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CN112706598A - Vehicle with double-motor drive axle - Google Patents

  • ️Tue Apr 27 2021

CN112706598A - Vehicle with double-motor drive axle - Google Patents

Vehicle with double-motor drive axle Download PDF

Info

Publication number
CN112706598A
CN112706598A CN202110038722.6A CN202110038722A CN112706598A CN 112706598 A CN112706598 A CN 112706598A CN 202110038722 A CN202110038722 A CN 202110038722A CN 112706598 A CN112706598 A CN 112706598A Authority
CN
China
Prior art keywords
gear
reduction module
transmission speed
driving motor
motor
Prior art date
2021-01-12
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
CN202110038722.6A
Other languages
Chinese (zh)
Inventor
张庆鹏
许电波
赵飞翔
李彬
王坤玉
曹洋洋
徐秀良
公彦峰
陈冠中
宋莉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sinotruk Jinan Power Co Ltd
Original Assignee
Sinotruk Jinan Power Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
2021-01-12
Filing date
2021-01-12
Publication date
2021-04-27
2021-01-12 Application filed by Sinotruk Jinan Power Co Ltd filed Critical Sinotruk Jinan Power Co Ltd
2021-01-12 Priority to CN202110038722.6A priority Critical patent/CN112706598A/en
2021-04-27 Publication of CN112706598A publication Critical patent/CN112706598A/en
Status Withdrawn legal-status Critical Current

Links

  • 230000005540 biological transmission Effects 0.000 claims abstract description 123
  • 230000009467 reduction Effects 0.000 claims abstract description 98
  • 238000000034 method Methods 0.000 claims abstract description 7
  • 238000001816 cooling Methods 0.000 claims description 9
  • 230000007246 mechanism Effects 0.000 claims description 8
  • 239000000498 cooling water Substances 0.000 claims description 7
  • 239000000110 cooling liquid Substances 0.000 claims description 6
  • 239000007788 liquid Substances 0.000 claims description 6
  • 230000009194 climbing Effects 0.000 claims description 5
  • 230000001133 acceleration Effects 0.000 claims description 3
  • 230000008859 change Effects 0.000 claims description 3
  • 238000011084 recovery Methods 0.000 claims description 3
  • 239000013589 supplement Substances 0.000 claims description 3
  • 230000009471 action Effects 0.000 claims description 2
  • 230000007935 neutral effect Effects 0.000 claims description 2
  • 230000008878 coupling Effects 0.000 abstract description 7
  • 238000010168 coupling process Methods 0.000 abstract description 7
  • 238000005859 coupling reaction Methods 0.000 abstract description 7
  • 238000011217 control strategy Methods 0.000 abstract description 5
  • 230000009977 dual effect Effects 0.000 description 5
  • 238000005265 energy consumption Methods 0.000 description 4
  • 238000009434 installation Methods 0.000 description 3
  • 230000010354 integration Effects 0.000 description 3
  • 239000000047 product Substances 0.000 description 3
  • 238000004519 manufacturing process Methods 0.000 description 2
  • 238000001338 self-assembly Methods 0.000 description 2
  • 230000009286 beneficial effect Effects 0.000 description 1
  • 239000003638 chemical reducing agent Substances 0.000 description 1
  • 230000007812 deficiency Effects 0.000 description 1
  • 238000012986 modification Methods 0.000 description 1
  • 230000004048 modification Effects 0.000 description 1
  • 239000003381 stabilizer Substances 0.000 description 1

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K1/02—Arrangement or mounting of electrical propulsion units comprising more than one electric motor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K11/00—Arrangement in connection with cooling of propulsion units
    • B60K11/02—Arrangement in connection with cooling of propulsion units with liquid cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K17/00—Arrangement or mounting of transmissions in vehicles
    • B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location or kind of gearing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K17/00—Arrangement or mounting of transmissions in vehicles
    • B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location or kind of gearing
    • B60K17/16—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location or kind of gearing of differential gearing
    • B60K17/165—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location or kind of gearing of differential gearing provided between independent half axles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
    • F16H37/02—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings
    • F16H37/06—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts
    • F16H37/08—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing
    • F16H37/0806—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing with a plurality of driving or driven shafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/023—Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H2057/02039—Gearboxes for particular applications
    • F16H2057/02043—Gearboxes for particular applications for vehicle transmissions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H2200/00—Transmissions for multiple ratios
    • F16H2200/0021—Transmissions for multiple ratios specially adapted for electric vehicles

