CN210941314U - Integrated electric drive electric control device and electric automobile - Google Patents

Abstract

The utility model relates to an integrated electric drive electric control device and an electric vehicle, comprising a reducer assembly, a motor assembly and a motor controller assembly; the reducer assembly comprises a first casing of the reducer, a second casing of the reducer and the input shaft of the reducer; the motor assembly includes a motor casing, a motor drive unit assembly and a motor shaft; the motor casing is fixedly connected with the second casing of the reducer, the motor shaft and the reducer The input shaft is fixedly connected; the motor controller assembly includes a control unit assembly and a motor controller housing, the control supply unit assembly is electrically connected with the motor drive unit assembly, and the motor controller housing is fixedly arranged on the on the second housing of the reducer and/or the motor housing. By rationally arranging the positions of the components of the motor controller, the technical problems of large space occupied and complex structure of the motor controller in the prior art are solved, and the technical effect of compact structure and small space occupation is achieved.

Description

An integrated electric drive electric control device and electric vehicle

technical field

The utility model relates to the field of automobiles, in particular to an integrated electric drive electric control device on an electric automobile and an electric automobile.

Background technique

At present, among the technical routes of various new energy vehicles, electric vehicles represented by hybrid electric vehicles, pure electric vehicles and fuel cell vehicles are generally considered to be the main direction for the transformation and development of future automotive energy power systems, and have become the world's automotive power and Major automakers development priorities. China is already a big country in the world's auto industry, and China's future auto industry must explore new ideas. The electric vehicle industry is expected to open up new growth points for China's auto industry.

At present, the electric drive electronic control system assembly for electric vehicles is composed of a drive motor + a motor controller + a reducer, which are independent components. During the final assembly, the motor controller is connected with the drive motor through three-phase high-voltage cables, and the installation positions of the two are independent of each other; the drive motor and the reducer are connected by flange bolts and fixedly installed together; the input of the drive motor shaft and the reducer is The shaft transmits torque through a splined fit.

The existing electric drive electric control system assembly for electric vehicles has the following defects or deficiencies:

1) The motor controller is arranged separately and installed on the sub-frame, which occupies a large space as a whole, and the three-phase high-voltage cables and cooling water pipes are relatively long, resulting in high cost and low reliability;

2) The drive motor and the reducer are connected by bolts on the flange surface. There are many parts and materials, which leads to an increase in weight; there are many processing and assembly procedures, which leads to a larger cumulative error after assembly and an increase in cost;

3) The drive motor shaft and the input shaft of the reducer transmit torque through spline matching, and there will be a certain gap on the tooth side when the inner and outer splines are matched. In the process of starting, accelerating and braking of the car, the existence of this gap will cause the two coupling shafts to collide with each other, resulting in high temperature, wear, abnormal noise and fatigue failure.

Due to the above problems, the performance of electric vehicles will be affected and the long-term development of electric vehicles will be hindered. Therefore, it is urgent to provide a new electric drive electric control device to solve the above problems and meet the higher demands of customers.

SUMMARY OF THE INVENTION

In order to solve the above-mentioned technical problems, the utility model provides an integrated electric drive electric control device with compact structure, small occupied space and convenient arrangement. The improvement solves the technical problems in the prior art that the motor controller occupies a large space, the connection relationship between the motor, the reducer and the motor is complicated, the assembly parts are many, and the assembly process is complicated.

The technical effect of the present utility model is achieved through the following:

An integrated electric drive electric control device includes a reducer assembly, a motor assembly and a motor controller assembly; the reducer assembly includes a first casing of the reducer, a second casing of the reducer and an input shaft of the reducer; the The motor assembly includes a motor casing, a motor drive unit assembly and a motor shaft; the motor casing is fixedly connected to the second casing of the reducer, and the motor shaft is fixedly connected to the reducer input shaft;

The motor controller assembly includes a control unit assembly and a motor controller casing, the control unit assembly is electrically connected to the motor drive unit assembly, and the motor controller casing is fixedly arranged on the second speed reducer. on the housing and/or the motor housing.

Further, the second housing of the reducer and the motor housing are integrally formed.

Further, the motor assembly further includes a motor water channel, the motor controller assembly further includes a motor controller water channel, and the motor water channel is directly connected to the motor controller water channel.

Further, a sealing device is provided at the joint between the motor controller housing and the motor housing.

Further, the control unit assembly and the motor drive unit assembly are connected through copper bars.

Further, the motor shaft and the input shaft of the reducer are integrally formed.

Further, the end of the input shaft of the reducer away from the motor shaft is provided with a first bearing, and the end of the motor shaft away from the input shaft of the reducer is provided with a second bearing.

Further, the first bearing is a cylindrical roller bearing, and the second bearing is a deep groove ball bearing.

Further, the first casing of the reducer and the second casing of the reducer are fixed by bolts, and the connecting surface of the first casing of the reducer and the second casing of the reducer is coated with sealant.

