CN210733715U

CN210733715U - Two-stage speed reduction electric drive axle with double motors and single-speed parallel shaft output

Info

Publication number: CN210733715U
Application number: CN201921544501.0U
Authority: CN
Inventors: 王歆胤; 李群刚; 张凯铄; 张晨男; 陈海明
Original assignee: Dongfeng Dana Axle Co Ltd
Current assignee: Dongfeng Dana Axle Co Ltd
Priority date: 2019-09-17
Filing date: 2019-09-17
Publication date: 2020-06-12
Anticipated expiration: 2029-09-17

Abstract

The utility model discloses a two-stage speed reduction electricity that bi-motor single-speed parallel shaft exported drives transaxle. Belongs to the technical field of new energy vehicles. It solves current drive axle of electricity and has the motor to generate heat great and occupy the problem that chassis structural arrangement space. It is mainly characterized in that: the differential mechanism comprises a first motor, a second motor, a speed reducer, a differential mechanism, a first half shaft and a second half shaft; the reducer comprises two pairs of meshed primary driving gears and primary driven gears, and two meshed secondary reducer driving wheels and a secondary reducer driven wheel; the motor shafts of the first motor and the second motor are respectively integrated with the two primary driving gears; the first motor, the second-stage reduction driven wheel and the differential are arranged by adopting parallel shafts. The utility model has the characteristics of the coaxial compact design of structure, transmission efficiency are high, be convenient for chassis structural arrangement, the dead weight is light and improve whole car economic nature, the second grade speed reduction electricity that mainly used bi-motor single-speed parallel shaft exported drives the transaxle.

Description

Two-stage speed reduction electric drive axle with double motors and single-speed parallel shaft output

Technical Field

The utility model belongs to the technical field of new energy automobile. In particular to a two-stage speed reduction electric drive axle with double motors and single-speed parallel shaft output.

Background

With the development of science and technology and the requirements of environmental protection and energy conservation, the development of the power chain of the whole vehicle is changed from the original engine, the gearbox and the traditional axle into the currently adopted motor and the transmission axle to provide power, and most manufacturers adopt an external single-motor structure at present. The structure is limited by factors such as motor power, an efficient working area and the like, the cost is too high under the condition of higher bearing, the heat generated by the motor is increased, the service life of the motor is influenced and the like; the size of each part is large, the number of the parts is large, the integration level is too low, the arrangement space of a chassis structure is occupied, the arrangement number of batteries and the transmission efficiency are influenced, and the driving range of the vehicle is short; the power performance and the economical efficiency of the whole vehicle are hardly considered.

Disclosure of Invention

In order to overcome the defects of the prior art, the utility model provides a two-stage speed reduction electric drive axle with double motors and single-speed parallel shaft output.

In order to achieve the above object, the utility model adopts the following technical solutions: the utility model provides a two-level speed reduction electricity that double motor single-speed parallel shaft exported drives axle, includes first motor, reduction gear, differential mechanism, first semi-axis and second semi-axis, its characterized in that: the speed reducer comprises two pairs of meshed primary driving gears and primary driven gears, two meshed secondary speed reducer driving wheels and a secondary speed reduction driven wheel, and the primary driven gears and the secondary speed reducer driving wheels are coaxially arranged; the device also comprises a second motor; the first motor shaft of the first motor is integrated with one primary driving gear, and the second motor shaft of the second motor is integrated with the other primary driving gear; the first motor, the second-stage reduction driven wheel and the differential are arranged in a parallel shaft mode.

The technical solution of the utility model in the output of first motor and second motor respectively with the spline toothing of two one-level driving gears.

The technical solution of the utility model in the first motor be the driving motor of the same model with the second motor.

The technical proposal of the utility model is that the secondary speed reduction driven wheel and the differential mechanism are integrated to form a secondary speed reduction driven wheel and a differential mechanism; the secondary speed reduction driven wheel and the differential are respectively connected with the first half shaft and the second half shaft through meshing sleeve splines.

The technical solution of the utility model in first motor and second motor for the vertical plane mirror symmetry at first semi-axis and second semi-axis place distribute.

