CN207921266U - A kind of full-time electric four-wheel drive system of centralization - Google Patents
A kind of full-time electric four-wheel drive system of centralization Download PDFInfo
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- CN207921266U CN207921266U CN201820365577.6U CN201820365577U CN207921266U CN 207921266 U CN207921266 U CN 207921266U CN 201820365577 U CN201820365577 U CN 201820365577U CN 207921266 U CN207921266 U CN 207921266U
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Abstract
The utility model discloses a kind of full-time electric four-wheel drive system of centralization, including：Main driving mechanism, power output shaft are engaged with the gear ring of center differential；First planetary gear train comprising the first sun gear, the first planetary gear, first planet carrier and the first gear ring；Second planetary gear train comprising the second sun gear, the second planetary gear and the second gear ring；Third planet train comprising third sun gear, the third line star-wheel, the second planet carrier and third gear ring fourth planet train comprising the 4th sun gear, fourth line star-wheel and the 4th gear ring；Double-rotor machine is provided at both ends with the first gear of output end and second output terminal gear, and first gear of output end is engaged with second gear ring, and the second output terminal gear is engaged with the 4th gear ring.By controlling the first output end of double-rotor machine and the size and Orientation of second output terminal output torque and then controlling the size and Orientation of torque distribution between automobile antero posterior axis and rear axle wheel.
Description
Technical field
The utility model is related to technical field of automobile transmission, and more particularly, the utility model is related to a kind of centralization is complete
When electric four-wheel drive system.
Background technology
In recent years, it is constantly progressive with the improvement of people ' s living standards with technology, people also put forward the quality of automobile
Increasingly higher demands are gone out, by being initially only gradually transitioned into safety, comfort, economy as the demand of walking-replacing tool
Property in the demands such as driving pleasure, people are also increasing year by year the demand of high-performing car.Therefore, for high-performing car
Innovation Input be also very necessary.
The drive form of orthodox car mainly have two-wheel drive and 4 wheel driven driving, but no matter the automobile of which kind of drive form,
Contain drive axle on the axle of driving mostly, wherein differential mechanism is the important component in drive axle.Due to " the differential of differential mechanism
Not poor torsion " principle causes the driving torque that engine transmits that can only be evenly distributed on the wheel of both sides, adheres to not on road surface in this way
Traction can not be just utilized in the case of equalization well, or even the case where wheel-slip occurs in low attachment side, is made
Driving driveability is lost at vehicle.In addition, automobile is in tempo turn, since the load of inside shifts outward, it is also possible to
It causes inboard wheel to reach limit of adhesion generation to trackslip and make automobile unstability.If driving torque can arbitrarily divide between the wheel of both sides
Match, then can be significantly reduced above-mentioned stranded and unstability operating mode.When both sides wheel be in road surface attachment it is unequal when, driving torque
It can be by the lateral high attachment side transfer of low attachment one, to eliminate the operating mode that low attachment single wheel skids.When automobile is in height
When speed turning, if driving torque is by inboard wheel, wheel shifts outward, can prevent inboard wheel from trackslipping, and increase whole
The lateral force nargin of vehicle, while an additional yaw moment is generated, which can help to push and guide turn inside diameter, carry
High turn inside diameter mobility and limit cornering ability.
Centralization driving and distributed driving can be divided into according to driveline arrangement form drive system, the former is in tradition
There is application in internal-combustion engines vehicle and new-energy automobile, and the latter often uses wheel hub motor, wheel motor or wheel hub hydraulic pressure
Motor is placed on distribution in each wheel and directly drives vehicle.Distribution driving can easily realize four-wheel drive, and
General wheel hub motor is placed on direct drive of wheel in wheel, not excessive transmission system, therefore simple in structure, space hold
Small, transmission efficiency, a kind of excellent driving form of can yet be regarded as.However at this stage, the universal power density of wheel hub motor is faced not
High, motor working environment, which badly causes poor reliability, wheel hub motor to increase unsprung mass, leads to the technologies such as automobile ride reduction
Bottleneck has seriously affected its large-scale use, thus at present most of electric vehicle still using and internal combustion engine driving automotive-type as
Central drive form.Internal combustion engine or centralized hybrid power power assembly (Hybrid Powertrain) or driving electricity
Machine is often arranged in as the power source concentrated in front-axle engine cabin, and this single centralized power source is (dynamic for mixing
Force system generally has multiple power sources, but mainstream is all to become one to form one with internal combustion engine, speed changer or coupling device
The hybrid power assembly of concentration) conventional central centralization transmission system can only be used, if therefore central driving vehicle need to
Want four-wheel drive, then need a transfer device or coupling device by power separate a part be transferred to other axle shafts (when
So, electric vehicle is often much smaller than internal combustion engine or hybrid power assembly due to motor price and volume, therefore there are also electricity at present
Dynamic 4 wheel driven vehicle respectively respectively drives the shape of forward and backward bridge using front-rear axle with a single motor matching main reducing gear, differential mechanism
Formula, such as tesla's Model S electric vehicles.The configuration is not belonging to this patent since front-rear axle uses two different power sources
The centralization driving range).
Traditional four-wheel drive is divided into due course 4 wheel driven, full-time four according to four-wheel drive system architectural difference and handling capacity difference
It drives, time sharing.In due course 4 wheel driven automobile, often use transmission output shaft side simultaneously two identical gears of external toothing by power
It is transferred to front-rear axle, and increases electromagnetism multiplate clutch before going to non-principal drive axle (generally rear axle) and realizes in due course
Power is transferred to rear axle by ground by transmission shaft.When electromagnetic clutch combines, total drive of half generally at most can be obtained in rear axle
Dynamic torque.So-called exactly not clutch is transferred to rear axle by All Time in conjunction with rear power in due course, and is generally skidded in front-wheel
When or could realize 4 wheel driven when needing 4 wheel driven to work in short-term；Since its kind of drive is that gear drive powers up magnetic multiplate clutch
Mode causes it generally can only the maximum half for being no more than vehicle maximum output torque be shifted output to non-master in a short time
Wheel is driven, therefore such automobile is general by performance, it can only be slight cross-country, but it is best to travel economy.Full-time four-wheel drive, it is past
The transmission shaft of forward and backward bridge is connected toward using inter-axle differential, the torque distribution of front-rear axle is generally mean allocation, also has
Unequal distribution is used a bit, since common open type differential has the characteristics that " the not poor torsion of differential ", in order to ensure to avoid some bridge
Another bridge driving force is caused also to decline when wheel-slip, passability reduces, therefore the inter-axle differential one of such full-time four-wheel drive system
As select limited-slip differential or inter-axle differential with differential lock function to realize the antero posterior axis transfer of torque；Full-time four-wheel drive vapour
Vehicle is furnished between centers limited-slip differential or differential due to being all that four wheels drive in whole running times additionally, due to generally all increasing
Lock, therefore vehicle dynamic property, riding stability and passability are all more many by force than in due course 4 wheel driven, but since its is complicated, of high cost,
Therefore middle and high end 4 wheel driven SUV or high-end 4 wheel driven cars are generally only applied to, and due to always four-wheel drive, generally can not achieve
The torque distribution of active is up to uniaxial type of drive, therefore it is poor to travel economy.Time sharing, often in speed changer or speed change
Newly-increased transfer gear after device realizes that power is transferred to non-principal drive axle by switching the engagement of transfer gear middle gear and exiting
(bridge before generally).Motor torque is further amplified typically with bottom gear for transfer gear, meets limit cross-country power and wants
It asks.Time sharing single shaft travels good economy performance when driving.But power is transmitted with up to front-rear axle when by manipulating transfer gear
After becoming four-wheel drive, since it does not have inter-axle differential generally, therefore it can not run at high speed in normal paved road, Zhi Neng
Non- paved road carries out low-speed off-road.And due to body structure, car weight, axle device without differential, tire etc., 4 wheel driven is whole when working
Vehicle travels economy and control stability differs greatly with full-time four-wheel drive or in due course 4 wheel driven.
