CN212875585U

CN212875585U - Coaxial asynchronous electric drive system

Info

Publication number: CN212875585U
Application number: CN202021668294.2U
Authority: CN
Inventors: 任传委; 毕路; 刘怀远
Original assignee: Weiran Nanjing Power Technology Co ltd
Current assignee: Weiran Nanjing Power Technology Co ltd
Priority date: 2020-08-12
Filing date: 2020-08-12
Publication date: 2021-04-02
Anticipated expiration: 2030-08-12

Abstract

The utility model discloses an asynchronous electricity of coaxial-type drives system, include: the speed reducer, the motor and the main shell further comprise a motor controller; become motor reducer assembly and install in the main casing after motor and speed reducer are connected, motor controller fixes on the main casing body and is connected with motor reducer assembly, the utility model discloses a system has reduced the parasitic loss of the supplementary electric drive system of pure electric four-wheel drive car, promotes whole car continuation of the journey to compact size, the coaxial electricity of an organic whole drive system do benefit to and realize that the available space maximize of whole car utilizes.

Description

Coaxial asynchronous electric drive system

Technical Field

The utility model relates to an electric automobile field specifically is an asynchronous system of electricity of driving of coaxial-type.

Background

Climate change, energy and environmental issues are long-standing problems that human society faces collectively. With the united states expressing the regression COP15 (united nations climate change framework convention) and the introduction of emerging countries typified by china and india into it, and the active implementation of energy and environmental protection strategies in major countries, the world has entered an era where the common problems of human society are really solved. The three problems of greenhouse gas emission, energy consumption and tail gas emission in the field of transportation are effectively solved, and the common problem of human beings which is directly influenced can be effectively solved, therefore, the governments, organizations, automobile manufacturers, energy suppliers and risk investment enterprises in the main world act together to promote the structure upgrade of the automobile industry in the world and the transformation of the power system electric strategy, promote the formation of the electric automobile social basic industry with a multi-layer structure and the construction of corresponding policies and organization guarantee systems, and promote the formation of the electric automobile society with sustainable development.

As an important force of world energy consumption and environmental protection, China actively implements the science and technology strategy of electric automobiles, promotes the upgrading of industrial structures and the electric transformation of power systems in the automobile industry, cultivates and develops the society of electric automobiles, achieves certain effects, reduces the emission of greenhouse gases in the traffic field, is an important means for solving global climate change, and is a precondition for building the society of sustainable development of electric automobiles. The electric automobile has no waste gas generated by the internal combustion engine during the operation of the automobile, does not generate exhaust pollution, is very beneficial to environmental protection and air cleaning, and almost has zero pollution. On the other hand, the application of electric vehicles can effectively reduce the dependence on petroleum resources, and limited petroleum can be used for more important aspects.

At present, permanent magnet synchronous motors are mostly adopted by pure electric four-wheel drive automobiles, P4 type electric bridge four-wheel drive hybrid automobiles and the like. However, in most cases, especially during high-speed cruising, the permanent magnet auxiliary driving system does not output torque, but consumes energy to realize zero-torque control, which reduces the endurance mileage of the whole vehicle. At present, most electric driving systems adopt a parallel shaft speed reducer which has a larger size, particularly along the vehicle length direction, although the structure is simple, and the maximum utilization of the available space of the whole vehicle is not facilitated.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: in order to solve the deficiency of the prior art, the utility model provides a can promote whole car continuation of the journey to compact structure's asynchronous electricity of coaxial-type drives the system.

The technical scheme is as follows: in order to realize above purpose, the utility model provides a pair of asynchronous electricity of coaxial-type drives system, include: the motor and the speed reducer are connected to form a motor speed reducer assembly and are arranged in the main shell, and the motor controller is fixed on the main shell and is connected with the motor speed reducer assembly; the input shaft and the output shaft of the speed reducer are on the same straight line, and the hollow motor shaft of the motor is provided with a speed reducer input gear; the motor controller controls a hollow motor shaft upper gear of the driving motor to be meshed with the intermediate shaft assembly, then the torque is transmitted to the integral differential mechanism and is output to two sides through the integral differential mechanism, a differential mechanism half shaft gear spline on one side is connected with a whole vehicle half shaft, a differential mechanism half shaft gear spline on the other side is connected with a short half shaft, and the short half shaft penetrates through a motor rotor and is provided with a spline and a retaining ring at the exposed end of the motor for being connected with a spline in the whole vehicle half shaft.