The first motor and the second motor in the technical solution of the utility model are driving motors with the same model; the secondary speed reduction driven wheel and the differential are designed integrally to form a secondary speed reduction driven wheel and a differential; the secondary speed reduction driven wheel and the differential are respectively in splined connection with the first half shaft and the second half shaft through meshing sleeves; the first motor and the second motor are distributed in a mirror symmetry mode relative to a vertical plane where the first half shaft and the second half shaft are located.

The utility model discloses a bi-motor is as the power supply, with motor shaft and one-level speed reduction driving gear design as an organic whole, and the one-level speed reduction is as an organic whole from driving wheel second grade speed reduction action wheel design, and the second grade speed reduction is from driving wheel and differential mechanism design an organic whole, and differential mechanism and semi-axis are in the same place through the spline connection, transmit the wheel through the semi-axis, have realized under the circumstances that the assurance bi-motor rotational speed is the same, transmit the wheel with power from the motor. The utility model discloses a parallel shaft arranges that it is more reasonable to make reduction gear spatial structure arrange, arranges differential mechanism on second grade speed reduction driven gear, and further spatial arrangement is compact ingenious. The utility model discloses a second grade speed reduction has reduced the transmission chain, makes whole car efficiency higher. The utility model discloses a motor, reduction gear transversal arrangement have saved the chassis space for whole car can arrange more batteries, has improved the continuation of the journey mileage of whole car.

Compared with the prior art, the utility model, have the characteristics that the coaxial compact design of structure, transmission efficiency are high, the chassis structural arrangement of being convenient for, the dead weight is light and improve whole car economic nature, the overheated scheduling problem that brings in the greatly reduced high-power motor use. The utility model discloses the electric drive axle of the output of the double-motor single-speed parallel shaft of mainly used.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

In the figure: 1-a first motor, 2-a first motor shaft and a primary driving gear, 3-a first driven gear and a secondary reducer driving gear, 4-a secondary reduction driven gear and a differential, 5-a second motor, 6-a second motor shaft and a primary driving gear, 7-a second driven gear and a secondary reducer driving gear, 8-a first half shaft, 9-a second half shaft, 10-a first wheel and 11-a second wheel.

Detailed Description

As shown in fig. 1, the utility model relates to a two-stage speed reduction electric drive axle of two motor single-speed parallel shaft output, including first motor 1, second motor 5, reduction gear, differential mechanism, first semi-axis 8, second semi-axis 9, first wheel 10 and second wheel 11. The reducer comprises two pairs of meshed first-stage driving gears and first-stage driven gears, two meshed second-stage reducer driving wheels and a second-stage reducer driven wheel, and the first-stage driven gears and the second-stage reducer driving wheels are coaxially arranged. The first motor shaft of the first motor 1 and a first-stage driving gear are integrally designed to form the first motor shaft and the first-stage driving gear 2. The second motor shaft of the second motor 5 and another primary driving gear are integrally designed to form the second motor shaft and the primary driving gear 6. The output ends of the first motor 1 and the second motor 5 are respectively meshed with the splines of the two primary driving gears. The first motor 1 and the second motor 5 are drive motors of the same type. The sum of the power of the first motor 1 and the power of the second motor 5 are equal to the power of the existing single motor, so that the size and the mass of the first motor 1 and the second motor 5 can be relatively small, the chassis structure space balance arrangement is facilitated, the arrangement number of batteries is not influenced, and the heating is reduced. The first motor 1, the second motor 5, the second-stage reduction driven wheel and the differential mechanism are arranged by adopting parallel shafts. The secondary speed reduction driven wheel and the differential mechanism are designed integrally to form a secondary speed reduction driven wheel and a differential mechanism 4, and the secondary speed reduction driven wheel and the differential mechanism 4 are connected with the first half shaft 8 and the second half shaft 9 through meshing sleeve splines respectively. The first electric machine 1 and the second electric machine 5 are arranged in mirror symmetry with respect to a vertical plane in which the first half shaft 8 and the second half shaft 9 are located, i.e. the first electric machine 1 and the second electric machine 5 have the same horizontal height, and the first electric machine 1 and the second electric machine 5 have the same distance from the half shafts.