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Structure Of Transmissions (AREA)

Abstract

The invention provides a vehicle with a double-motor electric drive axle and a driving method, wherein power output by a first driving motor M1 is transmitted to a third cylindrical gear transmission speed reduction module; the power output by the first driving motor M1 is transmitted to a first half shaft and a second half shaft to drive a first wheel and a second wheel; the power output by the second driving motor M2 passes through the first gear transmission speed reduction module and the second gear transmission speed reduction module in sequence and is merged with the power output by the first driving motor M1 at the third gear transmission speed reduction module. Through configuring different working modes and control strategies, different coupling of driving forces under different vehicle speeds and different loads is achieved, real-time power distribution is achieved, the double motors share two gears for gear shifting, the output torque of the motors and the working of the motors in a high-efficiency interval can be further improved while the gear shifting reliability is guaranteed, and the power performance and the economical efficiency of the whole vehicle are improved.

Description

Vehicle with double-motor drive axle

Technical Field

The invention relates to the technical field of automobiles, in particular to a vehicle with a double-motor drive axle.

Background

From the technical development trend of new energy automobile electric drive systems at home and abroad, the development is generally towards the integration and integration of power systems. In domestic and foreign vehicle enterprises such as Tesla, general use, daily product, China first steam, Dongfeng, Changan and the like, a driving motor, a gearbox, a speed reducer, an axle and the like are integrated as electric drive assembly products. Through the integrated design, can further reduce the volume weight of assembly on the one hand, improve power, volume, the moment of torsion density of system, on the other hand promotes the NVH level of electric drive assembly through integrating with the matching that becomes more meticulous, and the serialization of being convenient for, mass production improve the commonality of product and reduce development and manufacturing cost.

At present, new energy commercial uses car electric drive axle mostly adopts electric motor car single motor matching AMT gearbox, single motor matching reduction gear, bi-motor matching reduction gear and bi-motor matching AMT gearbox scheme, and mostly is single motor scheme, and its system integration is lower, specifically embodies: the power assembly occupies a large space and is large in weight, a single motor considers large design allowance for meeting complex working conditions, a large-power motor is adopted, and during operation under most actual conditions, the required power is small, so that the actual load rate of the motor is at a low level, the driving motor runs in a low-efficiency area for a long time, and the energy consumption of the whole vehicle is high.

Disclosure of Invention

In order to overcome the above-mentioned deficiencies in the prior art, the present invention provides a vehicle having a dual-motor drive axle, comprising: the bicycle comprises a bicycle body, wherein a bicycle frame is arranged on the bicycle body;

the frame is provided with a first driving motor M1, a second driving motor M2, a first transmission assembly, a second transmission assembly, a first wheel and a second wheel;

the first transmission assembly is provided with a first gear transmission speed reduction module, a second gear transmission speed reduction module, a third cylindrical gear transmission speed reduction module, a planetary speed reduction module, a direct-connection differential, a first half shaft and a second half shaft;

the second transmission assembly is provided with a first gear transmission speed reduction module and a second gear transmission speed reduction module;

the first driving motor M1 is connected with the first gear transmission speed reduction module;

the first gear transmission speed reducing module is connected with the second gear transmission speed reducing module in a matching way;

the second gear transmission speed reduction module is in meshed connection with the third cylindrical gear transmission speed reduction module;

the third cylindrical gear transmission speed reduction module is provided with an intermediate shaft and a gear speed change and gear shift module, and the intermediate shaft is sleeved with an intermediate shaft gear; the intermediate shaft gear is meshed with the gear shifting module;

the intermediate shaft is also connected with a sun gear of the planetary reduction module, and the planetary reduction module is connected with the direct-connected differential;

the direct-connection differential is connected with a first wheel through a first half shaft;

the direct-connection differential is connected with a second wheel through a second half shaft;

the output end of the second driving motor M2 is connected with the third gear transmission speed reduction module through the first gear transmission speed reduction module and the second gear transmission speed reduction module in sequence.