As the utility model discloses a further preferred, the jackshaft assembly supports respectively on gear box cap and main casing assembly through first jackshaft conical bearing and second jackshaft conical bearing.

As a further preference of the present invention, the differential side gear spline is connected with the motor side stub axle.

As the utility model discloses a further preferred, motor side stub axle and high-speed oil blanket rotary seal, high-speed oil blanket outer lane and hollow motor shaft interference seal, the oil blanket rotates along with the motor shaft, the inboard and motor side stub axle rotary seal of oil blanket.

As the utility model discloses a further preferred, the short semi-axis of motor side passes through the short semi-axis of motor side and supports the bearing and support on the short semi-axis bearing frame of motor side.

As a further preferred aspect of the present invention, the main housing is provided with a rear suspension thread group, a front suspension thread group, a motor side front suspension thread group, and a motor side rear suspension thread group.

As a further preference of the present invention, the rear suspension thread group is used for mounting a near differential suspension bracket on the system gear box side; the front suspension thread group is used for installing a far differential suspension bracket at the side of a system gearbox; the side front suspension thread group is used for installing a front suspension bracket at the motor side of the system; the motor side rear suspension thread group is used for installing a rear suspension bracket on the motor side of the system.

As a further preference of the utility model, the water inlet water injection well choke and the motor delivery port water injection well choke of the motor controller that are located on the main casing body are at the homonymy.

As the utility model discloses a further preferred, motor controller exposes motor controller side three-phase copper bar and motor controller side temperature and becomes signal and interface soon from self sealed casing, and motor controller passes through four fixing bolt of motor rear end cap and installs on the motor reduction gear assembly.

As the utility model discloses a further preferred, the distance between motor controller's top and the gearbox side output end centre of a circle department is not more than 210mm, and the size directly influences whole car EDS top available space.

As the utility model discloses a further preferred, the distance between gearbox side output centre of a circle department and the main casing body bottom is not more than 143mm, and the size influences whole car ground clearance.

As the utility model discloses a further preferred, the distance between the tip of headstock direction on gearbox side output end centre of a circle department and the main casing body is not more than 188mm, and the size occupies vehicle front overhang space size, and less L31 more is favorable to putting in order the great preceding case of being equipped with of car integration.

As a further preference of the utility model, gearbox side output end centre of a circle department and the main casing body on the end in the locomotive opposite direction between the distance be not more than 143mm, the size occupies the length dimension between the vehicle two axles, the size directly influences battery package length dimension and arranges.

As the utility model discloses a further preferred, the distance between gearbox side output centre of a circle department and the motor side output is not more than 520mm, and the size occupies the finite size between two-wheeled of vehicle drive wheel, and direct influence both sides semi-axis length, the size length then leads to the semi-axis short, and the life-span of semi-axis short direct influence universal joint, NVH performance surpass limit motion range even.

Has the advantages that: the utility model discloses an asynchronous system of electricity of driving of coaxial-type compares with prior art, has following advantage:

1. the parasitic loss of an auxiliary electric drive system of the pure electric four-wheel drive automobile is reduced, and the endurance of the whole automobile is improved;

2. the coaxial electric drive system has compact size and is integrated, and the maximum utilization of the available space of the whole vehicle is facilitated.

Drawings

Fig. 1 is a sectional view and a power transmission path diagram of the present invention.

Fig. 2 is a schematic structural view after the installation of the present invention is completed;

fig. 3 is a front view of the present invention;

fig. 4 is a rear view of the present invention;

fig. 5 is a left side view of the present invention;

fig. 6 is a right side view of the present invention;

fig. 7 is a part diagram of the present invention.