The utility model discloses a first motor 1, second motor 5 and second grade speed reduction adopt the parallel axis to arrange from driving wheel and differential mechanism 4. The first motor shaft and the first-stage driving gear 2 are integrally designed with the second motor shaft and the first-stage driving gear 6, namely, the first motor shaft and the first-stage driving gear are used as a motor output shaft and are also used as a speed reducer input driving gear. The first driven gear and secondary speed reducer driving wheel 3 and the second driven gear and secondary speed reducer driving wheel 7 are integrally designed, and the secondary speed reduction driven wheel and the differential mechanism 4 are integrally designed.

During normal work, first motor shaft and one-level driving gear 2 and second motor shaft and one-level driving gear 6 drive first driven gear and secondary reduction gear action wheel 3, second driven gear and secondary reduction gear action wheel 7, first driven gear and secondary reduction gear action wheel 3 and second driven gear and secondary reduction gear action wheel 7 drive second grade reduction from driving wheel and differential mechanism 4, second grade reduction is from driving wheel and differential mechanism 4 drive first semi-axis 8, second semi-axis 9, both pass through spline fit, first semi-axis 8, second semi-axis 9 drives first wheel 10, second wheel 11, thereby make power pass to the wheel from the motor.

Because the secondary speed reduction driven wheel and the differential 4 are not provided with power coupling devices, the output speeds of the two motors to the driven wheel are the same in the normal running process.

The utility model discloses electricity drives transaxle and adopts bi-motor, second grade speed reduction, parallel shaft to arrange, and the structure of this kind of compactness is arranged and can be reduced high-power motor and use, and reduce cost shortens the driving chain, raises the efficiency, reduces the shared space of axle, reduces the weight of whole axle, increases the battery capacity in carriage, promotes the vehicle and continues to go the mileage.

Claims

1. The utility model provides a two-stage reduction electric drive axle of two motor single-speed parallel shaft output, includes first motor (1), reduction gear, differential mechanism, first semi-axis (8) and second semi-axis (9), its characterized in that: the speed reducer comprises two pairs of meshed primary driving gears and primary driven gears, two meshed secondary speed reducer driving wheels and a secondary speed reduction driven wheel, and the primary driven gears and the secondary speed reducer driving wheels are coaxially arranged; also comprises a second motor (5); a first motor shaft of the first motor (1) is integrated with one primary driving gear, and a second motor shaft of the second motor (5) is integrated with the other primary driving gear; the first motor (1), the second motor (5), the secondary speed reduction driven wheel and the differential mechanism are arranged in a parallel shaft mode.

2. The two-stage speed reduction electric drive axle with double motors and single-speed parallel shaft output according to claim 1, is characterized in that: the output ends of the first motor (1) and the second motor (5) are respectively meshed with the splines of the two primary driving gears.

3. The two-stage deceleration electric drive axle with double motors and single-speed parallel shaft output according to claim 1 or 2, characterized in that: the first motor (1) and the second motor (5) are driving motors with the same model.

4. The two-stage deceleration electric drive axle with double motors and single-speed parallel shaft output according to claim 1 or 2, characterized in that: the secondary speed reduction driven wheel and the differential are designed integrally to form a secondary speed reduction driven wheel and a differential (4); the secondary speed reduction driven wheel and the differential (4) are respectively connected with the first half shaft (8) and the second half shaft (9) through meshing sleeve splines.

5. The two-stage deceleration electric drive axle with double motors and single-speed parallel shaft output according to claim 1 or 2, characterized in that: the first motor (1) and the second motor (5) are distributed in a mirror symmetry mode relative to a vertical plane where the first half shaft (8) and the second half shaft (9) are located.

6. The two-stage deceleration electric drive axle with double motors and single-speed parallel shaft output according to claim 1 or 2, characterized in that: the first motor (1) and the second motor (5) are driving motors with the same model; the secondary speed reduction driven wheel and the differential are designed integrally to form a secondary speed reduction driven wheel and a differential (4); the secondary speed reduction driven wheel and the differential (4) are respectively in splined connection with a first half shaft (8) and a second half shaft (9) through meshing sleeves; the first motor (1) and the second motor (5) are distributed in a mirror symmetry mode relative to a vertical plane where the first half shaft (8) and the second half shaft (9) are located.