It should be further noted that the second gear reduction module includes: a fourth gear, a first gear, a second gear and a first shaft;

the fifth gear reduction module includes: a fifth gear, a sixth gear, a third gear and a second shaft;

the fourth gear, the first gear and the second gear are respectively sleeved on the first shaft and are connected in a matched manner through keys;

the fifth gear, the sixth gear and the third gear are respectively sleeved on the second shaft and are connected in a matched manner through keys;

the fourth gear is in meshed connection with the first gear transmission speed reduction module; the first gear and the second gear are respectively meshed with the third cylindrical gear transmission speed reduction module;

the fifth gear is in meshed connection with the first gear transmission speed reduction module; and the sixth gear and the third gear are respectively in meshed connection with the third cylindrical gear transmission speed reduction module.

It should be further noted that the first driving motor M1 and the second driving motor M2 respectively include: a stator and a rotor rotatable about a stator axis;

the rotor of the first driving motor M1 is connected with the first gear transmission speed reduction module through a spline;

the rotor of the second driving motor M2 is connected with the first gear transmission speed reduction module through a spline.

It should be further noted that the first driving motor M1 and the second driving motor M2 further include: a liquid cooling system;

the liquid cooling system comprises a cooling water channel, and cooling liquid in the cooling water channel drives the cooling liquid to circularly flow through the cooling driving part.

It is further noted that the third gear reduction module includes: the first transmission gear, the second transmission gear, the first gear transmission bearing and the second gear transmission bearing are arranged on the first transmission gear;

the third transmission gear is arranged on the second half shaft through a second gear transmission bearing;

the second transmission gear is arranged on the second half shaft through a first gear transmission bearing;

and a gear shifting combination sleeve is arranged between the third transmission gear and the second transmission gear, is in meshed connection with an external spline of the intermediate shaft through internal spline teeth, and realizes left-right sliding in the axial direction of the intermediate shaft.

It should be further noted that the planetary reduction module includes: a sun gear, a planetary gear set and a ring gear;

the sun gear is connected with the intermediate shaft through a key, the planetary gear set is connected with the gear ring in a matched mode, and the planetary gear set is connected with the differential in a matched mode.

It should be further noted that the sun gear of the planetary reduction module is fixed on an axle housing of the frame.

According to the technical scheme, the invention has the following advantages:

according to the invention, different coupling of driving forces under different speeds and different loads is realized by configuring different working modes and control strategies, real-time power distribution is realized, the double motors share two-gear shifting, the reliability of shifting is ensured, the output torque of the motors and the working of the motors in a high-efficiency interval can be further improved, and the dynamic property and the economical efficiency of the whole vehicle are improved.

The double-motor structure can still ensure the normal running function of one group of motors when the motors fail, and improves the safety of the whole vehicle.

According to the electric drive axle, the motor and the axle are deeply integrated, so that the weight of the axle assembly is greatly reduced, and the energy consumption of the whole automobile is reduced; the space of the whole vehicle is improved. The integrated design of the electric axle is not only an innovation of the structure, but also the design of the whole vehicle chassis is simplified by the self-assembly power assembly system, the installation space of the chassis is saved, and the noise of the whole vehicle power system and the transmission system is reduced.

The invention realizes different coupling of driving force under different speeds and different loads by matching two sets of driving motor systems to share one AMT gearbox, realizes real-time power distribution, and improves the power performance of the whole vehicle by simultaneously working double motors when accelerating rapidly, overtaking, high-speed and climbing; the single motor is driven under the common working condition, so that the load rate of the motor is improved, the working high-efficiency area of the motor is optimized, and the economy of the whole vehicle is improved; the dual-motor configuration can still ensure the normal running function of one group of motors when the motors fail, thereby improving the safety of the whole vehicle; the dual motors share two gears for gear shifting, the gear shifting reliability is guaranteed, meanwhile, the output torque of the motors and the working of the motors in a high-efficiency interval can be further improved, and the power economy is improved.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description will be briefly introduced, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

FIG. 1 is a schematic illustration of a vehicle having a dual-motor electric drive axle;

FIG. 2 is a schematic view of an embodiment of a vehicle having a dual-motor electric drive axle;

FIG. 3 is a schematic view of a third spur gear drive reduction module and a planetary reduction module.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The present invention provides a vehicle having a dual-motor electric drive axle, as shown in fig. 1 to 3, including: the bicycle comprises a bicycle body, wherein a bicycle frame is arranged on the bicycle body;

the vehicle is based on electric vehicle driving motor + AMT + transmission shaft + axle commercial vehicle mainstream power chain configuration, including integrated form bi-motor electric drive axle.