Wherein the reference numerals are as follows:

1 rear end cover of motor

2 main casing

3 electric machine water channel shell

4 stator assembly

5 cast aluminum rotor

6 hollow motor shaft

8 high-speed bearing

9 differential mechanism supporting seat

12 integral differential

13 gearbox shell cover

15 side output oil seal of gearbox

17 intermediate shaft assembly

19 water inlet of motor controller

20 motor controller

21 motor side stub axle

22 motor side output oil seal

23 motor side stub axle support bearing

24 motor side short half shaft bearing seat

25 rotating assembly

26 high-speed bearing at rear end of motor

61 hollow motor shaft upper gear

171 intermediate shaft assembly primary driven gear

172 middle shaft assembly two-stage driving gear

200 motor

211 motor side short half shaft exposed end external spline and retainer ring

300 speed reducer

2011 three-phase copper bar on side of motor controller

2012 side temperature and rotary change signal of motor controller and interface

2015 three-phase copper bar of motor

2018 rear end cover of motor

A7 high-speed oil seal

A11 differential cone bearing

A16 first intermediate shaft conical bearing

Screw thread group for AM1 rear suspension

Thread group for BM2 front suspension

CM3 motor side is screw thread group for front suspension

DM4 motor side rear suspension screw thread group

B10 high-speed oil seal

B14 differential cone bearing

B18 second intermediate shaft conical bearing

W1 end face friction stir weld

W2 annular friction stir welding

Y1 water inlet nozzle

Y2 water outlet nozzle

AB1, BB2, CB3 and DB4 bolts

Detailed Description

The invention will be further elucidated with reference to the drawings and the specific embodiments.

The utility model discloses an asynchronous system of driving of coaxial-type, as shown in FIG. 1, become the motor reducer assembly and install in main casing body 2 after motor 200 and speed reducer 300 are connected, motor controller 20 passes through the bolt fastening on main casing body 2 and is connected with the motor reducer assembly.

As shown in fig. 2 and 3, the main housing is provided with a rear suspension thread group AM1, a front suspension thread group BM2, a motor side front suspension thread group CM3 and a motor side rear suspension thread group DM4, the rear suspension thread group AM1 is used for mounting a near differential suspension bracket on the system gearbox side, the front suspension thread group BM2 is used for mounting a far differential suspension bracket on the system gearbox side, the side front suspension thread group CM3 is used for mounting a front suspension bracket on the system motor side, and the motor side rear suspension thread group DM4 is used for mounting a rear suspension bracket on the system motor side.

As shown in fig. 2, 3 and 4, the distance between the top of the motor controller and the center of the output end at the gear box side is not more than 210mm, and the size directly influences the available space above the EDS of the whole vehicle; the distance between the circle center of the output end at the gear box side and the bottom of the main shell is not more than 143mm, and the size influences the ground clearance of the whole vehicle; the distance between the circle center of the output end at the side of the gear box and the end part of the main shell in the direction of the head of the vehicle is not more than 188mm, the size occupies the size of a front overhang space of the vehicle, and the smaller L31 is more favorable for integrating a larger front spare box of the whole vehicle; the distance between the circle center of the output end at the gear box side and the end part of the main shell in the opposite direction of the head is not more than 143mm, the size occupies the length size between two shafts of the vehicle, and the size directly influences the length size arrangement of the battery pack; the distance between the circle center of the gear box side output end and the motor side output end is not more than 520mm, the size occupies the limited size between two wheels of a vehicle driving wheel, the length of half shafts on two sides is directly influenced, the half shafts are short due to the long size, the service life of the universal joint is directly influenced due to the fact that the half shafts are too short, and the NVH performance even exceeds the limit motion range.

As shown in FIG. 5, the water inlet nozzle Y1 of the motor controller 20 on the main housing 2 is on the same side as the motor water outlet nozzle Y2.

As shown in fig. 6, the motor controller 20 exposes the three-phase copper bar 2011 on the motor controller side and the temperature and rotation signal and interface 2012 on the motor controller side from the self-sealed housing, and the motor controller 20 is installed on the motor reducer assembly through the motor rear end cover 2018, that is, through 4 fixing bolts, namely, the bolt AB1, the bolt BB2, the bolt CB3 and the bolt DB4, so as to realize non-exposure connection. Three-phase copper bar 2011 of motor controller side and the three-phase copper bar 2015 of motor, motor controller side temperature all realize through in the motor rear end cover with the rotary transformer signal and interface 2012 not to expose and be connected.

