CN212353582U

CN212353582U - Electric automobile driving system

Info

Publication number: CN212353582U
Application number: CN202021615714.0U
Authority: CN
Inventors: 梁运胜
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-08-06
Filing date: 2020-08-06
Publication date: 2021-01-15
Anticipated expiration: 2030-08-06

Abstract

The utility model discloses an electric automobile driving system, which comprises a first driving mechanism, wherein the first driving mechanism comprises a first driving motor and a fixed gear ratio gearbox; the fixed gear ratio gearbox is connected with one axle of the automobile; and the second driving mechanism comprises a second driving motor and a driven gear assembly connected with another axle of the automobile. The application provides an electric automobile actuating system, moreover, the steam generator is simple in structure, adopt two motor timesharing drive modes, axle installation motor is with fixed gear ratio gearbox drive front axle in the electric automobile front, install a motor additional at electric automobile's rear axle, the rear axle motor need not fixed gear ratio gearbox, rear axle motor drive axle direct drive car rear axle, let electric automobile let the rear axle motor drive car go with the most economic rotational speed when going at a high speed, in order to reach the purpose of the high-speed power saving that traveles of electric automobile, improve electric automobile's high-speed acceleration ability and utmost point speed.

Description

Electric automobile driving system

Technical Field

The utility model relates to a drive arrangement technical field especially relates to an electric automobile actuating system.

Background

The electric vehicle (BEV) is a vehicle which takes a vehicle-mounted power supply as power and drives wheels by a motor, and meets various requirements of road traffic and safety regulations. Because the influence on the environment is smaller than that of the traditional automobile, the prospect is widely seen.

The electric automobile produced in the prior art is structured in such a way that a battery is mounted at the bottom of the automobile and supplies power to a motor through a controller, and the motor drives an axle in such a way that the motor drives the axle through a fixed gear ratio variable box. This configuration is simple and reliable, but because the motor drives the axle in a fixed gear ratio. The electric automobile can only increase current and increase the rotating speed when running at high speed, so that the motor runs at high rotating speed and high load when the current electric automobile runs at the high speed and the speed of more than 100 kilometers per hour, the power consumption is very high, and the endurance is obviously shortened.

SUMMERY OF THE UTILITY MODEL

The utility model provides an electric automobile actuating system.

The utility model provides a following scheme:

an electric vehicle drive system comprising:

a first drive mechanism including a first drive motor and a fixed gear ratio transmission; the fixed gear ratio gearbox is connected with one axle of the automobile;

the second driving mechanism comprises a second driving motor and a driven gear assembly connected with another axle of the automobile; and an output shaft of the second driving motor is connected with a driving gear assembly, and the driving gear assembly is meshed with the driven gear assembly.

Preferably: the driving gear assembly comprises a first driving gear, the driven gear assembly comprises a first driven gear, the first driving gear is in meshed connection with the first driven gear, and the diameter of the first driving gear is the same as that of the first driven gear.

Preferably: the driving gear assembly comprises a second driving gear and a third driving gear, the driven gear assembly comprises a second driven gear and a third driven gear, the second driving gear is meshed with the third driven gear, and the third driving gear is meshed with the second driven gear.

Preferably: the diameter of the second driving gear is the same as that of the second driven gear, and the diameter of the third driving gear is the same as that of the third driven gear.

Preferably: the diameter of the second driving gear is larger than that of the third driving gear.

Preferably: the vehicle speed monitoring device further comprises a vehicle speed monitoring assembly and a motor switching controller, wherein the vehicle speed monitoring assembly is electrically connected with the motor switching controller; the motor switching controller is electrically connected with the first driving motor and the second driving motor respectively; the motor switching controller is used for controlling the working states of the first driving motor and the second driving motor according to the acquired speed of the automobile and a preset control strategy.