In general, full-time four-wheel drive form is relatively preferable, but for full-time four-wheel drive system in the prior art, due to it
The open differential of use has the characteristic of " the not poor torsion of differential ", when the attachment of automobile antero posterior axis road surface is inconsistent, then may lead
The wheel slip on low attachment side axle is caused, causes automobile is stranded can not travel.Or when automobile emergency accelerates, load is by front axle
Shaft rotation is moved backward, it is also possible to be caused front axle wheel to reach limit of adhesion generation and be trackslipped and make automobile unstability.Although in the prior art
Various between centers limited-slip differentials or shaft space difference speed lock can be connected by part locking or complete locking the transmission shaft of front-rear axle come
Realize that torque shifts supreme attachment axle from low attachment axle, avoids wheel-slip, raising trafficability, but the axis of torque
Between transfer distribution be unidirectional, i.e., can only move driving moment from the fast axis of rotating speed toward the slow shaft rotation of rotating speed.This can not be promoted
Mobility and driveability of the vehicle under various road conditions.In addition, multigroup friction plate is being compressed and is being disconnected in limited-slip differential
When there are mechanical slip frictions, which increase idle power consumptions.
Therefore, the shortcomings that the utility model is intended to overcome the above-mentioned prior art proposes that one kind having both torque between centers and wheel
The full-time electric four-wheel drive system of centralization of fixed direction allocation function, the full-time electric four-wheel drive system can be applied to the electronic vapour of 4 wheel driven
Vehicle also can be applied to four-drive hybrid electric vehicle or 4 wheel driven internal combustion engine powered vehicle by changing power source.
Utility model content
The utility model provides a kind of full-time electric four-wheel drive system of centralization, it is therefore an objective to solve on current four-wheel drive car
Driving torque can not realize the problem of orientation distributes between centers orientation distributes and takes turns simultaneously, by controlling birotor
Between first output end of motor and the size and Orientation of second output terminal output torque and then control automobile antero posterior axis and rear axle wheel
The size and Orientation of torque distribution.
Technical solution provided by the utility model is：
A kind of full-time electric four-wheel drive system of centralization, including：
Main driving mechanism, power output shaft are engaged with the gear ring of center differential；
Wherein, the sun gear of the center differential and first output axis connection, the planet carrier of the center differential with
Second output axis connection, first output shaft are connect by deceleration mechanism with the shell of first bevel gear differential mechanism, and second is defeated
Shaft is connect by deceleration mechanism with the shell of second bevel gear differential mechanism；
First planetary gear train comprising the first sun gear, the first planetary gear, first planet carrier and the first gear ring；
Second planetary gear train comprising the second sun gear, the second planetary gear and the second gear ring；
Wherein, first sun gear is connect with the planet carrier of the center differential, and empty set is defeated described first
On shaft, second sun gear exports axis connection, first planetary gear and the coaxial arrangement of the second planetary gear with described first
In the first planet carrier, the second gear ring empty set is on first output shaft；
Third planet train comprising third sun gear, the third line star-wheel, the second planet carrier and third gear ring
Fourth planet train comprising the 4th sun gear, fourth line star-wheel and the 4th gear ring；
Wherein, the second half axis connection, the 4th sun gear and the first bevel gear of the third sun gear and rear axle
The shell of differential mechanism connects, and empty set, in the rear on the second semiaxis of axis, the third line star-wheel and fourth line star-wheel are coaxial
It is arranged on second planet carrier, the first half axis connection of the first axle shaft gear of the first bevel gear differential mechanism and rear axle,
The second half axis connection of second axle shaft gear of the first bevel gear differential mechanism and rear axle；
Double-rotor machine is provided at both ends with the first gear of output end and second output terminal gear, first output end
Gear is engaged with second gear ring, and the second output terminal gear is engaged with the 4th gear ring.
Preferably, the center differential further includes fifth line star-wheel, around the planet carrier week of the center differential
To being uniformly distributed and center empty set is supported on the planet carrier of the center differential, the two neighboring fifth line star-wheel is nibbled
It closes, is engaged with the sun gear of the center differential on the inside of the fifth line star-wheel, the gear ring in outside and the center differential
Engagement.
Preferably, the first bevel gear differential mechanism further includes：
First planetary gear shaft passes through first bevel gear differential casing center, and is rotatably supported at institute
On the shell for stating first bevel gear differential mechanism；
First cone planetary gear is fixedly mounted in first planetary gear shaft, and simultaneously with described the first half
Shaft gear and the second axle shaft gear external toothing；
Second cone planetary gear is fixedly mounted in first planetary gear shaft, and simultaneously with described the first half
Shaft gear and the second axle shaft gear external toothing；
Wherein, first cone planetary gear and second cone planetary gear are symmetrical arranged.
Preferably, the first half axis connection of the third axle shaft gear of the second bevel gear differential mechanism and front axle, described the
The second half axis connection of 4th axle shaft gear of two bevel differentials and front axle
Preferably, the second bevel gear differential mechanism further includes：
Second planetary gear shaft passes through second bevel gear differential casing center, and is rotatably supported at institute
On the shell for stating second bevel gear differential mechanism；
Third cone planetary gear is fixedly mounted in second planetary gear shaft, and simultaneously with the third half
Shaft gear and the 4th axle shaft gear external toothing；
4th cone planetary gear is fixedly mounted in second planetary gear shaft, and simultaneously with the third half
Shaft gear and the 4th axle shaft gear external toothing；
Wherein, the third cone planetary gear and the 4th cone planetary gear are symmetrical arranged.