The frame is provided with a first driving motor M11, a second driving motor M214, a first transmission component, a second transmission component, a

first wheel

8 and a

second wheel

15;

the first transmission assembly is provided with a first gear transmission speed reduction module 2, a second gear transmission

speed reduction module

3, a third cylindrical gear transmission

speed reduction module

4, a planetary

speed reduction module

5, a direct-connection

differential mechanism

6, a

first half shaft

7 and a

second half shaft

13;

the second transmission component is provided with a first gear transmission

speed reduction module

12 and a second gear transmission

speed reduction module

11;

the first driving motor M11 is connected with the first gear transmission speed reduction module 2;

the first gear transmission speed reduction module 2 is connected with the second gear transmission

speed reduction module

3 in a matching way; the second gear transmission

speed reduction module

3 is meshed with the third cylindrical gear transmission

speed reduction module

4;

the third cylindrical gear transmission

speed reduction module

4 is provided with an

intermediate shaft

9 and a 2-gear speed change and

gear shift module

10, and an intermediate shaft gear is sleeved on the

intermediate shaft

9; the intermediate shaft gear is meshed with the 2-gear speed-changing and gear-

shifting module

10; the

intermediate shaft

9 is also connected with a sun gear of the

planetary reduction module

5, and the

planetary reduction module

5 is connected with the direct-connected

differential mechanism

6;

the direct-connected

differential mechanism

6 is connected with a

first wheel

8 through a

first half shaft

7; the direct-coupled

differential

6 is connected with a

second wheel

15 through a

second half shaft

13; the output end of the second driving motor M214 is connected with the third gear transmission

speed reduction module

4 sequentially through the first gear transmission

speed reduction module

12 and the second gear transmission

speed reduction module

11.

According to the invention, a first driving motor M1 is a main driving motor, the power torque of the first driving motor M1 is more than or equal to that of a second driving motor M2, and the first driving motor M1 is used for working conditions of flat road starting, slow acceleration and medium and low speed running; the second driving motor M2 is an auxiliary driving motor, and the second driving motor M2 is used for power supplement, and provides power output for climbing, starting and accelerating, overtaking, high speed and braking energy recovery for the vehicle.

According to the invention, different coupling of driving forces under different speeds and different loads is realized by configuring different working modes and control strategies, real-time power distribution is realized, the double motors share two-gear shifting, the reliability of shifting is ensured, the output torque of the motors and the working of the motors in a high-efficiency interval can be further improved, and the dynamic property and the economical efficiency of the whole vehicle are improved.

The double-motor structure can still ensure the normal running function of one group of motors when the motors fail, and improves the safety of the whole vehicle.

According to the electric drive axle, the motor and the axle are deeply integrated, so that the weight of the axle assembly is greatly reduced, and the energy consumption of the whole automobile is reduced; the space of the whole vehicle is improved. The integrated design of the electric axle is not only an innovation of the structure, but also the design of the whole vehicle chassis is simplified by the self-assembly power assembly system, the installation space of the chassis is saved, and the noise of the whole vehicle power system and the transmission system is reduced.

The present invention provides a vehicle having a dual electric drive axle when an element or layer is referred to as being "on" and "connected" or "coupled" to another element or layer, it may be directly on, connected or coupled to the other element or layer, or intervening elements or layers may also be present. In contrast, when an element is referred to as being "directly on," "directly connected to" or "directly coupled to" another element or layer, there are no intervening elements or layers present. Like numbers refer to like elements throughout. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The terminology used herein with respect to vehicles having dual electric drive axles is for the purpose of describing particular embodiments only and is not intended to be limiting of the description within this document. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

As an embodiment provided by the present invention, the second geared

reduction module

3 includes: a fourth gear 3-0, a first gear 3-1, a second gear 3-2 and a first shaft 3-3;

the fifth

gear reduction module

11 includes: a fifth gear 11-0, a sixth gear 11-1, a third gear 11-2 and a second shaft 11-3;

the fourth gear 3-0, the first gear 3-1 and the second gear 3-2 are respectively sleeved on the first shaft 3-3 and are connected in a matched manner through keys; the fifth gear 11-0, the sixth gear 11-1 and the third gear 11-2 are respectively sleeved on the second shaft 11-3 and are connected in a matched manner through keys;

the fourth gear 3-0 is meshed with the first gear transmission speed reduction module 2; the first gear 3-1 and the second gear 3-2 are respectively meshed with the third cylindrical gear transmission

speed reduction module

4; the fifth gear 11-0 is meshed with the first gear transmission

speed reduction module

12; the sixth gear 11-1 and the third gear 11-2 are respectively in meshed connection with the third cylindrical gear transmission

speed reduction module

4.