According to the utility model provides a concrete embodiment, the utility model discloses a following technological effect:

through the utility model, an electric automobile driving system can be realized, and in one implementation mode, the system can comprise a first driving mechanism, wherein the first driving mechanism comprises a first driving motor and a fixed gear ratio gearbox; the fixed gear ratio gearbox is connected with one axle of the automobile; the second driving mechanism comprises a second driving motor and a driven gear assembly connected with another axle of the automobile; and an output shaft of the second driving motor is connected with a driving gear assembly, and the driving gear assembly is meshed with the driven gear assembly. The application provides an electric automobile actuating system, moreover, the steam generator is simple in structure, adopt two motor timesharing drive modes, axle installation motor is with fixed gear ratio gearbox drive front axle in the electric automobile front, install a motor additional at electric automobile's rear axle, the rear axle motor need not fixed gear ratio gearbox, rear axle motor drive axle direct drive car rear axle, let electric automobile let the rear axle motor drive car go with the most economic rotational speed when going at a high speed, in order to reach the purpose of the high-speed power saving that traveles of electric automobile, improve electric automobile's high-speed acceleration ability and utmost point speed.

Of course, it is not necessary for any particular product to achieve all of the above-described advantages at the same time.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an electric vehicle driving system according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a second driving mechanism according to an embodiment of the present invention.

In the figure: the device comprises a first driving mechanism 1, a second driving mechanism 2, a second driving motor 21, a driven gear assembly 22, a driving gear assembly 23, a vehicle speed monitoring assembly 3, a motor switching controller 4, an axle 5 and a power supply battery 6.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely 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, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art all belong to the protection scope of the present invention.

Examples

Referring to fig. 1 and 2, in order to provide an electric vehicle driving system according to an embodiment of the present invention, as shown in fig. 1 and 2, the system includes a first driving mechanism 1, where the first driving mechanism 1 includes a first driving motor and a fixed gear ratio transmission; the fixed gear ratio gearbox is connected with one axle of the automobile;

a second driving mechanism 2, wherein the second driving mechanism 2 comprises a second driving motor 21 and a driven gear assembly 22 connected with another axle of the automobile; the output shaft of the second driving motor 21 is connected with a driving gear assembly 23, and the driving gear assembly 23 is meshed with the driven gear assembly 22.

The pure electric vehicle replaces the engine with the motor, and an electric drive and kinetic energy recovery system and a power battery pack are added. The use mode of the equipment on the vehicle must be reasonably optimized by ensuring the normal riding comfort in the vehicle and keeping the enough placing space of the power system. This is why some pure electric vehicles design the power battery pack on the chassis, and some are disposed under the trunk. Also, because the conventional transmission is bulky, it is much larger than a fixed gear ratio transmission, even if it is a continuously variable transmission. Although torque output generated by the motor of the fixed gear ratio transmission is achieved in one go, the uninterrupted power output is beneficial to starting acceleration, but is not beneficial to the economy and comfort of the vehicle. Especially when the speed reaches about 100 kilometers per hour, the motor is required to generate ultrahigh rotating speed to meet the speed requirement. The increase of the rotating speed of the motor will cause the over-high energy consumption and influence the endurance mileage of the electric automobile. The application provides an electric automobile actuating system adopts two motor timesharing drive modes, can install a motor additional at electric automobile's rear axle at electric automobile front axle fixed gear ratio gearbox drive front axle for motor, rear axle motor need not fixed gear ratio gearbox, motor drive axle direct drive car rear axle. The power output requirement at low speed can be ensured, and the energy consumption economy at high speed can be ensured. Meanwhile, the added second driving mechanism does not occupy too much space of the electric automobile.

Specifically, the driving gear assembly comprises a first driving gear, the driven gear assembly comprises a first driven gear, the first driving gear is meshed with the first driven gear, and the diameter of the first driving gear is the same as that of the first driven gear. The driving gear assembly comprises a second driving gear and a third driving gear, the driven gear assembly comprises a second driven gear and a third driven gear, the second driving gear is meshed with the third driven gear, and the third driving gear is meshed with the second driven gear. The diameter of the second driving gear is the same as that of the second driven gear, and the diameter of the third driving gear is the same as that of the third driven gear. The diameter of the second driving gear is larger than that of the third driving gear. The automobile rear axle motor and the automobile rear axle are driven by double gears, two driving wheels and two driven wheels, wherein one driving wheel is large and one small, and one driven wheel is small and one large, so that the biting resultant force of the gears is increased to prevent slipping.