Preferably, first planetary gear and the second planetary gear be circumferentially uniformly distributed rotating around the first planet carrier and
Center empty set is supported in the first planet carrier；The two neighboring first planetary gear engagement, the first planetary gear inside
It is engaged with the first sun gear, outside is engaged with the first gear ring；The two neighboring second planetary gear engagement, second planetary gear
Inside is engaged with the second sun gear, and outside is engaged with the second gear ring.
Preferably, the third line star-wheel and fourth line star-wheel be circumferentially uniformly distributed rotating around second planet carrier and
Center empty set is supported on second planet carrier；Two neighboring the third line star-wheel engagement, the third line star-wheel inside
It is engaged with third sun gear, outside is engaged with third gear ring；The two neighboring fourth line star-wheel engagement, the fourth line star-wheel
Inside is engaged with the 4th sun gear, and outside is engaged with the 4th gear ring.
Preferably, the gear ring that the power output shaft of the main driving mechanism passes through output gear and the center differential
Engagement；The drive bevel gear of deceleration mechanism, the shell of the first bevel gear differential mechanism described in the first output axis connection connect
Connect the driven wheel of differential of the deceleration mechanism, the drive bevel gear and driven wheel of differential engaged transmission.
Preferably, second output shaft is connect by transmission shaft with the second bevel gear differential mechanism, the transmission
Axis is provided at both ends with universal driving device.
Preferably, the planet row characterisitic parameter of the center differential is 2；First planetary gear train and the second planet
The planet row characterisitic parameter of train is identical；The third planet train is identical with the planet row characterisitic parameter of fourth planet train.
It is described in the utility model to have the beneficial effect that：
(1) the full-time electric four-wheel drive system of centralization provided by the utility model, solving conventional carrier, " differential is not poor
Turn round " the drawbacks of, while " torsion of differential difference " function, i.e. differential may be implemented torque may be implemented in the arbitrary number in differential mechanism both sides
The identical increasing of absolute value, deduction are matched, and realize both sides or the output of antero posterior axis unequal power.The essential technique feature, can take into account improvement
Vehicle dynamic property, economy, turning mobility, the demand of control stability and passability, improve vehicle comprehensive performance.
(2) the full-time electric four-wheel drive system of centralization provided by the utility model, solving existing full-time four-wheel drive system can only
The technical bottleneck for changing front and back shaft torque allocation proportion in a certain range, may be implemented the arbitrary distribution of torque between antero posterior axis
Function, and respond rapid；Whole power assembly output torques can be transferred to good by limiting case when single shaft has skidded
Another axis adhered to well realizes uniaxial driving, can not have to reduce gross output compared to In-wheel motor driving, ensure that vehicle is dynamic
Power.
(3) the full-time electric four-wheel drive system of centralization provided by the utility model, solving existing full-time four-wheel drive system can only
According to the technical bottleneck that shaft torque before and after the passive change of the speed discrepancy of antero posterior axis or differential mechanism inner friction torque distributes, Ke Yishi
Whatever you like actively changes the function of torque distribution ratio at any time between present antero posterior axis, and responds rapid.
(4) the full-time electric four-wheel drive system of centralization provided by the utility model solves existing full-time four-wheel drive system and is turning
Driving torque can only be unidirectionally transferred to the technical bottleneck of the slow other side of rotating speed by square from the fast side of rotating speed when distributing, both can be with
It realizes that torque moves to the slow side of rotating speed or an axis from the fast single wheel of rotating speed or a shaft rotation, can also realize that torque is slow from rotating speed
Single wheel or a shaft rotation move to the function of the fast side of rotating speed or an axis.
(5) the full-time electric four-wheel drive system of centralization provided by the utility model, collection power source, transmission system, torque distribution
Mechanism completes the driving of four wheels using one power source of centralization in one, compact-sized, integrated level height, platform technology
Inheritance is good.And the distributed type four-wheel-driven system that compares, the utility model need not individually control each wheel hub motor, and only need
Torque fixed direction allocation between centers, trailing wheel being completed at the same time is controlled between a double-rotor machine, executing agency is few, control
Simple system processed is reliable, and control is easy to implement, and system cost is low.
(6) the full-time electric four-wheel drive system of centralization provided by the utility model, compare wheel hub motor distributed type four-wheel-driven system
System does not interfere with the ride comfort of automobile without increasing unsprung mass.
(7) the full-time electric four-wheel drive system of centralization provided by the utility model can be applied to four-drive electric car, also may be used
It is applied to centralized driving formula four-drive hybrid electric vehicle or 4 wheel driven internal combustion engine powered vehicle by changing power source.
Description of the drawings
Fig. 1 is the full-time electric four-wheel drive overall system architecture schematic diagram of centralization described in the utility model.
Fig. 2 is the full-time electric four-wheel drive system dynamic assembly part structural schematic diagram of centralization described in the utility model.
Fig. 3 is the full-time electric four-wheel drive system of centralization described in the utility model in no torque orientation distribution requirements
Under torque flow to schematic diagram.
Fig. 4 is for the full-time electric four-wheel drive system of centralization described in the utility model in driving torque by rear axial front axle between centers
Torque when actively distributing flows to schematic diagram.
Fig. 5 be the full-time electric four-wheel drive system of centralization described in the utility model in driving torque from front axle to rear axle between centers
Torque when actively distributing flows to schematic diagram.
Fig. 6 is for the full-time electric four-wheel drive system of centralization described in the utility model in driving torque by the second semiaxis of rear axle
Torque when actively being distributed to the first semiaxis of rear axle flows to schematic diagram.
Fig. 7 is for the full-time electric four-wheel drive system of centralization described in the utility model in driving torque by the first semiaxis of rear axle
Torque when actively being distributed to the second semiaxis of rear axle flows to schematic diagram.
Fig. 8 is for the full-time electric four-wheel drive system of centralization described in the utility model in driving torque by rear axial front axle between centers
Actively distribution and the second semiaxis of rear axle flow to schematic diagram to torque when actively distributing while occurring between the first half shaft wheel of rear axle.
Specific implementation mode
The following describes the utility model in further detail with reference to the accompanying drawings, to enable those skilled in the art with reference to explanation
Book word can be implemented according to this.
Referring to Fig. 1, the utility model provides a kind of full-time electric four-wheel drive system of centralization, includes mainly front axle drive axle
Assembly 10, driving-shaft assembly 20 and electric four-wheel drive system dynamic assembly 30.Electric four-wheel drive system dynamic assembly 30 passes through transmission shaft
Assembly 20 is connect with front axle driving axis 10, transmits power to front axle.
