CN110217049A - A kind of electric car distribution driving axis - Google Patents

Abstract

The present invention relates to a kind of electric car distribution driving axis, including retarder, right wheel with the revolver of left half axle transmission and with right axle shaft transmission, the system further includes fixing with the ipsilateral integral type of reducer shell and along the motor M1 and motor M2 of longitudinal direction of car arrangement, 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 equipped in the reducing gearbox body, compared with prior art, the present invention has distributed driving, it operates more stable, saving is longitudinally arranged space, the advantages that more preferably energy consumption is with dynamics Controlling performance.

Description

Distributed drive axle assembly for an electric vehicle

technical field

The invention relates to the field of drive transmission of electric vehicles, in particular to a distributed drive axle assembly of electric vehicles.

Background technique

Under the background of vigorously advocating environmental protection, electric vehicles have become a hotspot in the research of the automobile industry due to their low energy consumption and low emissions. The distributed drive system has become an important research direction of new energy vehicles due to its advantages of simple structure and high transmission efficiency. According to the location of the motor, pure electric vehicles can be divided into two categories: centralized motor drive and distributed drive. Distributed drive is divided into two types: wheel hub direct drive and high-speed motor accelerator drive. Distributed drive usually uses motors installed on the drive wheels to transmit power to the wheels directly or via a reduction gear to drive the car. Distributed drive electric vehicles have the advantages of short drive transmission chain, high transmission efficiency, and compact structure, and the drive motor can independently and quickly control the driving force and braking force, improve vehicle driving dynamics, and easily realize ABS, TCS, and ESP, etc. Function. In addition, motor braking can realize braking energy feedback and save energy. At present, the distributed drive scheme of wheel hub direct drive is difficult to be widely used due to the difficulty in the development of hub motor technology, large unsprung mass, and high manufacturing cost. The distributed drive scheme of high-speed motor combined with reducer is currently a relatively mature technical solution. 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. 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. The distributed drive scheme of high-speed motor combined with reducer is easy for practical application .

Contents of the invention

The object of the present invention is to provide a distributed drive axle assembly for an electric vehicle in order to overcome the above-mentioned defects in the prior art.

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

A distributed drive axle assembly for an electric vehicle, including a speed reducer, 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 reducer 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 first-stage reduction driving gear of the motor M2, the first-stage reduction driven gear of the motor M2 and the second-stage reduction planetary gear set of the motor M2 connected in sequence, and the first-stage reduction driving gear of the motor M2 and the motor M2 The output shaft of the motor M2 is fixedly connected, and the second-stage reduction planetary gear set 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 left half shaft is connected with the left wheel through the universal joint at the lower end of the left half shaft.

The right transmission assembly includes the first-stage reduction driving gear of the motor M1, the first-stage reduction driven gear of the motor M1, and the second-stage reduction planetary gear set of the motor M1, which are sequentially connected. The first-stage reduction driving gear of the motor M1 and the motor M1 The output shaft of the motor M1 is fixedly connected, and the second-stage reduction planetary gear set 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 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 speed reducer, the motor M1 and the motor M2 are all arranged on the vehicle body.

The cover assembly is jointly driven by dual motors, specifically:

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

The power of the motor M2 is output to the left half shaft through the motor M2 primary reduction driving gear, the motor M2 primary reduction driven gear, and the motor M2 secondary reduction planetary gear set. revolver.

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

1. The configuration scheme of the distributed drive system of the present invention adopts dual motors and reducers arranged on the vehicle body, all of which are sprung masses, and can be arranged according to the needs of users, so that the vehicle has better ride comfort.

2. In the speed reducer of the present invention, the design of the planetary gear set is adopted for the two-stage reduction, which improves the transmission efficiency of the transmission system, makes the operation more stable and smooth, and has low noise in application.

3. The present invention integrates the dual motors and the reducer into an integrated design, which improves the compactness of the whole system, saves vertical arrangement space, has a simple structure and low manufacturing cost.

4. The electric vehicle equipped with the distributed drive axle assembly can make the vehicle have better energy consumption and dynamic control performance through the torque distribution control of the motor. When cornering, the vehicle tends to lose stability because the lateral force of the tires reaches the adhesion limit. If a distributed drive system is used, the drive motors of the left and right wheels can be controlled to adjust the driving and braking forces of the left and right wheels to generate additional yaw moments, improving The yaw movement of the vehicle improves the handling stability of the vehicle.

5. The integrated distributed drive axle assembly of the present invention can match and design the motor and reducer according to different requirements, so as to meet the requirements of different vehicle models, and has strong versatility.

Description of drawings

Figure 1 is a schematic diagram of the structure of a distributed drive axle assembly for an electric vehicle.

Instructions for marks in the figure:

1. Motor M1, 2. Motor M1 primary reduction driving gear, 3. Reducer housing, 4. Motor M2 primary reduction driven gear, 5. Motor M2 secondary reduction planetary gear set, 6. Left half shaft, 7, left wheel, 8, motor M2 primary reduction driving gear, 9, motor M1 primary reduction driven gear, 10, motor M2, 11, right wheel, 12, right half shaft, 13, motor M1 secondary reduction planetary gear Group, A, universal joint at the upper end of the left half shaft, B, universal joint at the lower end of the left half shaft, C, universal joint at the lower end of the right half shaft, D, 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 distributed drive axle assembly for electric vehicles. The distributed drive axle assembly for electric vehicles is mainly composed of a motor M1, a primary reduction drive gear 2 of the motor M1, a reducer housing 3, a motor M2 primary reduction driven gear 4, motor M2 secondary reduction planetary gear set 5, left half shaft 6, left wheel 7, motor M2 primary reduction driving gear 8, motor M1 primary reduction driven gear 9, motor M2, right Wheel 11, right half shaft 12, motor M1 two-stage deceleration planetary gear set 13, upper end universal joint A of left half shaft, lower end universal joint B of left half shaft, lower end universal joint C of right half shaft, upper universal joint of right half shaft It is composed of joint D and other components.

