱动桥总成,主要用于纯电动汽车制造。采用断开式结构,左、右两边的悬架通过橡胶球铰结构与副车架连接,实现左、右轮端运动的独立。本发明将驱动电机、自动变速箱、轮端、独立悬架结构进行集成,取消了传统的传动轴结构,使系统得到了简化,该桥总成结构布置紧凑,缩短了传动链,提高了传动效率；副车架结构保证了动力系统的安装和固定,而且增加了桥总成通用性；带两档自动变速箱,可实现换挡调速；而且由于悬架采用的是C型臂独立悬架结构,所以能够满足低底板需求,同时也提高了车辆的操纵稳定性和平顺性。(An electric drive axle assembly of a suspension integrated automatic gearbox is mainly used for manufacturing pure electric vehicles. The suspension frames on the left side and the right side are connected with the auxiliary frame through rubber ball hinge structures by adopting a disconnected structure, so that the independent motion of the left wheel end and the right wheel end is realized. The invention integrates the driving motor, the automatic gearbox, the wheel end and the independent suspension structure, cancels the traditional transmission shaft structure, simplifies the system, has compact structural arrangement of the axle assembly, shortens the transmission chain and improves the transmission efficiency; the auxiliary frame structure ensures the installation and fixation of the power system and increases the universality of the bridge assembly; the automatic gearbox with two gears can realize gear shifting and speed regulation; and because the suspension adopts the C-shaped arm independent suspension structure, the requirement of a low bottom plate can be met, and the operation stability and the smoothness of the vehicle are improved.)

1. An electric drive axle assembly of a suspension integrated automatic gearbox is characterized in that: the axle assembly adopts a disconnected structure, and the suspension frames on the left side and the right side are connected with the auxiliary frame (2) through rubber ball hinge structures, so that the motion independence of the left wheel end and the right wheel end is realized.

2. The electric transaxle assembly of a suspension-integrated automatic transmission according to claim 1, wherein: the auxiliary frame (2) is connected with a driving motor (3), and the axis of the driving motor (3) is parallel to the direction of the axle; the input end of an automatic gearbox (8) internally provided with a speed reducer and a differential mechanism is connected with the output end of a driving motor (3) through a spline, the output end of the automatic gearbox (8) is connected with a universal joint input shaft (12) of a right universal joint (4) and a left universal joint (7), and a universal joint output shaft (11) penetrates through a flange plate of a U-shaped swing arm (6) and is respectively connected with a wheel end half shaft (15); the U-shaped swing arms (6) on the two sides of the auxiliary frame (2) are connected with the auxiliary frame (2) through spherical hinge bushings (16), and the U-shaped swing arms (6) can swing around the axes of the spherical hinge bushings (16); a flange plate of the U-shaped swing arm (6) is tightly connected with one side of the C-shaped arm (1) through a bolt, a braking bottom plate (17) is fixedly arranged on the other side of the C-shaped arm (1), and a bearing is arranged between the braking bottom plate (17) and the driven cylindrical gear (14); the wheel hub (18) is connected with the wheel end half shaft (15) through bolts; the tail end of the C-shaped arm (1) is provided with a shock absorber (10), and the secondary tail end is provided with an air spring (9); the power of the electric drive axle assembly is output through the output end of the drive motor (3), enters the automatic gearbox (8), is transmitted to the universal joint input shaft (12) after being decelerated and torque-increased, and is sequentially transmitted to the driving cylindrical gear (13), the driven cylindrical gear (14) and the wheel end half shaft (15) through the universal joint output shaft (11), so that the wheel hub (18) is driven to rotate.

3. The electric transaxle assembly of a suspension-integrated automatic transmission according to claim 1, wherein: four bolt holes at the tail end of the auxiliary frame (2) are interfaces connected with the main frame, and the driving motor (3) and the automatic gearbox (8) are indirectly connected with the main frame through the auxiliary frame (2).

4. The electric transaxle assembly of a suspension-integrated automatic transmission according to claim 1, wherein: the universal joint output shaft (11) and the wheel end half shaft (15) are not coaxially arranged and are in transitional connection through a driving cylindrical gear (13) and a driven cylindrical gear (14).

5. The electric transaxle assembly of a suspension integrated two-speed automatic transmission of claim 1 wherein: the installation position of the shock absorber (10) and the air spring (9) is lower than the height of the axis of the hub (18).