The front axle driving axis 10 includes mainly front axle Driving axle housing 1001, second bevel gear differential assembly
1002, the first semiaxis of front axle 1003 and the second semiaxis of front axle 1004.Second bevel gear differential assembly 1002 is common open
Bevel differential, mainly by differential casing 10021, the second planetary gear shaft 10022, third cone planetary gear
10023, the parts such as the 4th cone planetary gear axis 10024, third axle shaft gear 10025, the 4th axle shaft gear 10026 form,
Second planetary gear shaft 10022 passes through 10021 center of second bevel gear differential casing and is rotatably supported at described second
On the shell 10021 of bevel differential；Third cone planetary gear 10023 is fixedly mounted on second planetary gear shaft
On 10022, and simultaneously with the third axle shaft gear 10025 and 10026 external toothing of the 4th axle shaft gear；4th circular cone
Planetary gear 10024 is fixedly mounted in second planetary gear shaft 10022, and simultaneously with the third axle shaft gear
10025 and 10026 external toothing of the 4th axle shaft gear；The third cone planetary gear 10023 and the 4th circular cone row
Star gear 10024 is symmetrical arranged, and third axle shaft gear 10025 is connect with 1003 spline of the first semiaxis of front axle, the 4th axle shaft gear
10026 connect with 1004 spline of the second semiaxis of front axle, and the first, second semiaxis of front axle 1003 and 1004 drives wheel with left and right front axle
It is connected, power is exported respectively to left and right front axle and wheel, the second output shaft 3205 is driven to be connected by driving-shaft assembly 20 described
The shell of the drive bevel gear 10027 of deceleration mechanism, the second bevel gear differential assembly 1002 connects the deceleration mechanism
Driven wheel of differential 10028,10028 engaged transmission of the drive bevel gear 10027 and the driven wheel of differential.
The driving-shaft assembly 20 includes mainly transmission shaft 2001, universal driving device 2002 and universal driving device
2003.2001 both ends of transmission shaft are separately connected universal driving device 2002 and universal driving device 2003.Universal driving device
2002 connection front axle driving axis 10.Universal driving device 2003 connects electric four-wheel drive system dynamic assembly 30.Universal drive
Device can be not coaxial in 10 input terminal of front axle driving axis and the 30 output end axis presence of electric four-wheel drive system dynamic assembly
The two basic constant velocity rotation is ensured when situation, and both adaptive axis angle or height change.
Referring to Fig. 1 and Fig. 2, the electric four-wheel drive system dynamic assembly 30, mainly by power take-off unit (main driving machine
Structure) 310, center differential 320, between centers torque distributes coupling planetary gear train 330, torque distribution coupling planetary gear train between wheel
340, first bevel gear differential assembly 370, double-rotor machine output unit 380 and electric four-wheel drive system dynamic assembly shell
3001 are constituted.
The power take-off unit 310 is mainly made of power source 3101 and output gear 3102.The power source 3101
It is fixed on power assembly shell 3001, can be the propulsive power sources such as motor, internal combustion engine or hybrid power assembly, power source
3101 output end is connect with output gear 3102, can export power outward by output gear 3102.It should be noted that dynamic
The output end in power source 3101 increases any gear assembly (i.e. speed changer), clutch or torque-converters cannot be to this practicality
Novel composition substance innovation.
The center differential 320 is mainly by fifth line star wheel series 3200 and the second output shaft 3205 and the first output shaft
3206 are constituted.The fifth line star wheel series 3200 be double-pinion planetary train, including the 5th gear ring 3201, third planet carrier 3202,
5th sun gear 3203 and two group of three fifth line star-wheel 3204 to totally 6 circumference uniform distributions.Wherein the 5th gear ring 3201 is rotatable
Ground is supported on the axis of third planet carrier 3202, and the outside of the 5th gear ring 3201 is fixed with the transmission gear of circumference uniform distribution, and with it is defeated
Go out 3102 external toothing of gear so that the power that power take-off unit 310 exports can be passed to center differential 320.Third planet carrier
3202 first end is fixedly connected with the second output shaft 3205 or spline connect passing power, second end and the first planetary gear train
3300 the first sun gear 3303 is fixedly connected or spline connection passing power.5th sun gear 3203 and the first output shaft 3206
It is fixedly connected or spline connects passing power.Two group of three center to the fifth line star-wheel 3204 of totally 6 circumference uniform distributions is all empty
Set is supported in third planet carrier 3202, on the one hand can surround the second output shaft with the rotation of third planet carrier 3202
3205 and first output shaft 3206 common axis line revolution, on the other hand can also pass around its centre bore and third planet carrier
3202 connected axis (being known as planet wheel spindle) rotations.Each pair of two fifth line star-wheels, the 3204 mutual external toothing being closely located to, and
Close to inside 3203 external toothing of fifth line star-wheel 3204 and the 5th sun gear, while close to outside fifth line star-wheel 3204 and
5th gear ring, 3201 internal messing.Second output shaft 3205 is pivotally supported in power assembly shell 3001, and with universal biography
Dynamic device 2003 connects, and driving torque can be transferred to front axle by driving-shaft assembly 20；First output shaft 3206 is rotatably
Be supported in third planet carrier 3202 in hole axle, and therefrom stretch out with the second sun gear 3403 of the second planetary gear train 3400 with
And main deceleration drive bevel gear 3709 is fixedly connected or spline connection passing power.To ensure that center differential 320 can will be moved
The driving torque 1 to 1 that power output unit 310 exports is assigned to the front axle and rear axle of automobile, the row of fifth line star gear train 3200
Star, which arranges characterisitic parameter, must be equal to 2.
The between centers torque distribution coupling planetary gear train 330 is mainly by the first planetary gear train 3300 and the second planetary gear train
3400 are constituted, their planet row characterisitic parameter must be identical, and the type of planet row must be consistent.First planetary gear train
3300 the first planetary gears including the first gear ring 3301, first planet carrier 3302, the first sun gear 3303 and three circumference uniform distributions
3304.Wherein the first gear ring 3301 is fixed on electric four-wheel drive system dynamic assembly shell 3001, first planet carrier 3302 and
The planet carrier 3402 of two planetary gear trains 3400 is integrated, and the first sun gear 3303 is hollow shaft, the third line with center differential
Carrier 3202 is fixedly connected or spline connection, and is pivotally supported on the first output shaft of center differential 3206.Three circles
The first planetary gear 3304 of Zhou Junbu is arranged between the first gear ring 3301 and the first sun gear 3303 and while and the first gear ring
It is engaged with the first sun gear, three 3304 respective center whole empty sets of the first planetary gear are supported in first planet carrier 3402, both
Can be around its own central axis rotation, and can revolve round the sun around 3206 axis of the first output shaft.Second planetary gear train 3400 includes
The second of second gear ring 3401, planet carrier 3402 (i.e. first planet carrier 3302), the second sun gear 3403 and three circumference uniform distributions
Planetary gear 3404.The outside of second gear ring 3401 is fixed with drive bevel gear, and with the first gear of output end of double-rotor machine 3803
Engagement so that the torque of the first output end of double-rotor machine output can be passed to the second planetary gear train 3400, the second sun gear 3403
It is connect with 3206 spline of the first output shaft.Second planetary gear 3404 of three circumference uniform distributions is arranged in the second gear ring 3401 and
It is engaged between two sun gears 3403 and simultaneously with the second gear ring and the second sun gear, three 3304 respective centers of the first planetary gear are complete
Portion's empty set is supported on planet carrier 3402, not only can be around its own central axis rotation, but also can be public around the first output shaft 3206 axis
Turn.