The motor M1 and the motor M2 are fixed to the reducer housing 3 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 9 of the motor M1 is connected to the first-stage reduction driving gear of the motor M1 2 meshing transmission, the motor M1 secondary reduction planetary gear set 13 and the motor M1 primary reduction driven gear 9 are arranged on the same shaft, and are connected with the reducer housing 3 by a rotating pair, and the right half shaft 12 is connected to the motor M1 two The output shaft of the stage reduction planetary gear set 13 is connected through the universal joint D at the upper end of the right half shaft, and the right wheel 11 and the right half shaft 12 are connected through the universal joint C at the lower end of the right half shaft;

Motor M2 primary reduction driving gear 8 is fixedly connected to the output shaft of motor M2, motor M2 primary reduction driven gear 4 meshes with motor M2 primary reduction driving gear 8 for meshing transmission, motor M2 secondary reduction planetary gear set 5 and motor M1 The first-stage reduction driven gear 4 is arranged on the same shaft, and is connected with the reducer housing 3 by a rotating pair. The output shaft of the left half shaft 6 and the motor M2 second-stage reduction planetary gear set 5 passes through the upper end of the left half shaft. Joint A is connected, and the left wheel 7 is connected with the left half shaft 6 through the universal joint B at the lower end of the left half shaft.

The working principle of the electric vehicle distributed drive axle assembly is as follows:

The electric vehicle distributed drive axle assembly 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 9, and the motor M1 secondary reduction planetary gear set 13 Two-stage deceleration is output to the right half shaft 12, and then transmitted to the right wheel 11 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 to the left half shaft 6 through the two-stage deceleration of the motor M2 primary reduction driving gear 8, the motor M2 primary reduction driven gear 4, and the motor M2 secondary reduction planetary gear set 5, and then through the left half shaft. The universal joint B at the lower end of the half shaft is passed to the left wheel 7.

Claims (7)

1. A distributed drive axle assembly for an electric vehicle, comprising a speed reducer, a left wheel (7) with a left half shaft (6) transmission and a right wheel (11) with a right half shaft (12) transmission, characterized in that, The system also includes a motor M1 (1) and a motor M2 (10) integrally fixed on the same side of the reducer housing (4) and arranged along the longitudinal direction of the vehicle. A left transmission assembly driven by the left half shaft (6) and the motor M2 (10) and a right transmission assembly used to realize the transmission of the right half shaft (12) and the motor M1 (1). 2. A distributed drive axle assembly for an electric vehicle according to claim 1, characterized in that, the left transmission assembly includes a first-stage deceleration driving gear (8) of the motor M2 and a first-stage reduction drive gear (8) of the motor M2, which are sequentially connected by transmission. The reduction driven gear (4) and the motor M2 two-stage reduction planetary gear set (5), the motor M2 primary reduction driving gear (8) is fixedly connected to the output shaft of the motor M2 (10), and the motor M2 The two-stage deceleration planetary gear set (5) is connected to the left half shaft (6) through a universal joint (A) at the upper end of the left half shaft. 3. A distributed drive axle assembly for electric vehicles according to claim 2, characterized in that, the other end of the left half shaft (6) is connected to the left wheel (7) through the universal joint (B) at the lower end of the left half shaft ) transmission connection. 4. A distributed drive axle assembly for an electric vehicle according to claim 1, characterized in that, the right transmission assembly includes a first-stage deceleration driving gear (2) of the motor M1 and a first-stage motor M1 that are sequentially connected in transmission. The reduction driven gear (9) and the motor M1 secondary reduction planetary gear set (13), the motor M1 primary reduction driving gear (2) is fixedly connected to the output shaft of the motor M1 (1), and the motor M1 The two-stage deceleration planetary gear set (13) is connected with the right half shaft (12) through the universal joint (D) at the upper end of the right half shaft. 5. A distributed drive axle assembly for electric vehicles according to claim 4, characterized in that, the other end of the right half shaft (12) is connected to the right wheel ( 11) Transmission connection. 6 . A distributed drive axle assembly for an electric vehicle according to claim 1 , wherein the reducer, the motor M1 ( 1 ) and the motor M2 ( 10 ) are all arranged on the vehicle body. 7. A distributed drive axle assembly for an electric vehicle according to claim 1, wherein the cover assembly is jointly driven by dual motors, specifically: The power of the motor M1 (1) is output to the right half through the two-stage deceleration of the motor M1 primary reduction driving gear (2), the motor M1 primary reduction driven gear (9), and the motor M1 secondary reduction planetary gear set (13). shaft (12), then pass to the right wheel (11) through the universal joint (C) at the lower end of the right half shaft; The power of the motor M2 (10) is output to the left half shaft through the two-stage deceleration of the motor M2 primary reduction driving gear (8), the motor M2 primary reduction driven gear (4), and the motor M2 secondary reduction planetary gear set (5). (6), then pass to the left wheel (7) by the universal joint (B) at the lower end of the left half shaft.