CN107061678A - A kind of electric differential mechanism with torque fixed direction allocation function - Google Patents
A kind of electric differential mechanism with torque fixed direction allocation function Download PDFInfo
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- CN107061678A CN107061678A CN201710266589.3A CN201710266589A CN107061678A CN 107061678 A CN107061678 A CN 107061678A CN 201710266589 A CN201710266589 A CN 201710266589A CN 107061678 A CN107061678 A CN 107061678A
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- 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
- F16H48/00—Differential gearings
- F16H48/06—Differential gearings with gears having orbital motion
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- 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
- F16H48/00—Differential gearings
- F16H48/38—Constructional details
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Abstract
The invention discloses a kind of electric differential mechanism with torque fixed direction allocation function, including：Main driving mechanism；Bevel differential；TV controls drive mechanism, for output control power；First single epicyclic train, the first planet carrier is fixedly and coaxially connected with the first semiaxis, and the first gear ring is connected with control output end, and the first sun gear is by bearings on the first semiaxis；Second single epicyclic train, the second gear ring is fixed on driving axle housing, and the second sun gear is fixedly connected with the first sun gear；Second sun gear is by bearings on the first semiaxis；3rd single epicyclic train, the 3rd sun gear is fixedly connected with the second planet carrier, and the third line carrier is fixedly connected with the first semiaxis, and the 3rd gear ring is fixedly connected with differential carrier；Wherein, the second single epicyclic train and the first single epicyclic train have same characteristic features parameter.Left and right sides wheel can be assigned to the invention enables the driving torque of automobile according to what the demand for control of control logic was oriented.
Description
Technical field
It is more particularly to a kind of electronic with torque fixed direction allocation function the invention belongs to technical field of electric vehicle transmission
Differential mechanism.
Background technology
Increasingly attention due to energy crisis and to environmental protection, new-energy automobile is that the development of future automobile is reverse, its
Middle electric automobile even more worldwide obtains fast development.Compared to traditional combustion engine automobile, electric automobile has more preferable
Economy and the feature of environmental protection, cause the characteristics of near zero-emission electric automobile that there is significant advantage in terms of environmental protection.Together
When, electric automobile is because the response of motor is fast, low-speed big the features such as there is more preferable acceleration, motor speed,
Torque is easily obtained, and electric automobile more accurately can be controlled.Therefore, electric automobile has great development potentiality.
Power assembly or be made up of motor, speed changer and drive axle that electric automobile is typically constituted using motor and drive axle
Power assembly drive vehicle to travel, the electric automobile of In-wheel motor driving is because unsprung mass is big, wheel hub motor weak heat-dissipating
The shortcomings of do not contain drive axle mostly in scale of mass production, therefore the power assembly of existing electric automobile.
Differential mechanism is the important component in drive axle, due to differential mechanism " differential is not poor to be turned round " principle, the driving torque of automobile
Can only equal distribution in left and right wheelses both sides, just can not be attached using ground well so in the case where road surface attachment is unequal
Put forth effort, or even easily cause in low attachment side the unstable period such as trackslip of wheel, it is impossible to play the adhesive ability of driving wheel.Together
When, the situation that load is transferred to outboard wheels by inboard wheel can occur when being turned due to vehicle high-speed, even in ground attachment
In the case of good, the adhesive ability that will also result in outboard wheels is higher than inboard wheel, and now conventional carrier etc. divides moment of torsion extremely
Interior outboard wheels are then likely to result in inboard wheel and reach that limit of adhesion generation is trackslipped, and make automobile unstability.If by inboard wheel
Partial torque is transferred to outboard wheels, then can increase the side force nargin of inboard wheel, prevents wheel slip, and can be right
Vehicle produces an additional yaw moment, and the torque can help to promote and guide turn inside diameter, improve turn inside diameter machine
Dynamic property and limit cornering ability.At present, the technology is that some high end motions are applied in the form of torque fixed direction allocation differential mechanism
In type car and top grade SUV, such as super four-wheel drive system (SH-AWD) and the super active yaw control system of Mitsubishi of Honda
(SAYC) etc., but the technology but not excessive application on electric automobile.
The content of the invention
Carried present invention aim to address the equal defect that can not be adjusted of differential mechanism or so output torque there is provided one kind
The electric differential mechanism of torque fixed direction allocation function.