Torque distribution coupling planetary gear train 340 is mainly by fourth planet train 3500 and third planet train between the wheel
3600 are constituted, their planet row characterisitic parameter must be identical, and the type of planet row must be consistent.The fourth planet train
3500 include the fourth line star-wheel of the 4th gear ring 3501, planet carrier 3502, the 4th sun gear 3503 and three circumference uniform distributions
3504.The outside of wherein the 4th gear ring 3501 is fixed with transmission gear, and with the second output gear of double-rotor machine second output terminal
Take turns 3801 external toothings so that the torque of double-rotor machine second output terminal output can be passed to fourth planet train 3500.Planet carrier
3502 (i.e. the second planet carriers 3602) and the second planet carrier 3602 of third planet train 3600 are integrated.4th sun gear 3503
For hollow shaft, it is fixedly connected with the differential casing 3710 of first bevel gear differential assembly 370 or spline is connect, three circumference
Uniformly distributed fourth line star-wheel 3504 be arranged between the 4th gear ring 3501 and the 4th sun gear 3503 and simultaneously and the 4th gear ring and
4th sun gear engages, and three 3504 respective center whole empty sets of fourth line star-wheel are supported on planet carrier 3502, both can be around it
Center axis rotation, and can revolve round the sun around automobile axle axis, 3501 empty set of the 4th gear ring is in the 4th sun gear
In 3503 hollow shaft.The third planet train 3600 includes third gear ring 3601, the second planet carrier 3602, third sun gear
3603 and three circumference uniform distributions the third line star-wheel 3604.Wherein third gear ring 3601 is fixed on electric four-wheel drive system dynamic assembly
On shell 3001, third sun gear 3603 is connect with 3702 spline of the second semiaxis of rear axle.The third line star-wheel of three circumference uniform distributions
3604 are arranged between third gear ring 3601 and third sun gear 3603 and are engaged simultaneously with third gear ring and third sun gear, three
3604 respective center whole empty set of a the third line star-wheel is supported on the second planet carrier 3602, both can be around its own central axis certainly
Turn, and can be around rear axle axis, that is, 3702 axis of the second semiaxis of rear axle revolution.
The first bevel gear differential assembly 370 is mainly by the first semiaxis of rear axle 3701, the second semiaxis of rear axle 3702,
One axle shaft gear 3703, the second axle shaft gear 3704, the first, second cone planetary gear 3705 and the 3706, first planetary gear
Axis 3707, main reduction driven bevel gear 3708, main deceleration drive bevel gear 3709 and differential casing 3710 are constituted.Wherein first
Axle shaft gear 3703 is connect with 3701 spline of the first semiaxis of rear axle, and the first semiaxis of rear axle 3701 is pivotally supported at power assembly
In shell 3001, the second axle shaft gear 3704 is connect with 3702 spline of the second semiaxis of rear axle, and rear axle the second semiaxis 3702 is optional
It is supported on selecting in power assembly shell 3001, differential casing 3710 is pivotally supported at one semiaxis 3701 of rear axle with after
On the second semiaxis of axis 3702.3710 right side of differential casing is fixedly connected with main reduction driven bevel gear 3708, and the master subtracts
Fast driven wheel of differential 3708 is engaged with main deceleration drive bevel gear 3709.First planetary gear shaft 3707 is from differential casing 3710
Center passes through and is rotatably supported on differential casing 3710, and the first, second cone planetary gear 3705 is installed at middle part
With 3706.Two cone planetary gears 3705 and 3706 are arranged symmetrically in differential mechanism center both sides, and respectively be arranged in its left side
3704 external toothing of the first axle shaft gear 3703 and the second axle shaft gear of right both sides.First axle shaft gear 3703 and the second half axle gear
It takes turns 3704 centers to connect with the first semiaxis of rear axle 3701 and the second semiaxis of rear axle 3702 by spline respectively, the first semiaxis of rear axle
3701 and the second semiaxis of rear axle 3702 be pierced by from 3710 both sides centre bore of differential casing and will be moved by constant velocity cardan joint respectively
Power goes out to wheel at left and right sides of rear axle.
The double-rotor machine output unit 380 is mainly by double-rotor machine 3802, second output terminal gear 3801 and
One output end bevel gear 3803 is constituted.Wherein double-rotor machine 3802 is fixed on power assembly shell 3001, needs to illustrate
It is that double-rotor machine 3802 can be any type of double-rotor machine, need to only has there are two independent power output end,
Therefore, change double-rotor machine type do not constitute to the utility model substance innovation.The second of double-rotor machine 3802
Output end is connected with second output terminal gear 3801, can export power outward by second output terminal gear 3801.Double-rotor machine
3802 the first output end is connected with the first output end bevel gear 3803, can outward be exported by the first gear of output end 3803 dynamic
Power.
The full-time electric four-wheel drive System Working Principle of centralization described in the utility model is as follows：
By taking Fig. 1 and the example structure schematic diagram of the full-time electric four-wheel drive system of centralization shown in Fig. 2 as an example, illustrate work original
Reason.
(1) when the full-time electric four-wheel drive system of the centralization is operated in normal straight driving cycle, being distributed without torque needs
When asking, do not start without control signal, double-rotor machine in double-rotor machine 3802, the first output end and second output terminal are not
Output torque, total driving torque that automobile power output unit 310 exports at this time pass through center differential 320, are distributed to automobile
On front axle and rear axle, and respective front axle will be distributed to by the bevel differential component 1002 and 370 on front axle and rear axle
Driving torque and rear axle driving torque are respectively distributed on the driving wheel of antero posterior axis both sides, and the driving that final four wheels obtain turns
Square size is identical.Torque distribution stream is as shown in Figure 3.
