CN110203060A - A kind of electric car bi-motor Direct wheel drives system - Google Patents

Abstract

The present invention relates to a kind of electric car bi-motor Direct wheel drives systems, including reduction gearbox, the right wheel with the revolver of left half axle transmission and with right axle shaft transmission, the system further includes that the Left Drive component to realize left half axle and motor M2 transmission and the right transmission component to realize right axle shaft and motor M1 transmission are fixed and be equipped with along the motor M1 and motor M2 of longitudinal direction of car arrangement, the reduction box casing with the ipsilateral integral type of reduction box casing.Compared with prior art, the present invention, which has, saves space, improves compactedness and integrated level, and structure is simple, and manufacturing cost is low, has many advantages, such as double reduction, reduces the requirement to driving motor performance.

Description

A dual-motor wheel-side drive system for an electric vehicle

technical field

The invention relates to the field of drive and transmission of electric vehicles, in particular to a dual-motor wheel side drive system for electric vehicles.

Background technique

Compared with traditional fuel vehicles, pure electric vehicles have many advantages such as zero emission, high efficiency, quiet and smooth operation, and are an important trend in the future development of automobiles. According to the drive system configuration, pure electric vehicles are mainly divided into two categories: centralized drive and distributed drive. Compared with centralized drive electric vehicles, distributed drive electric vehicles have outstanding advantages such as short drive transmission chain, high transmission efficiency, and compact structure. In addition, because the wheel drive torque is independently controllable, the vehicle dynamics control performance is better. It can greatly improve the active safety performance of the vehicle. The configuration of the distributed drive system can be divided into two categories: the wheel drive system and the hub drive system. Due to factors such as high manufacturing cost, high technical difficulty, and large unsprung mass of in-wheel motors, it is currently difficult to apply them to medium and high-speed electric vehicles. The wheel drive system generally uses a high-speed motor equipped with a reducer, and finally transmits the power to the wheels. Compared with in-wheel motors, high-speed motors are small in size, light in weight, low in cost, high in power density, and high in efficiency, and the manufacturing cost and technical difficulty of the equipped reducer are also low, and the wheel drive system is easy for practical application. Therefore, the wheel drive system is currently the mainstream drive system configuration for distributed drive electric vehicles.

The high-speed motors of the wheel drive system are mainly arranged in three forms: on the body, on the suspension and the suspension acts as a dynamic shock absorber. Arranged in the suspension or as a dynamic shock absorber, the two arrangements can effectively suppress the negative effect of the unsprung mass and improve the ride comfort of the vehicle, but it needs to be integrated with the suspension system, which is technically difficult. At present, the most common solution is to arrange high-speed motors on the vehicle body.

Chinese patent 200810097693.5 "Dual Motor Anti-slip Differential Drive Axle for Electric Vehicles" proposes a wheel-side drive system scheme with dual motors face-to-face arrangement combined with an integrated reducer. In addition, an anti-slip differential device is installed inside the reducer to solve the problem of vehicle slippage . The face-to-face arrangement of dual motors takes up too much space in the lateral layout of the vehicle, and due to the rapid development of electronic control technology in recent years, the drive wheel differential and anti-skid can be realized by independent control of the dual motors without setting an anti-skid differential device.

Contents of the invention

The object of the present invention is to provide a dual-motor wheel drive system for an electric vehicle in order to overcome the defects in the above-mentioned prior art.

The purpose of the present invention can be achieved through the following technical solutions:

A dual-motor wheel-side drive system for an electric vehicle, including a reduction gearbox, a left wheel driven by the left half shaft, and a right wheel driven by the right half shaft. The motor M1 and the motor M2 are arranged, and the gearbox housing is provided with a left transmission assembly for realizing the transmission of the left half shaft and the motor M2 and a right transmission assembly for realizing the transmission of the right half shaft and the motor M1.

The left transmission assembly includes the motor M1 primary reduction driving gear, the motor M1 primary reduction driven gear, the motor M1 secondary reduction driving gear and the motor M1 secondary reduction driven gear connected in sequence, and the motor M1 The primary reduction drive gear is fixedly connected to the output shaft of the motor M1, and the output shaft of the secondary reduction driven gear of the motor M1 is connected to the right half shaft through a universal joint at the upper end of the right half shaft.

The right transmission assembly includes the motor M2 primary reduction driving gear, the motor M2 primary reduction driven gear, the motor M2 secondary reduction driving gear and the motor M2 secondary reduction driven gear that are sequentially connected, and the motor M2 The primary reduction drive gear is fixedly connected to the output shaft of the motor M2, and the output shaft of the secondary reduction driven gear of the motor M2 is connected to the left half shaft through a universal joint at the upper end of the left half shaft.

The other end of the right half shaft is connected with the right wheel through the universal joint at the lower end of the right half shaft.

The other end of the left half shaft is connected with the left wheel through the universal joint at the lower end of the left half shaft.

The motor M1 secondary reduction driving gear and the motor M1 primary reduction driven gear are arranged on the same shaft, and are connected with the reducer housing by a rotating pair.