The technical scheme that the present invention is provided is：
A kind of electric differential mechanism with torque fixed direction allocation function, including：
Main driving mechanism, it is arranged on differential mechanism side, its output end connected with differential housing, can pass rotary power
It is delivered to differential casing, driving vehicle traveling；
TV controls drive mechanism, and it is arranged on the opposite side of the differential mechanism, for output torque distribution control power；
First single epicyclic train, it includes the first sun gear, the first planetary gear, the first planet carrier and the first tooth
Circle, first planet carrier is fixedly and coaxially connected with the first semiaxis, and first gear ring controls the output end of drive mechanism with TV
Connection, first sun is rotatably supported on the first semiaxis；
Second single epicyclic train, it includes the second sun gear, the second planetary gear, the second planet carrier and the second tooth
Circle, second gear ring is fixed on driving axle housing, and the second sun gear is fixedly connected with the first sun gear；Second sun gear can revolve
What is turned is supported on the first semiaxis；
3rd single epicyclic train, it includes the 3rd sun gear, the third line star-wheel, the third line carrier and the 3rd tooth
Circle, the 3rd sun gear is fixedly connected with the second planet carrier, and the 3rd sun gear is rotatably supported on the first semiaxis, and the 3rd
Planet carrier is fixedly connected with the first semiaxis, and the 3rd gear ring is fixedly connected with differential carrier；
Wherein, the second single epicyclic train and the first single epicyclic train have identical characteristic parameter.
Preferably, the TV controls drive mechanism includes TV controlled motors and TV reducing gears.
Preferably, the TV controlled motors have hollow output shaft, and first semiaxis is rotatably supported at described
Hollow output shaft, and passed from hollow output shaft.
Preferably, the TV reducing gears include：
4th single epicyclic train, it includes the 4th sun gear, fourth line star-wheel, fourth line carrier and the 4th tooth
Circle, the 4th sun gear is fixedly connected with hollow output shaft, and the 4th gear ring is fixed on driving axle housing；
5th single epicyclic train, it includes the 5th sun gear, fifth line star-wheel, fifth line carrier and the 5th tooth
Circle, the 5th sun gear is fixedly connected with fourth line carrier, and the 5th gear ring is fixed on driving axle housing, the fifth line
Carrier is connected as control output end with the first gear ring.
Preferably, the main driving mechanism includes main drive motor and main gear reducer structure.
Preferably, the main drive motor has hollow output shaft, and second semiaxis is rotatably supported at described
Hollow output shaft, and passed from hollow output shaft.
Preferably, the main gear reducer structure includes：
7th single epicyclic train, it includes the 7th sun gear, the 7th planetary gear, the 7th planet carrier and the 7th tooth
Circle, the 7th sun gear is fixedly connected with main drive motor output shaft, and the 7th gear ring is fixed on driving axle housing；
6th single epicyclic train, it includes the 6th sun gear, the 6th planetary gear, the 6th planet carrier and the 6th tooth
Circle, the 6th sun gear is fixedly connected with the 7th planet carrier, and the 6th gear ring is fixed on driving axle housing, the 6th row
Carrier is fixedly connected with differential carrier.
A kind of electric differential mechanism with torque fixed direction allocation function, including：
Main driving mechanism, it is arranged on differential mechanism side, its output end connected with differential housing, can pass rotary power
It is delivered to differential casing, driving vehicle traveling；
TV controls drive mechanism, and it is arranged on the opposite side of the differential mechanism, for output torque distribution control power；
First single double pinions system, it include the first sun gear, the first two-stage planet wheel, the first planet carrier and
First gear ring, first planet carrier is fixedly and coaxially connected with the first semiaxis, and first gear ring controls drive mechanism with TV
Output end is connected, and first sun is rotatably supported on the first semiaxis；
Second single double pinions system, it include the second sun gear, the second row twin-stage star-wheel, the second planet carrier and
Second gear ring, second gear ring is fixed on driving axle housing, and the second sun gear is fixedly connected with the first sun gear；Second sun
Wheel is rotatably supported on the first semiaxis；Second single epicyclic train and the first single epicyclic train have identical special
Levy parameter；
3rd single epicyclic train, it includes the 3rd sun gear, the third line star-wheel, the third line carrier and the 3rd tooth
Circle, the 3rd sun gear is fixedly connected with the second planet carrier, and the 3rd sun gear is rotatably supported on the first semiaxis, and the 3rd
Planet carrier is fixedly connected with the first semiaxis, and the 3rd gear ring is fixedly connected with differential carrier；
Wherein, the second single epicyclic train and the first single epicyclic train have identical characteristic parameter.