In order to further realize intelligent control, the intelligent control system further comprises a vehicle speed monitoring assembly 3 and a motor switching controller 4, wherein the vehicle speed monitoring assembly 3 is electrically connected with the motor switching controller 4; the motor switching controller 4 is electrically connected with the first driving motor and the second driving motor respectively; the vehicle speed monitoring assembly 3 is used for acquiring the vehicle speed of the vehicle, and the motor switching controller is used for controlling the working states of the first driving motor and the second driving motor according to the acquired vehicle speed of the vehicle and a preset control strategy. The control strategy comprises the steps of controlling the first driving motor to be started and the second driving motor to be stopped when the vehicle speed is not more than 100 kilometers per hour; and when the vehicle speed reaches 100 kilometers per hour, controlling the second driving motor to be started, and controlling the first driving motor to be closed after the second driving motor is started for 1 second. The control strategy further includes controlling the output power of the second drive motor to control the vehicle speed of the vehicle between 100 km/h and 120 km/h. It is conceivable that the first drive mechanism may alternatively be mounted on the front axle or the rear axle of the vehicle, as long as it is ensured that the first drive mechanism and the second drive mechanism drive the two axles separately. The following description takes an example that a first driving mechanism is arranged on a front shaft and a second driving mechanism is arranged on a rear shaft as an example, when the running speed of an automobile is below 100 kilometers per hour, a speed monitor transmits signals to a speed monitoring switch, the monitoring switch turns on a front shaft of the automobile driven by a front motor, when the speed of the automobile reaches 100 kilometers per hour, the speed monitor transmits signals to the speed monitoring switch to turn on a rear shaft motor to drive a rear shaft of the automobile driven by the rear shaft motor, the rear shaft motor turns on for 1 second and then turns off the front motor, when the speed of the automobile runs at 100 kilometers per hour, the rear shaft motor drives the rear shaft of the automobile through a gear ratio of 1:1, the speed monitoring switch sets a starting speed of the rear shaft motor according to the power of the rear shaft motor, and the starting speed of the rear shaft motor can set a speed value between 100 kilometers per hour and.

In order to reach the purpose of retrieving kinetic energy, first driving motor and second driving motor that this application provided all can link to each other with electric automobile's kinetic energy recovery system. The second drive motor may function as a generator when the first drive motor is started, and similarly, the first drive motor may function as a generator when the second drive motor is started.

In a word, the electric automobile actuating system that this application provided, simple structure is reasonable, adopt two motor timesharing drive modes, install motor fixed gear ratio gearbox drive front axle at electric automobile front axle, install a motor additional at electric automobile's rear axle, the rear axle motor need not fixed gear ratio gearbox, rear axle motor drive shaft direct drive car rear axle, let electric automobile let the rear axle motor drive the car with the most economic rotational speed when going at a high speed and go at a high speed, in order to reach the purpose of the high-speed power saving that goes of electric automobile, improve electric automobile's high-speed acceleration ability and utmost point speed.

It is noted that, herein, relational terms such as first and second, and the like may be 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. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.

Claims

1. An electric vehicle drive system, comprising:

2. The electric vehicle drive system of claim 1, wherein the drive gear assembly comprises a first drive gear and the driven gear assembly comprises a first driven gear, the first drive gear is in meshed connection with the first driven gear, and the diameter of the first drive gear is the same as the diameter of the first driven gear.

3. The electric vehicle drive system of claim 1, wherein the drive gear assembly comprises a second drive gear and a third drive gear, and the driven gear assembly comprises a second driven gear and a third driven gear, the second drive gear is in meshed connection with the third driven gear, and the third drive gear is in meshed connection with the second driven gear.

4. The electric vehicle drive system of claim 3, wherein the diameter of the second drive gear is the same as the diameter of the second driven gear, and the diameter of the third drive gear is the same as the diameter of the third driven gear.

5. The electric vehicle drive system of claim 4, wherein the diameter of the second drive gear is greater than the diameter of the third drive gear.

6. The electric vehicle drive system of claim 1, further comprising a vehicle speed monitoring assembly and a motor switching controller, the vehicle speed monitoring assembly being electrically connected to the motor switching controller; the motor switching controller is electrically connected with the first driving motor and the second driving motor respectively; the motor switching controller is used for controlling the working states of the first driving motor and the second driving motor according to the acquired speed of the automobile and a preset control strategy.