The secondary reduction driving gear of the motor M2 and the primary reduction driven gear of the motor M2 are arranged on the same shaft, and are connected with the reducer housing 4 by a rotating pair.

The speed reducer, the motor M1 and the motor M2 are all arranged on the vehicle body.

The system adopts the joint drive mode of dual motors, specifically:

The power of the motor M1 is output to the right half shaft through the two-stage deceleration of the motor M1 first-stage deceleration driving gear, the motor M1 first-stage deceleration driven gear, the motor M1 two-stage deceleration driving gear and the motor M1 two-stage deceleration driven gear, and then through The universal joint at the lower end of the right half shaft is transmitted to the right wheel;

The power of motor M2 is output to the left half shaft through the two-stage deceleration of the motor M2 primary reduction driving gear, the motor M2 primary reduction driven gear, the motor M2 secondary deceleration driving gear and the motor M2 secondary deceleration driven gear, and then through the left half shaft. The universal joint at the lower end of the half shaft is passed to the left wheel.

Compared with the prior art, the present invention has the following advantages:

1. The configuration scheme of the wheel drive system in the present invention adopts dual motors and reducers arranged on the vehicle body, all of which are sprung masses, so that the vehicle has better ride comfort.

2. In the present invention, the integrated design of the double motor and the reducer improves the compactness of the whole system. The motor and the reducer are arranged along the longitudinal direction of the vehicle, which saves the layout space around the wheel and avoids interference with the suspension system. It is also more convenient to refit the traditional oil truck, just arrange the system directly at the original generator position, which has strong applicability.

3. The integrated dual-motor wheel drive system of the present invention can match and design motors and reducers according to different requirements, so as to meet the requirements of different vehicle models, and has strong versatility.

4. The distributed drive vehicle equipped with the dual-motor wheel drive system can make the vehicle have better energy consumption and dynamic control performance through the torque distribution control of the motors.

Description of drawings

Fig. 1 is a schematic structural diagram of the dual-motor wheel drive system of an electric vehicle according to the present invention.

Instructions for marks in the figure:

1. Motor M1, 2. Motor M1 primary reduction driving gear, 3. Motor M1 primary reduction driven gear, 4. Reducer housing, 5. Motor M1 secondary reduction driving gear, 6. Motor M1 secondary reduction gear Driven gear, 7, motor M2 secondary reduction driven gear, 8, left half shaft, 9, left wheel, 10, motor M2 secondary reduction driving gear, 11, motor M2 primary reduction driven gear, 12, motor M2 , 13, right wheel, 14, right half shaft, 15, motor M2 first-stage reduction drive gear, A, left half shaft upper end universal joint, B, left half shaft lower end universal joint, C, right half shaft lower end universal joint Section, D, the universal joint at the upper end of the right half shaft.

Detailed ways

The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

Example

As shown in Figure 1, the present invention provides a dual-motor wheel drive system for an electric vehicle. The dual-motor wheel drive system for an electric vehicle is mainly composed of a motor M1, a first-stage deceleration driving gear 2 of the motor M1, and a first-stage deceleration driven gear of the motor M1. Gear 3, reducer housing 4, motor M1 secondary reduction driving gear 5, motor M1 secondary reduction driven gear 6, motor M2 secondary reduction driven gear 7, left half shaft 8, left wheel 9, motor M2 secondary Reduction driving gear 10, motor M2 primary reduction driven gear 11, motor M2, right wheel 13, right half shaft 14, motor M2 primary reduction driving gear 15, left half shaft upper end universal joint A, left half shaft lower end universal joint It consists of joint B, universal joint C at the lower end of the right half shaft, and universal joint D at the upper end of the right half shaft.

The motor M1 and the motor M2 are fixed to the reducer housing 4 through bolts, the first-stage reduction driving gear 2 of the motor M1 is fixedly connected to the output shaft of the motor M1, the first-stage reduction driven gear 3 of the motor M1 is connected to the first-stage reduction driving gear of the motor M1 2 meshing transmission, motor M1 two-stage deceleration driving gear 5 and motor M1 one-stage deceleration driven gear 3 are arranged on the same shaft, and is connected with the reducer housing 4 by a rotating pair, motor M1 two-stage deceleration driven gear 6 Mesh transmission with motor M1 two-stage deceleration driving gear 5, the output shaft of the right half shaft 14 and motor M1 two-stage deceleration driven gear 6 is connected through the universal joint D at the upper end of the right half shaft, and the right wheel and 13 right half shaft 14 pass through the right Universal joint C connection at the lower end of the half shaft;

The first-stage reduction driving gear 11 of the motor M2 is fixedly connected to the output shaft of the motor M2, the first-stage reduction driven gear 11 of the motor M2 meshes with the first-stage reduction driving gear 15 of the motor M2, and the second-stage reduction driving gear 10 of the motor M2 is connected to the motor M2. The stage reduction driven gear 11 is arranged on the same shaft, and is connected with the reducer housing 4 as a rotating pair. The motor M2 secondary reduction driven gear 7 is meshed with the motor M2 secondary reduction driving gear 10. The left half shaft 8 The output shaft of the secondary reduction driven gear 7 of the motor M2 is connected through the universal joint A at the upper end of the left half shaft, and the left wheel 9 is connected with the left half shaft 8 through the universal joint B at the lower end of the left half shaft.