Technical Field

The invention relates to the technical field of automobile manufacturing, in particular to an electric drive axle assembly of an integrated automatic gearbox of a C-shaped arm independent suspension for a pure electric automobile.

Background

To meet the market demand of new energy vehicles, more and more vehicle manufacturers are trying to use an electric motor instead of an engine to provide power in the development of new vehicle models. At present, most of pure electric vehicles adopt an integral rigid bridge of a traditional vehicle and a motor externally-hung structure, so that the transmission efficiency of the structure is low, the power loss and the occupied space are large, and the arrangement of batteries is even influenced, so that the driving range of the vehicle is short; on the other hand, because the integral rigid axle is adopted, the left wheel and the right wheel are mutually influenced, and the maneuverability and the comfort of the vehicle are reduced.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide an electric drive axle assembly of a suspension integrated automatic gearbox, so as to improve the transmission efficiency and the operation stability and smoothness of a vehicle.

In order to achieve the aim, the axle assembly adopts a disconnected structure, and the suspension frames on the left side and the right side are connected with the auxiliary frame through rubber ball hinge structures, so that the independent movement of the left wheel end and the right wheel end is realized.

The auxiliary frame is connected with a driving motor, and the axis of the driving motor is parallel to the direction of the axle; the input end of an automatic gearbox internally provided with a speed reducer and a differential mechanism is connected with the output end of a driving motor through splines, the output end of the automatic gearbox is connected with a universal joint input shaft, and a universal joint output shaft passes through a flange plate of a U-shaped swing arm and is respectively connected with a wheel end half shaft; the U-shaped swing arms on the two sides of the auxiliary frame are connected with the auxiliary frame through spherical hinge bushings, and the U-shaped swing arms can swing around the axes of the spherical hinge bushings; the flange of the U-shaped swing arm is tightly connected with one side of the C-shaped arm through a bolt, the other side of the C-shaped arm is fixedly provided with a braking bottom plate, and a bearing is arranged between the braking bottom plate and the driven cylindrical gear; the wheel hub is connected with the wheel end half shaft through bolts; the tail end of the C-shaped arm is provided with a shock absorber, and the secondary tail end of the C-shaped arm is provided with an air spring; the power of the electric drive axle assembly is output through the output end of the drive motor, enters the automatic gearbox, is transmitted to the universal joint input shaft after being subjected to speed reduction and torque increase, and is sequentially transmitted to the driving cylindrical gear, the driven cylindrical gear and the wheel end half shaft through the universal joint output shaft, so that the wheel hub is driven to rotate.

And four bolt holes at the tail end of the auxiliary frame are interfaces connected with the main frame, and the driving motor and the automatic gearbox are indirectly connected with the main frame through the auxiliary frame.

The universal joint output shaft and the wheel end half shaft are not coaxially arranged and are in transitional connection through a driving cylindrical gear and a driven cylindrical gear.

The installation position of the shock absorber and the air spring is lower than the height of the axis of the hub.

Compared with the prior art, the invention integrates the driving motor, the automatic gearbox, the wheel end and the independent suspension structure, cancels the traditional transmission shaft structure, simplifies the system, has compact structural arrangement of the bridge assembly, shortens the transmission chain and improves the transmission efficiency; the auxiliary frame structure ensures the installation and fixation of the power system and increases the universality of the bridge assembly; the automatic gearbox with two gears can realize gear shifting and speed regulation; and because the suspension adopts the C-shaped arm independent suspension structure, the requirement of a low bottom plate can be met, and the operation stability and the smoothness of the vehicle are improved.

Drawings

Fig. 1 is a top view of the present invention.

Fig. 2 is a front view of the present invention.

Figure 3 is a partial cross-sectional view of the wheel end of figure 1.

In the figure: 1-C arm; 2-auxiliary frame; 3-driving a motor; 4-right end universal joint; 5-wheel end; 6-U-shaped swing arms; 7-left end universal joint; 8-automatic gearbox; 9-an air spring; 10-a shock absorber; 11-universal joint output shaft, 12-universal joint input shaft; 13-driving cylindrical gear; 14-driven cylindrical gear; 15-wheel end half shaft; 16-ball hinge bush; 17-a brake backing plate; 18-hub.