At this point, since automobile normal straight travels, four vehicle wheel rotational speeds are essentially identical, therefore center differential second exports
Axis 3205 is identical as center differential 3206 rotating speeds of the first output shaft, and due to the second output shaft 3205 and fifth line star wheel series
One end of 3200 third planet carrier 3202 is fixedly connected or spline connection, the other end of third planet carrier 3202 and and the first row
First sun gear 3303 of star wheel series 3300 is fixedly connected, thus the rotating speed of the first sun gear 3303 with center differential with defeated
The rotating speed of shaft 3206 is identical.Again due to 3206 spline of the second sun gear 3403 and the first output shaft of the second planetary gear train 3400
Connection, therefore, the second sun gear 3403 is identical as the rotating speed of the first output shaft 3206, i.e. the first sun gear 3303 and second sun
It is identical to take turns 3403 rotating speeds.3400 concurrence carrier of first planetary gear train 3300 and the second planetary gear train again, therefore the first gear ring 3301
It is identical as the rotating speed of the second gear ring 3401.Again because the first gear ring 3301 is fixed on power assembly shell 3001, rotating speed 0,
Therefore 3401 rotating speed of the second gear ring is also 0.So 3803 rotating speed of the first output end of double-rotor machine bevel gear is also 0, birotor
First output end of motor 3802 does not rotate.That is the first output end of double-rotor machine 3802 do not start, not output torque.
When driving, vehicle wheel rotational speed is identical at left and right sides of rear axle, the second semiaxis of rear axle 3702 and differential mechanism for automobile normal straight
The rotating speed of shell 3710 is also identical, and due to the 4th sun gear 3503 and differential casing 3710 of fourth planet train 3500
It is fixedly connected or spline connects, therefore the 4th sun gear 3503 is identical as the rotating speed of the second semiaxis of rear axle 3702.Again due to third
The third sun gear 3603 of planetary gear train 3600 is connect with 3702 spline of the second semiaxis of rear axle, and rotating speed is identical, therefore the third sun
Wheel 3603 is identical as the rotating speed of the 4th sun gear 3503.Because of fourth planet train 3500 and 3600 concurrence star of third planet train
Frame, therefore the 4th gear ring 3501 is also identical as the rotating speed of third gear ring 3601.Because third gear ring 3601 is fixed on power assembly
On shell 3001, rotating speed 0, so with the 4th gear ring 3501 of 3801 external toothing of double-rotor machine second output terminal gear
Rotating speed is also 0, therefore 3801 rotating speed of double-rotor machine second output terminal gear is also 0, the second output terminal of double-rotor machine 3802
It does not rotate, birotor second output terminal do not start, not output torque.
(2) when the full-time electric four-wheel drive system of the centralization is operated in operating mode of the driving torque by rear axial front axle distribution when
When, if setting the direction of rotation of wheel when automobile moves forward as positive direction, otherwise be negative direction, the first planetary gear train 3300 with
The planet row characterisitic parameter of second planetary gear train 3400 is all k1.3802 second output terminal of double-rotor machine does not start at this time, double
3,802 first output end output torque of rotor electric machine is T1(T1For positive value), which passes through the first gear of output end 3803 and
After the connected bevel gear engaged transmission of two gear rings 3401, the torque increment inputted into the second gear ring 3401 is i1T1, wherein i1It is
The transmission ratio of 3401 outside bevel gear of one output end bevel gear 3803 and the second gear ring.So the second of the second planetary gear train 3400
The torque increment that sun gear 3403 is inputted into the first output shaft of center differential 3206 isFirst planetary gear train 3300
First sun gear 3303 inputs the torque into 320 planet carrier 3202 of center differential, that is, inputs into center differential second
The torque increment of output shaft 3205 isTherefore, front axle driving torque increasesRear axle driving torque is reduced
In the case that total driving torque remains unchanged, distribution of the driving torque by rear axial front axle is realized, driving torque sendout isTorque distribution stream is as shown in Figure 4.
(3) when the full-time electric four-wheel drive system of the centralization is operated in operating mode when driving torque is distributed from front axle to rear axle
When, it can similarly obtain, 3802 second output terminal of double-rotor machine does not start at this time, and the output of 3,802 first output end of double-rotor machine turns
Square is-T1(T0For positive value), which engages biography by the first output end bevel gear 3803 and the second gear ring 3410 bevel gear that is connected
After dynamic, the torque increment inputted into the second gear ring 3401 is-i1T1.So and the second sun gear 3403 of planetary gear train 3400
The torque increment inputted into the first output shaft of center differential 3206 isFirst sun gear of the first planetary gear train 3300
3303 input the torque into 320 planet carrier 3202 of center differential, that is, input into the second output shaft of center differential 3205
Torque increment beTherefore, front axle driving torque is reducedRear axle driving torque increasesIn total driving torque
In the case of remaining unchanged, distribution of the driving torque from front axle to rear axle is realized, driving torque sendout isTorque point
Flow is as shown in Figure 5.
(4) when the full-time electric four-wheel drive system of the centralization is operated in rear axle driving torque from the second semiaxis of rear axle to rear axle
It is on the contrary for negative direction if set the direction of rotation of wheel when automobile moves forward as positive direction when first semiaxis distributes when operating mode.
If the planet row characterisitic parameter of fourth planet train 3500 and third planet train 3600 is all k2.Double-rotor machine 3802 at this time
First output end does not start, and 3802 second output terminal output torque of double-rotor machine is T2(T2For positive value), which passes through
After two gear of output end 3801 and 3501 outboard gears external toothing of the 4th gear ring transmission, the torque into the 4th gear ring 3501 is inputted
Increment is-i2T2, wherein i2For the transmission ratio of 3501 outboard gears of second output terminal gear 3801 and the 4th gear ring.So the 4th
The torque increment that 4th sun gear 3503 of planetary gear train 3500 is inputted into differential casing 3710 isThird planet train
The torque increment that 3600 third sun gear 3603 is inputted into the second semiaxis of rear axle 3702 isDifferential casing 3710
Again by the torque increment decile of acquisition to the first semiaxis of rear axle 3701 and the second semiaxis of rear axle 3702, therefore final rear axle the first half
Axis 3701 obtain torque increment beThe second semiaxis of rear axle 3702 obtain total torque increment beIt can be seen that the torque of the first semiaxis of rear axle 3701 increasesThe second semiaxis of rear axle
3702 torque is reducedIn the case where total driving torque remains unchanged, driving torque is realized by the second semiaxis of rear axle
3702 distribution to one semiaxis 3701 of rear axle, driving torque sendout areTorque distribution stream is as shown in Figure 6.