As an example of the provision of the present invention,

the first drive motor M11 and the second drive motor M214 respectively include: a stator and a rotor rotatable about a stator axis; the rotor of the first driving motor M11 is connected with the first gear transmission speed reduction module 2 through a spline; the rotor of the second drive motor M214 is splined to the first geared

reduction module

12.

Wherein, the first driving motor M11 and the second driving motor M214 further include: a liquid cooling system; the liquid cooling system comprises a cooling water channel, and cooling liquid in the cooling water channel drives the cooling liquid to circularly flow through the cooling driving part.

For the third

gear reduction module

4 of the invention, the third

gear reduction module

4 comprises: a first transmission gear 4-1, a second transmission gear 4-2, a first gear transmission bearing 4-3 and a second gear transmission bearing 4-4; the third transmission gear 4-1 is arranged on the

second half shaft

13 through a second gear transmission bearing 4-4; the second transmission gear 4-2 is arranged on the

second half shaft

13 through a first gear transmission bearing 4-3; a gear shifting combination sleeve is arranged between the third transmission gear 4-1 and the second transmission gear 4-2, and the gear shifting combination sleeve is meshed and connected with an external spline of the

intermediate shaft

9 through internal spline teeth and realizes the left-right sliding in the axial direction of the

intermediate shaft

9.

The

planetary reduction module

5 includes: a sun gear 5-1, a planetary gear set 5-2 and a ring gear 5-3; the sun gear 5-1 is in key connection with the

intermediate shaft

9, the planetary gear set 5-2 is in matched connection with the ring gear 5-3, and the planetary gear set 5-2 is in matched connection with the

differential mechanism

6. The sun wheel of the

planetary reduction module

5 is fixed on the axle housing of the frame. The differential 6 may be in a differential structure commonly used in the art, and the specific structure is not limited.

The integrated double-motor electric drive axle provided by the invention can effectively improve the dynamic property, the economical efficiency and the safety of a new energy commercial vehicle, and is convenient for realizing the chassis specialization and the power assembly serialization.

The dual motors are beneficial to realizing the modularization of a driving motor system, the development difficulty of a high-power large-torque motor is reduced, the types of the motors are reduced, and the serialization expansion of axles with different tonnages is convenient to realize.

In the invention, in order to acquire the rotating speed of the differential mechanism, a gear ring is arranged on a differential mechanism shell, and a non-contact type vehicle speed sensor is arranged on an axle shell and is used for providing a vehicle speed signal for a whole vehicle and providing a rotating speed reference for a gear shifting control strategy.

In order to meet the requirements of service and parking braking, the axle housing is also provided with a corresponding brake, an air chamber, a brake mounting plate and a required ABS sensor assembly related mounting structure and an interface.

In order to meet the requirements of bearing and connecting with a vehicle frame, the axle housing is also provided with installation structures and interfaces such as relevant plate springs, thrust rods, stabilizer bars, hubs and the like.

In order to meet the arrangement requirements of the first driving motor, the second driving motor and related sensor high-low voltage wiring harnesses and cooling water pipes, the axle housing is further provided with related mounting fixing points or bracket mounting points.

The invention realizes different coupling of driving force under different speeds and different loads by matching two sets of driving motor systems to share one AMT gearbox, realizes real-time power distribution, and improves the power performance of the whole vehicle by simultaneously working double motors when accelerating rapidly, overtaking, high-speed and climbing; the single motor is driven under the common working condition, so that the load rate of the motor is improved, the working high-efficiency area of the motor is optimized, and the economy of the whole vehicle is improved; the dual-motor configuration can still ensure the normal running function of one group of motors when the motors fail, thereby improving the safety of the whole vehicle; the dual motors share two gears for gear shifting, the gear shifting reliability is guaranteed, meanwhile, the output torque of the motors and the working of the motors in a high-efficiency interval can be further improved, and the power economy is improved.