Detailed Description

As shown in figures 1, 2 and 3, the axle assembly of the invention adopts a disconnected structure, the suspension frames on the left side and the right side are connected with the auxiliary frame 2 through rubber ball hinge structures, so that the wheel runout independence of the left wheel end and the right wheel end is realized, and the power of the axle assembly is output by the driving motor 3, is reduced in speed and increased in torque through the two-gear automatic gearbox 8 and then is input to the wheel end 5.

The auxiliary frame 2 is connected with a driving motor 3, and the axis of the driving motor 3 is parallel to the direction of the axle; the input end of an automatic gearbox 8 internally provided with a speed reducer and a differential mechanism is connected with the output end of a driving motor 3 through a spline, the output end of the automatic gearbox 8 is connected with a right universal joint 4 and a universal joint input shaft 12 of a left universal joint 7, and a universal joint output shaft 11 penetrates through a flange plate of a U-shaped swing arm 6 and is respectively connected with a wheel end half shaft 15; the U-shaped swing arms 6 on the two sides of the auxiliary frame 2 are connected with the auxiliary frame 2 through spherical hinge bushings 16, and the U-shaped swing arms 6 can swing around the axes of the spherical hinge bushings 16; a flange plate of the U-shaped swing arm 6 is tightly connected with one side of the C-shaped arm 1 through a bolt, the other side of the C-shaped arm 1 is fixedly provided with a braking bottom plate 17, and a bearing is arranged between the braking bottom plate 17 and the driven cylindrical gear 14; the wheel hub 18 is connected with the wheel end half shaft 15 through bolts; the tail end of the C-shaped arm 1 is provided with a shock absorber 10, and the secondary tail end is provided with an air spring 9; the power of the electric drive axle assembly is output through the output end of the driving motor 3, enters the automatic gearbox 8, is transmitted to the universal joint input shaft 12 after being subjected to speed reduction and torque increase, and is sequentially transmitted to the driving cylindrical gear 13, the driven cylindrical gear 14 and the wheel end half shaft 15 through the universal joint output shaft 11, so that the wheel hub 18 is driven to rotate, and the large-speed-ratio transmission can be realized through three-stage speed reduction in the whole process.

Four bolt holes at the tail end of the auxiliary frame 2 are interfaces connected with the main frame, and the driving motor 3 and the automatic gearbox 8 are indirectly connected with the main frame through the auxiliary frame 2.

The universal joint output shaft 11 and the wheel end half shaft 15 are not coaxially arranged and are in transitional connection through a driving cylindrical gear 13 and a driven cylindrical gear 14.

The installation position of the shock absorber 10 and the air spring 9 is lower than the height of the axis of the hub 18, and correspondingly, the height of the installation interface position of the main frame and the air spring 9 is also reduced, so that the height of the bottom plate of the vehicle is reduced, passengers can get on the vehicle conveniently, and the vehicle can meet the requirement of a low-bottom-plate vehicle type. The number of the air springs 9 and the shock absorbers 10 is four.

The suspension integrated electric drive axle assembly integrates the functions of the traditional low-bottom plate mechanical axle, the drive motor 3, the two-gear automatic gearbox 8 and the independent suspension, and replaces the functions in structure and function. The vehicle has the advantages that the vehicle is driven by a pure electric motor in terms of power, the excellent characteristic of an independent suspension is inherited structurally, when wheels on one side are impacted by unevenness of a road surface, the wheels jump, the wheels on two sides are independent, the movement of the wheels on the other side is not influenced, the impact on the whole vehicle body is reduced, and the comfort is greatly improved; the structure of the auxiliary frame 2 can meet the arrangement of the driving motor 3 in multiple directions, the universality of a suspension is increased, meanwhile, the auxiliary frame 2 is used for mounting and fixing the driving motor 3 and the automatic gearbox 8 and providing support for a power system, four bolt holes at the tail end of the auxiliary frame 2 are interfaces connected with a main frame, the driving motor 3 and the automatic gearbox 8 are indirectly connected with the main frame through the auxiliary frame 2, the unsprung mass of a vehicle is reduced, the dynamic load of the ground on wheels is reduced, and the smoothness of the vehicle is improved; the universal joint input shaft 12 and the universal joint output shaft 11 are respectively connected with the output end of the automatic gearbox 8 and the wheel end driving cylindrical gear 13 through splines, so that power output by the driving motor 3 passes through the automatic gearbox 8 and is output to the wheel end 5 through the universal joint, the universal joint is energy-saving, the power transmission does not generate space interference when the tire jumps, and the left wheel and the right wheel jump are mutually independent and do not influence each other.