(5) when the full-time electric four-wheel drive system of the centralization is operated in rear axle driving torque from the first semiaxis of rear axle to rear axle
When second semiaxis distributes when operating mode, can similarly it obtain, 3,802 first output end of double-rotor machine does not start at this time, double-rotor machine
3802 second output terminal output torques are-T2(T2For positive value), which passes through outside second output terminal gear 3801 and gear ring 3501
Side gear engaged transmission after, input into gear ring 3501 torque increment be i2T2, so the sun gear of fourth planet train 3500
3503 torque increments that input into differential casing 3710 areThe sun gear 3603 of third planet train 3600 inputs
Torque increment into the second semiaxis of rear axle 3702 isDifferential casing 3710 is again by the torque increment decile of acquisition to rear axle
First semiaxis 3701 and the second semiaxis of rear axle 3702, therefore the torque increment that the first semiaxis of final rear axle 3701 obtains isThe second semiaxis of rear axle 3702 obtain total torque increment beIt can be seen that rear axle first
The torque of semiaxis 3701 is reducedThe torque of the second semiaxis of rear axle 3702 increasesIt remains unchanged in total driving torque
In the case of, realize distribution of the driving torque from the first semiaxis of rear axle 3701 to the second semiaxis of rear axle 3702, driving torque distribution
Amount isTorque distribution stream is as shown in Figure 7.
(6) when the full-time electric four-wheel drive system of the centralization is operated in driving torque not only and needs between centers torque distributes but also need to take turns
Under the operating mode of torque distribution, lift for example, driving torque by rear axial front axle distribution and rear shaft torque by the second semiaxis of rear axle backward
Operating mode when the first semiaxis of axis distributes while occurring.If setting the direction of rotation of wheel when automobile moves forward as positive direction, instead
Be negative direction, the planet row characterisitic parameter of the first planetary gear train 3300 and the second planetary gear train 3400 is all k1, fourth planet
The planet row characterisitic parameter of train 3500 and third planet train 3600 is all k2.3,802 first output end of double-rotor machine at this time
Output torque is T1(T1For positive value), 3802 second output terminal output torque of double-rotor machine is T2(T2For positive value).
3,802 first output end output torque of the double-rotor machine is T1(T1For positive value) when, the torque is defeated by first
Outlet bevel gear 3803 and gear ring 3401 are connected after bevel gear engaged transmission, and the torque increment inputted into gear ring 3401 is i1T1,
Wherein i1For the transmission ratio of the first output end bevel gear 3803 and 3401 outside bevel gear of gear ring.So the second planetary gear train 3400
The torque increment that inputs into the first output shaft of center differential 3206 of sun gear 3403 beFirst planetary gear train 3300
Sun gear 3303 input the torque increment into 320 planet carrier 3202 of center differential, that is, input into center differential
The torque increment of two output shafts 3205 isTherefore, front axle driving torque increasesRear axle driving torque is reduced
3802 second output terminal output torque of the double-rotor machine is T2(T2For positive value) when, which passes through second output terminal gear
3801 with the torque increment for after gear ring 3501 outboard gears engaged transmission, inputting into gear ring 3501 be-i2T2, wherein i2It is second
The transmission ratio of gear of output end 3801 and 3501 outboard gears of gear ring.So the sun gear 3503 of fourth planet train 3500 inputs
Torque increment into differential casing 3710 isThe sun gear 3603 of third planet train 3600 is inputted into rear axle second
The torque increment of semiaxis 3702 isDifferential casing 3710 is again by the torque increment decile of acquisition to rear axle the first half
Axis 3701 and the second semiaxis of rear axle 3702, the torque increment that the first semiaxis of rear axle 3701 obtains areThe second semiaxis of rear axle
3702 obtain total torque increment beConsider further that the rear axle torque that shaft rotation is moved forward isTherefore, the torque variable quantity of the first semiaxis of final rear axle 3701 isThe torque of the second semiaxis of rear axle 3702
Variable quantity isIn the case where total driving torque remains unchanged, realize driving torque both by rear axle forward
Axis distribution is distributed from the second semiaxis of rear axle to the first semiaxis of rear axle again.Torque distribution stream is as shown in Figure 8.
By the operation principle of the full-time electric four-wheel drive system of above-mentioned centralization it is found that the electric four-wheel drive system between centers torque distributes
Coupling both torque distribution coupling planetary gear trains between planetary gear train and wheel independently of each other, can realize between centers torque distribution and wheel
The independent control of torque distribution.By controlling the size and Orientation of the second output terminal output torque of double-rotor machine 3802, then
The size and Orientation that torque distributes between automobile hind axle wheel can be controlled.It is defeated by the first output end for controlling double-rotor machine 3802
Go out the size and Orientation of torque, then can control the size and Orientation of automobile between centers torque distribution.Therefore, described in the utility model
Torque fixed direction allocation function electric four-wheel drive system tool there are four types of operating mode, respectively without torque allocation model, between centers turns
Square allocation model, torque allocation model and four-wheel cooperate with torque allocation model between wheel.The no torque allocation model is birotor
The first output end and second output terminal of motor 3802 not output torque, only drive running car by power source 3101.It is described
Between centers torque allocation model is the second output terminal not output torque of double-rotor machine 3802, the first output end output torque, control
The between centers torque of automobile processed distributes.Torque allocation model is that the second output terminal output of double-rotor machine 3802 turns between the wheel
Square, the first output end not output torque, between controlling the rear axle wheel of automobile torque distribute.Four-wheel collaboration torque allocation model is
The first output end and second output terminal of double-rotor machine 3802 export different torques simultaneously, control the between centers torque distribution of automobile
Torque distributes between rear axle wheel.Two output end output torque T of double-rotor machine 38021、T2It can be passed through by entire car controller
Bus sends instruction and determines.It can be according to driver's model selection, vapour as preferably entire car controller (not shown)
The cunning of vehicle operating condition (linear accelerating starting, straight line at the uniform velocity travel, turn at the uniform velocity to travel or turn and give it the gun), antero posterior axis
Turn situation, automobile speed and kinetic parameter (yaw velocity, side slip angle etc.) and double-rotor machine torque capacity ginseng
Number instructs to integrate two output end output torques of determining double-rotor machine 3802.The purpose is to meet driver in various spies
Determine under operating mode for the demand of vehicle different performance, such as dynamic property, economy, turning mobility, control stability or passability,
Or meet above-mentioned vehicle comprehensive performance of the vehicle under common operating mode.
The full-time electric four-wheel drive system of centralization provided by the utility model solves conventional carrier " the not poor torsion of differential "
Drawback, while " torsion of differential difference " function, i.e. differential may be implemented torque may be implemented absolute in the arbitrary number in differential mechanism both sides
It is worth identical increasing, deduction is matched, realization both sides or the output of antero posterior axis unequal power.The essential technique feature, can take into account improvement vehicle
Dynamic property, economy, turning mobility, the demand of control stability and passability, improve vehicle comprehensive performance.