Based on the above embodiment, the driving method of the present invention is:

the power output by the first driving motor M1 is transmitted to the third cylindrical gear transmission speed reduction module through the first gear transmission speed reduction module and the second gear transmission speed reduction module in sequence;

the sun gear of the planetary reduction module is connected through the intermediate shaft, and the planetary reduction module is connected with the direct-connected differential mechanism;

transmitting the power output from the first drive motor M1 to the first and second half shafts to drive the first and second wheels;

the power output by the second driving motor M2 passes through the first gear transmission speed reduction module and the second gear transmission speed reduction module in sequence and is merged with the power output by the first driving motor M1 at the third gear transmission speed reduction module.

Under the action of a 2-gear speed-changing and gear-shifting module in the third cylindrical gear transmission speed-reducing module, the switching of 3 gear states is realized; namely, a high gear I, a low gear II and a neutral gear.

The first driving motor M1 is a main driving motor, the power torque of the first driving motor M1 is more than or equal to that of the second driving motor M2, and the first driving motor M1 is used for working conditions of level road starting, slow acceleration and medium and low speed running;

the second driving motor M2 is an auxiliary driving motor, and the second driving motor M2 is used for power supplement, and provides power output for climbing, starting and accelerating, overtaking, high speed and braking energy recovery for the vehicle.

Furthermore, through motor coupling and gear shifting, the following different working modes can be realized:

Figure BDA0002894616110000081

Figure BDA0002894616110000091

the motor M1 is a main driving motor, the motor M2 is an auxiliary driving motor, and the main driving motor and the auxiliary driving motor can exchange positions; the first gear of the gearbox is a first gear, a large speed ratio and the second gear is a small speed ratio.

According to the invention, different coupling of driving forces under different speeds and different loads is realized by configuring different working modes and control strategies, real-time power distribution is realized, the double motors share two-gear shifting, the reliability of shifting is ensured, the output torque of the motors and the working of the motors in a high-efficiency interval can be further improved, and the dynamic property and the economical efficiency of the whole vehicle are improved.

The double-motor structure can still ensure the normal running function of one group of motors when the motors fail, and improves the safety of the whole vehicle.

According to the electric drive axle, the motor and the axle are deeply integrated, so that the weight of the axle assembly is greatly reduced, and the energy consumption of the whole automobile is reduced; the space of the whole vehicle is improved.

The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A vehicle having a dual-motor electric drive axle, comprising: the bicycle comprises a bicycle body, wherein a bicycle frame is arranged on the bicycle body;

a first driving motor M1(1), a second driving motor M2(14), a first transmission component, a second transmission component, a first wheel (8) and a second wheel (15) are arranged on the frame;

the first transmission assembly is provided with a first gear transmission speed reducing module (2), a second gear transmission speed reducing module (3), a third cylindrical gear transmission speed reducing module (4), a planetary speed reducing module (5), a direct-connected differential (6), a first half shaft (7) and a second half shaft (13);

the second transmission component is provided with a first gear transmission speed reduction module (12) and a second gear transmission speed reduction module (11);

the first driving motor M1(1) is connected with the first gear transmission speed reduction module (2);

the first gear transmission speed reducing module (2) is connected with the second gear transmission speed reducing module (3) in a matching way;

the second gear transmission speed reducing module (3) is meshed with the third cylindrical gear transmission speed reducing module (4);

the third cylindrical gear transmission speed reduction module (4) is provided with an intermediate shaft (9) and a 2-gear speed change and gear shift module (10), and an intermediate shaft gear is sleeved on the intermediate shaft (9); the intermediate shaft gear is meshed with the 2-gear speed-changing and gear-shifting module (10);

the intermediate shaft (9) is also connected with a sun gear of the planetary reduction module (5), and the planetary reduction module (5) is connected with the direct-connected differential (6);

the direct-connected differential (6) is connected with a first wheel (8) through a first half shaft (7);

the direct-connected differential (6) is connected with a second wheel (15) through a second half shaft (13);

the output end of the second driving motor M2(14) is connected with the third gear transmission speed reduction module (4) through the first gear transmission speed reduction module (12) and the second gear transmission speed reduction module (11) in sequence.