In addition, the present utility model also describes an electric vehicle, which is characterized in that it includes a subframe and an integrated electric drive and electric control device as described above in the summary of the invention, and the integrated electric drive control device is installed through a suspension device on the subframe.

As mentioned above, the utility model has the following beneficial effects:

1. Compact structure, small footprint, convenient layout. The motor controller is fixed in front of the drive motor and the reducer, which can effectively use the space, reduce the Z-direction height, and facilitate the layout of the whole vehicle; the motor casing and the right casing of the reducer are integrally cast and formed, and the motor shaft and the reducer input shaft The integrated structure can effectively reduce the axial dimension of the assembly;

2. Reduce the number of parts, light weight and low cost. The motor controller is fixed on the rear end cover of the motor and the reducer casing, which can share the water channel and connect with the motor through short copper bars, eliminating the need for water pipes and high-voltage cables; the motor casing and the right casing of the reducer are integrally cast. It can reduce the processing and assembly process and avoid accumulated errors in the assembly process; the motor shaft and the input shaft of the reducer are integrated, and the cantilever beam structure is adopted, which can reduce the number of supporting bearings.

3. Reduce impact noise and improve reliability. Compared with the structure in which the split shaft is connected by splines and supported by four bearings, the integrated structure of the motor shaft and the input shaft of the reducer can eliminate the gap in the spline fit and avoid the impact of the car during starting, acceleration and braking. Noise; the cantilever beam structure of the one-piece shaft can avoid the over-restraint of the four-bearing support and the non-concentricity of the split shaft, and improve the reliability of the power transmission of the system.

Description of drawings

In order to illustrate the technical solutions of the present invention more clearly, the following will briefly introduce the accompanying drawings required in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

Fig. 1 is the structural representation after the utility model is assembled;

Fig. 2 is the structural representation after splitting of the utility model;

Figure 3 is a schematic diagram of the internal parts of the utility model.

Among them, the reference signs in the figure correspond to:

1. Reducer assembly; 2. Motor assembly; 3. Motor controller assembly; 4. Oil seal; 11. First casing of reducer; 12. Second casing of reducer; 13. Reducer input shaft; 14. No. 1 bearing; 21, motor housing; 22, motor drive unit assembly; 23, motor shaft; 24, motor water channel; 25, motor rear end cover; 26, second bearing; 31, motor controller housing; 32, Motor controller waterways.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Example 1:

As shown in Figures 1-3, an integrated electric drive electronic control device includes a reducer assembly 1, a motor assembly 2 and a motor controller assembly 3; the reducer assembly 1 includes a first reducer housing 11, a reducer the second casing 12 of the reducer and the input shaft 13 of the reducer; the motor assembly includes a motor casing 21, a motor drive unit assembly 22 and a motor shaft 23; the motor casing 21 and the second casing of the reducer 12 is fixedly connected, the motor shaft 23 is fixedly connected with the reducer input shaft 13;

The motor controller assembly 3 includes a control unit assembly (not shown in the figure) and a motor controller housing 31, the motor controller housing 31 is electrically connected to the motor drive unit assembly 22, and the motor controller housing The body 31 is fixedly arranged on the second housing 12 of the reducer and the motor housing 21 at the same time.

Further, the second reducer housing 12 and the motor housing 21 are integrally formed, so the motor control assembly housing 31 is connected to the second reducer housing 12 and the motor housing 21 to form on the one-piece housing.

Further, the motor assembly 2 further includes a motor water channel 24 , the motor controller assembly 3 further includes a motor controller water channel 32 , and the motor water channel 24 is directly connected to the motor controller water channel 32 .

Further, a sealing device is provided at the joint between the motor controller housing 31 and the motor housing 21 .

Further, the control unit assembly and the motor drive unit assembly 22 are connected through copper bars. The motor drive unit assembly 22 is specifically a motor rotor.

Further, the motor shaft 23 and the reducer input shaft 13 are integrally formed, referring to FIG. 3 , an oil seal 4 is provided between the motor assembly 2 and the reducer assembly 1 , and the integrally formed housing is divided into the left side by the oil seal 4 . The second housing 12 of the reducer and the motor housing 21 on the right side. The integrally formed shaft is divided into the reducer input shaft 13 on the left and the motor shaft 23 on the right by the oil seal 4 . A first bearing 14 is provided at one end of the reducer input shaft 13 away from the motor shaft 23 , and a second bearing 26 is provided at one end of the motor shaft 23 away from the reducer input shaft 13 .

Further, the first bearing 14 is a cylindrical roller bearing, and the second bearing 26 is a deep groove ball bearing.

Further, the first casing 11 of the reducer and the second casing 12 of the reducer are fixed by bolts, and the connecting surface of the first casing 11 of the reducer and the second casing 12 of the reducer is coated with a seal. glue.

In addition, the motor assembly 2 further includes a motor rear end cover 25 , which is detachably fixed on the motor housing 21 to facilitate the installation of the internal parts of the motor assembly 2 .