The working principle of the electric vehicle double motor wheel edge drive system of the present invention is as follows:

The electric vehicle dual-motor wheel drive system adopts a dual-motor joint drive scheme. The power of the motor M1 passes through the motor M1 primary reduction driving gear 2, the motor M1 primary reduction driven gear 3, the motor M1 secondary reduction driving gear 5 and the motor. The M1 two-stage deceleration driven gear 6 outputs the two-stage deceleration to the right half shaft 14, and then transmits it to the right wheel 13 through the universal joint C at the lower end of the right half shaft;

Similar to this, the power of the motor M2 is output through the two-stage deceleration of the motor M2 primary reduction driving gear 15, the motor M2 primary reduction driven gear 11, the motor M2 secondary reduction driving gear 10 and the motor M2 secondary reduction driven gear 7. Give the left half shaft 8, then pass to the left wheel 9 by the universal joint B at the lower end of the left half shaft.

In the present invention, the integrated design of the double motor and the reducer improves the compactness of the whole system, arranges the motor and the reducer along the longitudinal direction of the vehicle, saves the layout space around the wheel, and avoids interference with the suspension system. The refitting of the car is also more convenient, and the system can be directly arranged at the original generator position, which has strong applicability.

Claims (9)

1. a kind of electric car bi-motor Direct wheel drives system, including reduction gearbox, with the revolver (9) of left half axle (8) transmission and With the right wheel (13) of right axle shaft (14) transmission, which is characterized in that the system further includes solid with reduction box casing (4) ipsilateral integral type Motor M1 (1) and motor M2 (12) fixed and along longitudinal direction of car arrangement, the reduction box casing (4) is interior to be equipped with to realize a left side The Left Drive component and the right side to realize right axle shaft (14) and motor M1 (1) transmission of semiaxis (8) and motor M2 (12) transmission Transmission component.

2. a kind of electric car bi-motor Direct wheel drives system according to claim 1, which is characterized in that the left biography Dynamic component include the motor M1 primary speed-down driving gear (2) being successively sequentially connected, motor M1 primary speed-down driven gear (3), Motor M1 double reduction driving gear (5) and motor M1 double reduction driven gear (6), the motor M1 primary speed-down is actively Gear (2) and the output shaft of motor M1 (1) are affixed, and the output shaft of the motor M1 double reduction driven gear (6) passes through the right side Semiaxis upper end universal joint (D) and right axle shaft (14) one end are sequentially connected.

3. a kind of electric car bi-motor Direct wheel drives system according to claim 1, which is characterized in that the right biography Dynamic component includes the motor M2 primary speed-down driving gear (15) being successively sequentially connected, motor M2 primary speed-down driven gear (11), motor M2 double reduction driving gear (10) and motor M2 double reduction driven gear (7), the motor M2 level-one subtract Fast driving gear (15) and the output shaft of motor M2 (12) are affixed, the output of the motor M2 double reduction driven gear (7) Axis is sequentially connected by left half axle upper end universal joint (A) and left half axle (8) one end.

4. a kind of electric car bi-motor Direct wheel drives system according to claim 2, which is characterized in that described right half Axis (14) other end is connect by right axle shaft lower end universal joint (C) with right wheel (13).

5. a kind of electric car bi-motor Direct wheel drives system according to claim 3, which is characterized in that described left half Axis (8) other end is connect by left half axle lower end universal joint (B) with revolver (9).

6. a kind of electric car bi-motor Direct wheel drives system according to claim 2, which is characterized in that the motor M1 double reduction driving gear (5) and motor M1 primary speed-down driven gear (3) are arranged on the same axis, and and reducer shell (4) it is connected between for revolute pair.

7. a kind of electric car bi-motor Direct wheel drives system according to claim 3, which is characterized in that the motor M2 double reduction driving gear (10) and motor M2 primary speed-down driven gear (11) are arranged on the same axis, and and reducing gearbox It is connected between body 4 for revolute pair.

8. a kind of electric car bi-motor distribution drive system according to claim 1, which is characterized in that described subtracts Fast device, motor M1 (1) and motor M2 (12) are arranged on vehicle body.

9. a kind of electric car bi-motor Direct wheel drives system according to claim 1, which is characterized in that the system uses The common driving method of bi-motor, specifically:

The power of motor M1 (1) passes sequentially through motor M1 primary speed-down driving gear (2), motor M1 primary speed-down driven gear (3), motor M1 double reduction driving gear (5) and motor M1 double reduction driven gear (6) double reduction are output to right axle shaft (14), right wheel (13) then by right axle shaft lower end universal joint (C) are passed to；

The power of motor M2 (12) passes through motor M2 primary speed-down driving gear (15), motor M2 primary speed-down driven gear (11), motor M2 double reduction driving gear (10) and motor M2 double reduction driven gear (7) double reduction are output to left half Axis (8), then revolver (9) are passed to by left half axle lower end universal joint (B).