It is not only in the description and the implementation although the embodiments of the present invention have been disclosed as above
Listed utilization, it can be applied to various fields suitable for the present invention completely, for those skilled in the art,
Other modifications may be easily implemented, therefore without departing from the general concept defined in the claims and the equivalent scope, this reality
It is not limited to specific details and legend shown and described herein with novel.
Claims (10)
1. a kind of full-time electric four-wheel drive system of centralization, which is characterized in that including：
Main driving mechanism, power output shaft are engaged with the gear ring of center differential；
Wherein, the sun gear of the center differential and the first output axis connection, the planet carrier of the center differential and second
Axis connection is exported, first output shaft is connect by deceleration mechanism with the shell of first bevel gear differential mechanism, the second output shaft
It is connect with the shell of second bevel gear differential mechanism by deceleration mechanism；
First planetary gear train comprising the first sun gear, the first planetary gear, first planet carrier and the first gear ring；
Second planetary gear train comprising the second sun gear, the second planetary gear and the second gear ring；
Wherein, first sun gear is connect with the planet carrier of the center differential, and empty set is in first output shaft
On, second sun gear with it is described first export axis connection, first planetary gear and the second planetary gear coaxial arrangement described in
In first planet carrier, the second gear ring empty set is on first output shaft；
Third planet train comprising third sun gear, the third line star-wheel, the second planet carrier and third gear ring
Fourth planet train comprising the 4th sun gear, fourth line star-wheel and the 4th gear ring；
Wherein, the second half axis connection, the 4th sun gear and the first bevel gear differential of the third sun gear and rear axle
The shell of device connects, and empty set is in the rear on the second semiaxis of axis, the third line star-wheel and the coaxial arrangement of fourth line star-wheel
On second planet carrier, the first half axis connection of the first axle shaft gear of the first bevel gear differential mechanism and rear axle is described
The second half axis connection of second axle shaft gear of first bevel gear differential mechanism and rear axle；
Double-rotor machine is provided at both ends with the first gear of output end and second output terminal gear, first gear of output end
It is engaged with second gear ring, the second output terminal gear is engaged with the 4th gear ring.
2. the full-time electric four-wheel drive system of centralization as described in claim 1, which is characterized in that the center differential further includes
Fifth line star-wheel, is circumferentially uniformly distributed around the planet carrier of the center differential and center empty set is supported on the central differential
On the planet carrier of device, the two neighboring fifth line star-wheel engages, the fifth line star-wheel inside and the center differential
Sun gear engages, and outside is engaged with the gear ring of the center differential.
3. the full-time electric four-wheel drive system of centralization as described in claim 1, which is characterized in that the first bevel gear differential mechanism
Further include：
First planetary gear shaft passes through first bevel gear differential casing center, and is rotatably supported at described the
On the shell of one bevel differential；
First cone planetary gear is fixedly mounted in first planetary gear shaft, and simultaneously with first half axle gear
Wheel and the second axle shaft gear external toothing；
Second cone planetary gear is fixedly mounted in first planetary gear shaft, and simultaneously with first half axle gear
Wheel and the second axle shaft gear external toothing；
Wherein, first cone planetary gear and second cone planetary gear are symmetrical arranged.
4. the full-time electric four-wheel drive system of centralization as described in claim 1, which is characterized in that the second bevel gear differential mechanism
The first half axis connection of third axle shaft gear and front axle, the 4th axle shaft gear and the front axle second of the second bevel gear differential mechanism
Half axis connection.
5. the full-time electric four-wheel drive system of centralization as claimed in claim 4, which is characterized in that the second bevel gear differential mechanism
Further include：
Second planetary gear shaft passes through second bevel gear differential casing center, and is rotatably supported at described the
On the shell of two bevel differentials；
Third cone planetary gear is fixedly mounted in second planetary gear shaft, and simultaneously with the third half axle gear
Wheel and the 4th axle shaft gear external toothing；
4th cone planetary gear is fixedly mounted in second planetary gear shaft, and simultaneously with the third half axle gear
Wheel and the 4th axle shaft gear external toothing；
Wherein, the third cone planetary gear and the 4th cone planetary gear are symmetrical arranged.
6. the full-time electric four-wheel drive system of centralization as described in claim 1, which is characterized in that first planetary gear and second
Planetary gear is circumferentially uniformly distributed rotating around the first planet carrier and center empty set is supported in the first planet carrier；Adjacent two
A first planetary gear engagement, the first planetary gear inside are engaged with the first sun gear, and outside is engaged with the first gear ring；Phase
Adjacent two the second planetary gear engagements, the second planetary gear inside are engaged with the second sun gear, and outside is nibbled with the second gear ring
It closes.
7. the full-time electric four-wheel drive system of centralization as described in claim 1, which is characterized in that the third line star-wheel and the 4th
Planetary gear is circumferentially uniformly distributed rotating around second planet carrier and center empty set is supported on second planet carrier；Adjacent two
A the third line star-wheel engagement, the third line star-wheel inside are engaged with third sun gear, and outside is engaged with third gear ring；Phase
Adjacent two fourth line star-wheel engagements, the fourth line star-wheel inside are engaged with the 4th sun gear, and outside is nibbled with the 4th gear ring
It closes.
8. the full-time electric four-wheel drive system of centralization as described in claim 1-7 any one, which is characterized in that the main driving
The power output shaft of mechanism is engaged by output gear with the gear ring of the center differential；Described in the first output axis connection
The drive bevel gear of deceleration mechanism, the shell of the first bevel gear differential mechanism connect the driven wheel of differential of the deceleration mechanism,
The drive bevel gear and driven wheel of differential engaged transmission.
9. the full-time electric four-wheel drive system of centralization as described in claim 1-7 any one, which is characterized in that described second is defeated
Shaft is connect by transmission shaft with the second bevel gear differential mechanism, and the both ends of the drive shaft is provided with universal driving device.
10. the full-time electric four-wheel drive system of centralization as described in claim 1-7 any one, which is characterized in that the center
The planet row characterisitic parameter of differential mechanism is 2；The planet row characterisitic parameter of first planetary gear train and the second planetary gear train is identical；
The third planet train is identical with the planet row characterisitic parameter of fourth planet train.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108266512A (en) * | 2018-03-19 | 2018-07-10 | 吉林大学 | A kind of full-time electric four-wheel drive system of centralization |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108266512A (en) * | 2018-03-19 | 2018-07-10 | 吉林大学 | A kind of full-time electric four-wheel drive system of centralization |
| CN108266512B (en) * | 2018-03-19 | 2023-03-28 | 吉林大学 | Centralized full-time electric four-wheel drive system |
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