The working principle of this embodiment is as follows: the motor controller converts the direct current provided by the power battery into three-phase alternating current, and supplies power to the driving motor through the three-phase copper bar connection. After the motor is powered on, the integrated shaft starts to rotate, providing controllable speed and torque. The power is transmitted through the meshing of two pairs of gears in the reducer, which plays the role of deceleration and torque increase. The amplified torque is transmitted to the differential, which transmits the power to the half shafts on both sides through the spline connection, while allowing the half shafts on both sides to rotate at different speeds to meet the differential needs of the wheels on both sides when the car turns .

Through the above specific embodiments, the following technical effects are achieved:

1) The motor controller is located in front of the motor and the reducer, and is fixed on the rear end cover of the motor and the reducer housing. The controller is directly connected to the motor water channel, and the interior is connected to the motor through short copper bars; The technology is more compact and takes up less space;

2) The motor casing and the right casing of the reducer are integrally cast, which increases the structural strength and reduces the number of assembly parts and assembly steps;

3) The front bearing of the integrated shaft adopts a cylindrical roller bearing with stronger bearing capacity and a smaller radial size to bear the main radial load, and the outer ring of the bearing is fixed on both sides; the rear bearing of the integrated shaft adopts a deep groove ball bearing, which can bear a small part of Radial force and all axial forces are fixed on both sides of the inner and outer rings to prevent axial movement.

Example 2:

Compared with Embodiment 1, the difference in this embodiment is that the motor rear end cover is connected to the motor housing by welding or integral molding. Such an arrangement can further strengthen the structure and reduce assembly steps. Since the rear end cover of the motor cannot be opened, the components inside the motor assembly can be loaded through the opening of the second housing of the reducer.

Example 3:

Compared with the embodiment, this embodiment is different in that the first bearing is selected as a cylindrical roller bearing, and the second bearing is selected as a cylindrical roller bearing. Choosing the same cylindrical roller bearing reduces the error rate of assembly.

In addition, the present invention also includes an electric vehicle, which includes a subframe and the integrated electric drive electronic control device described in the above embodiments, but is not limited to these embodiments, but includes the invention of the present invention All possible example situations in the content. The integrated electric drive control device is mounted on the subframe through a suspension device.

Although the present invention has been described through the preferred embodiments, the present invention is not limited to the embodiments described herein, and various changes and changes can be made without departing from the scope of the present invention.

In this document, the related terms such as front, rear, upper and lower are defined by the positions of the components in the drawings and the positions between the components, which are only for the clarity and convenience of expressing the technical solution. It should be understood that the use of the locative words should not limit the scope of protection claimed in this application.

The above-described embodiments and features of the embodiments herein can be combined with each other without conflict.

What is disclosed above is only a preferred embodiment of the present invention, of course, it cannot limit the scope of the rights of the present invention. Therefore, the equivalent changes made according to the claims of the present invention are still covered by the present invention. scope.

Claims (10)

1. An integrated electric drive electric control device is characterized by comprising a speed reducer assembly, a motor assembly and a motor controller assembly; the speed reducer assembly comprises a speed reducer first shell, a speed reducer second shell and a speed reducer input shaft; the motor assembly comprises a motor shell, a motor driving unit assembly and a motor shaft; the motor shell is fixedly connected with the second shell of the speed reducer, and the motor shaft is fixedly connected with the input shaft of the speed reducer;

the motor controller subassembly is including supplying control unit subassembly and motor controller casing, supply the control unit subassembly with motor drive unit subassembly electricity is connected, motor controller casing fixed set up in reduction gear second casing and/or on the motor casing.

2. An integrated electric drive control device according to claim 1 wherein said reducer second housing and said motor housing are integrally formed.

3. The integrated electric drive and control device of claim 1 wherein the motor assembly further comprises a motor water channel, the motor controller assembly further comprising a motor controller water channel, the motor water channel and the motor controller water channel being directly connected.

4. An integrated electric drive control device according to claim 3 wherein the junction of said motor controller housing and said motor housing is provided with sealing means.

5. The integrated electric drive control device according to claim 1 wherein the control unit assembly is coupled to the motor drive unit assembly by copper bars.

6. An integrated electrically driven control as claimed in claim 1 wherein said motor shaft and said reducer input shaft are integrally formed.

7. An integrated electric drive control device according to claim 6 wherein the reducer input shaft is provided with a first bearing at an end remote from the motor shaft and a second bearing at an end of the motor shaft remote from the reducer input shaft.

8. The integrated electric drive control device of claim 7 wherein the first bearing is a cylindrical roller bearing and the second bearing is a deep groove ball bearing.

9. The integrated electric-driven control device according to claim 1, wherein the first reducer casing and the second reducer casing are fixed by bolts, and a sealing adhesive is applied to the connection surface of the first reducer casing and the second reducer casing.

10. An electric vehicle comprising a subframe and an integrated electric drive control device according to any one of claims 1 to 8, said integrated electric drive control device being mounted to said subframe by suspension means.

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