As shown in fig. 7, the utility model provides a pair of asynchronous electricity of coaxial-type drives system, include: the motor rear end cover 1, the main shell 2, the motor water channel shell 3, the stator assembly 4, the cast aluminum rotor 5, the hollow motor shaft 6, the hollow motor shaft upper gear 61, the high-speed oil seal A7, the high-speed bearing 8, the differential supporting seat 9, the high-speed oil seal B10, the differential conical bearing A11, the integral differential 12, the gear box shell cover 13, the differential conical bearing B14, the gear box side output oil seal 15, the first intermediate shaft conical bearing A16, the intermediate shaft assembly 17, the intermediate shaft assembly primary driven gear 171, the intermediate shaft assembly secondary driving gear 172, the second intermediate shaft conical bearing B18, the motor controller water inlet 19, the motor controller 20, the motor side stub axle 21, the motor side stub axle exposed end external spline and the retaining ring 211, the motor side output oil seal 22, the motor side stub axle supporting bearing 23, the motor side stub axle bearing 24, the rotary variable rotary assembly 25, the motor rear end high-speed, An end face friction stir weld W1 and a ring friction stir weld W2.

The motor rear end cover 1 and the main shell 2 assembly are connected together by bolts, an end face friction stir welding seam W1 and an annular friction stir welding seam W2 are adopted between the main shell 2 and the motor water channel shell 3 to form the main shell 2, and the stator assembly 4 is pressed into the main shell 2 in an interference manner.

The hollow motor shaft 6 is pressed into the cast aluminum rotor 5 in an interference manner, the outer ring of the high-speed oil seal A7 is sealed with the main shell 2 in an interference manner and is rotationally sealed with the hollow motor shaft 6, the differential supporting seat 9 is fixed on the main shell 2 through bolts, the outer ring of the high-speed bearing 8 is pressed at one side of the differential supporting seat to realize bearing limiting, the outer ring of the high-speed oil seal 2 is sealed with the hollow motor shaft 6 in an interference manner, the oil seal rotates along with the hollow motor shaft 6, and the inner side of; the outer ring of the differential cone bearing A11 is arranged in a bearing seat hole of the differential support seat 9 to support one side of the differential; the second-stage driven gear of the integral differential 12 is directly and integrally processed with a shell on one side of the differential, the second-stage driven gear is welded with the shell on the other side of the differential by laser after the differential gear system is assembled, and the outer ring of a differential cone bearing B14 is arranged in a bearing seat hole of a gear box shell cover 13 to support one side of the differential; the gear box side output oil seal 15 is rotationally sealed with the inner section of the whole vehicle half shaft, and the intermediate shaft assembly 17 is respectively supported on the gear box shell cover 13 and the main shell 2 through a first intermediate shaft conical bearing A16 and a second intermediate shaft conical bearing B18; the motor side stub axle 21 is in spline connection with a differential side gear and is rotationally sealed with a high-speed oil seal B10, and is supported on a motor side stub axle bearing seat 24 through a motor side stub axle bearing 23; the motor side output oil seal 22 is arranged on a motor side short half shaft bearing seat 24, and the inner side of the motor side output oil seal is in rotary seal with the motor side short half shaft 21; the stator of the rotating transformer assembly 25 is fixedly mounted on the motor-side stub axle bearing block 24, and the rotor thereof is mounted on the hollow motor shaft 6.

Examples

The motor controller 20 converts the direct current into three-phase alternating current required by the asynchronous motor 100 to drive the motor rotor, so that torque is output from the gear 61 on the hollow motor shaft and is transmitted to the primary driven gear 171 of the intermediate shaft assembly meshed with the gear 61 on the hollow motor shaft, and the torque is subjected to primary torque increase through the primary gear pair; the torque is transmitted to the engaged integral differential 12 through a secondary driving gear 172 of the intermediate shaft assembly 17, and the torque is increased for the second time through a secondary gear pair; then output to both sides through the integral differential 12; because the integral differential mechanism 12 and the asynchronous motor 100 of the utility model are on the same axis, the motor side short half shaft 21 is adopted, one side of the motor side short half shaft is connected with the differential mechanism half shaft gear spline, the other side of the motor side short half shaft passes through the motor rotor and is provided with the motor side short half shaft exposed end external spline and the retainer ring 211 at the exposed end of the motor side short half shaft, and the motor side short half shaft exposed end external spline and the retainer ring are used for being connected with the internal spline of the motor; the side half shaft inner section of the whole vehicle gear box adopts a conventional external spline, is directly inserted into the integral differential mechanism 12 and is connected with the half shaft gear and limited.