2. Vehicle with dual-motor electric drive axle according to claim 1,

the second geared reduction module (3) comprises: a fourth gear (3-0), a first gear (3-1), a second gear (3-2) and a first shaft (3-3);

the fifth gear reduction module (11) comprises: a fifth gear (11-0), a sixth gear (11-1), a third gear (11-2) and a second shaft (11-3);

the fourth gear (3-0), the first gear (3-1) and the second gear (3-2) are respectively sleeved on the first shaft (3-3) and are connected in a matched manner through keys;

the fifth gear (11-0), the sixth gear (11-1) and the third gear (11-2) are respectively sleeved on the second shaft (11-3) and are connected in a matched manner through keys;

the fourth gear (3-0) is meshed with the first gear transmission speed reduction module (2); the first gear (3-1) and the second gear (3-2) are respectively meshed with the third cylindrical gear transmission speed reduction module (4);

the fifth gear (11-0) is meshed with the first gear transmission speed reduction module (12); the sixth gear (11-1) and the third gear (11-2) are respectively meshed with the third cylindrical gear transmission speed reduction module (4).

3. Vehicle with dual-motor electric drive axle according to claim 1,

the first drive motor M1(1) and the second drive motor M2(14) each include: a stator and a rotor rotatable about a stator axis;

the rotor of the first driving motor M1(1) is connected with the first gear transmission speed reduction module (2) through a spline;

the rotor of the second driving motor M2(14) is connected with the first gear transmission speed reduction module (12) through a spline.

4. Vehicle with dual-motor electric drive axle according to claim 3,

the first drive motor M1(1) and the second drive motor M2(14) further include: a liquid cooling system;

the liquid cooling system comprises a cooling water channel, and cooling liquid in the cooling water channel drives the cooling liquid to circularly flow through the cooling driving part.

5. Vehicle with dual-motor electric drive axle according to claim 1,

the third geared reduction module (4) comprises: a first transmission gear (4-1), a second transmission gear (4-2), a first transmission bearing (4-3) and a second transmission bearing (4-4);

the third transmission gear (4-1) is arranged on the second half shaft (13) through a second gear transmission bearing (4-4);

the second transmission gear (4-2) is arranged on the second half shaft (13) through a first gear transmission bearing (4-3);

a gear shifting combination sleeve is arranged between the third transmission gear (4-1) and the second transmission gear (4-2), and the gear shifting combination sleeve is meshed and connected with an external spline of the intermediate shaft (9) through internal spline teeth and realizes left-right sliding in the axial direction of the intermediate shaft (9).

6. Vehicle with dual-motor electric drive axle according to claim 1,

the planetary reduction module (5) comprises: a sun gear (5-1), a planetary gear set (5-2) and a ring gear (5-3);

the sun gear (5-1) is in key connection with the intermediate shaft (9), the planetary gear set (5-2) is in matched connection with the gear ring (5-3), and the planetary gear set (5-2) is in matched connection with the differential (6).

7. Vehicle with dual-motor electric drive axle according to claim 1,

the sun wheel of the planetary speed reducing module (5) is fixed on the axle housing of the frame.

8. A driving method with a dual-motor drive axle, characterized in that the method employs a vehicle with a dual-motor drive axle according to any one of claims 1 to 7;

the method comprises the following steps:

the power output by the first driving motor M1 is transmitted to the third cylindrical gear transmission speed reduction module through the first gear transmission speed reduction module and the second gear transmission speed reduction module in sequence;

the sun gear of the planetary reduction module is connected through the intermediate shaft, and the planetary reduction module is connected with the direct-connected differential mechanism;

transmitting the power output from the first drive motor M1 to the first and second half shafts to drive the first and second wheels;

the power output by the second driving motor M2 passes through the first gear transmission speed reduction module and the second gear transmission speed reduction module in sequence and is merged with the power output by the first driving motor M1 at the third gear transmission speed reduction module.

9. The driving method with the dual-motor drive axle according to claim 8,

under the action of a 2-gear speed-changing and gear-shifting module in the third cylindrical gear transmission speed-reducing module, the switching of 3 gear states is realized; namely, a high gear I, a low gear II and a neutral gear.

10. The driving method with the dual-motor drive axle according to claim 8,

the first driving motor M1 is a main driving motor, the power torque of the first driving motor M1 is more than or equal to that of the second driving motor M2, and the first driving motor M1 is used for working conditions of level road starting, slow acceleration and medium and low speed running;

the second driving motor M2 is an auxiliary driving motor, and the second driving motor M2 is used for power supplement, and provides power output for climbing, starting and accelerating, overtaking, high speed and braking energy recovery for the vehicle.

CN202110038722.6A 2021-01-12 2021-01-12 Vehicle with double-motor drive axle Withdrawn CN112706598A (en)

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