Comparative experimental data

Size of	The utility model discloses	Parallel shaft structure
			L1	<210mm	200-210mm
L2	<143mm	145-155mm
			L3	<331mm	450-470mm
L31	<188mm	320-350mm
			L32	<143mm	145-155mm
L4	<520mm	480-500mm

The above embodiments are only for illustrating the technical conception and the features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All changes and modifications that come within the spirit of the invention are desired to be protected.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An asynchronous electric drive system of the coaxial type, comprising: the speed reducer, the motor and the main shell are characterized by further comprising a motor controller;

the motor and the speed reducer are connected to form a motor speed reducer assembly and are arranged in the main shell, and the motor controller is fixed on the main shell and is connected with the motor speed reducer assembly;

the input shaft and the output shaft of the speed reducer are on the same straight line, and a hollow motor shaft of the motor is provided with a speed reducer input gear;

the motor controller controls and drives a gear on a hollow motor shaft of the motor to be meshed with the intermediate shaft assembly, then torque is transmitted to the integral differential mechanism, the torque is output to two sides through the integral differential mechanism, a differential mechanism half shaft gear spline on one side is connected with a whole vehicle half shaft, a differential mechanism half shaft gear spline on the other side is connected with a short half shaft, and the short half shaft penetrates through a motor rotor and is provided with a spline and a check ring at the exposed end of the motor for being connected with a spline in the whole vehicle half shaft.

2. The coaxial asynchronous electric drive system of claim 1, wherein: the intermediate shaft assembly is respectively supported on the gear box shell cover and the main shell assembly through a first intermediate shaft conical bearing and a second intermediate shaft conical bearing.

3. The coaxial asynchronous electric drive system of claim 1, wherein: and the differential mechanism half shaft gear spline is connected with the motor side short half shaft.

4. A coaxial asynchronous electric drive system according to claim 3, characterized in that: and the motor side short half shaft and the high-speed oil seal are in rotary seal.

5. A coaxial asynchronous electric drive system according to claim 3, characterized in that: the motor side short half shaft is supported on the motor side short half shaft bearing seat through a motor side short half shaft supporting bearing.

6. The coaxial asynchronous electric drive system of claim 1, wherein: the main shell is provided with a thread group for rear suspension, a thread group for front suspension, a thread group for motor side front suspension and a thread group for motor side rear suspension.

7. The coaxial asynchronous electric drive system of claim 6, wherein:

the rear suspension thread group is used for mounting a near differential suspension bracket at the side of a system gearbox;

the front suspension thread group is used for mounting a far differential suspension bracket on the side of a system gearbox;

the side front suspension thread group is used for installing a front suspension bracket on the motor side of the system;

the motor side rear suspension thread group is used for installing a rear suspension bracket on the motor side of the system.

8. The coaxial asynchronous electric drive system of claim 1, wherein: the water nozzle at the water inlet of the motor controller on the main shell is positioned at the same side as the water nozzle at the water outlet of the motor.

9. The coaxial asynchronous electric drive system of claim 1, wherein: the motor controller exposes the three-phase copper bar at the side of the motor controller and the temperature, rotation and transformation signal and interface at the side of the motor controller from a self-sealed shell, and the motor controller is installed on a motor reducer assembly through four fixing bolts of a rear end cover of the motor.

10. The coaxial asynchronous electric drive system of claim 1, wherein:

the distance between the top of the motor controller and the center of the output end of the gear box side is not more than 210 mm;

the distance between the circle center of the output end of the gear box side and the bottom of the main shell is not more than 143 mm;

the distance between the circle center of the side output end of the gearbox and the end part of the main shell in the direction of the head of the main shell is not more than 188 mm;

the distance between the circle center of the output end at the side of the gearbox and the end part of the main shell in the opposite direction of the headstock is not more than 143 mm;

the distance between the circle center of the output end of the gear box side and the output end of the motor side is not more than 520 mm.