A kind of electric differential mechanism with torque fixed direction allocation function, including：
Main driving mechanism, it is arranged on differential mechanism side, its output end connected with differential housing, can pass rotary power
It is delivered to differential casing, driving vehicle traveling；
TV controls drive mechanism, and it is arranged on the opposite side of the differential mechanism, for output torque distribution control power；
First single epicyclic train, it includes the first sun gear, the first planetary gear, the first planet carrier and the first tooth
Circle, first planet carrier is fixedly and coaxially connected with the first semiaxis, and first gear ring controls the output end of drive mechanism with TV
Connection, first sun is rotatably supported on the first semiaxis；
Second single epicyclic train, it includes the second sun gear, the second planetary gear, the second planet carrier and the second tooth
Circle, second gear ring is fixed on driving axle housing, and the second sun gear is fixedly connected with the first sun gear；Second sun gear can revolve
What is turned is supported on the first semiaxis；Second single epicyclic train and the first single epicyclic train have identical feature ginseng
Number；
3rd single double pinions system, it include the 3rd sun gear, the 3rd two-stage planet wheel, the third line carrier and
3rd gear ring, the 3rd sun gear is fixedly connected with the second planet carrier, and the 3rd sun gear is rotatably supported at the first semiaxis
On, the third line carrier is fixedly connected with the first semiaxis, and the 3rd gear ring is fixedly connected with differential carrier；
Wherein, the second single epicyclic train and the first single epicyclic train have identical characteristic parameter.
A kind of electric differential mechanism with torque fixed direction allocation function, including：
Main driving mechanism, it is arranged on differential mechanism side, its output end connected with differential housing, can pass rotary power
It is delivered to differential casing, driving vehicle traveling；
TV controls drive mechanism, and it is arranged on the opposite side of the differential mechanism, for output torque distribution control power；
First single double pinions system, it include the first sun gear, the first two-stage planet wheel, the first planet carrier and
First gear ring, first planet carrier is fixedly and coaxially connected with the first semiaxis, and first gear ring controls drive mechanism with TV
Output end is connected, and first sun is rotatably supported on the first semiaxis；
Second single double pinions system, it include the second sun gear, the second two-stage planet wheel, the second planet carrier and
Second gear ring, second gear ring is fixed on driving axle housing, and the second sun gear is fixedly connected with the first sun gear；Second sun
Wheel is rotatably supported on the first semiaxis；Second single epicyclic train and the first single epicyclic train have identical special
Levy parameter；
3rd single double pinions system, it include the 3rd sun gear, the 3rd two-stage planet wheel, the third line carrier and
3rd gear ring, the 3rd sun gear is fixedly connected with the second planet carrier, and the 3rd sun gear is rotatably supported at the first semiaxis
On, the third line carrier is fixedly connected with the first semiaxis, and the 3rd gear ring is fixedly connected with differential carrier；
Wherein, the second single epicyclic train and the first single epicyclic train have identical characteristic parameter.
Beneficial effects of the present invention are embodied in the following aspects：
1st, the electric differential mechanism with torque fixed direction allocation function that the present invention is provided, solves differential in conventional ADS driving bridge
The drawbacks of device " differential is not poor to be turned round " so that the driving torque of automobile can be according to being assigned to that the demand for control of control logic is oriented
Left and right sides wheel, the work(of left and right sides wheel torque unequal distribution is realized on the premise of the total driving torque in longitudinal direction is not changed
Can, improve the turning mobility and Driving of vehicle.
2nd, the electric differential mechanism with torque fixed direction allocation function that the present invention is provided, TV controlled motors and main drive motor
Coaxially arranged, structure is compacter, reduces arrangement space.
3rd, the electric differential mechanism with torque fixed direction allocation function that the present invention is provided, belongs to sprung mass, therefore will not
Unsprung mass is dramatically increased as wheel hub motor, ride comfort influence is small during on running car.
Brief description of the drawings
Fig. 1 carries the structural representation of torque fixed direction allocation functional electric differential mechanism embodiment one to be of the present invention.
Fig. 2 carries the structural representation of torque fixed direction allocation functional electric differential mechanism embodiment two to be of the present invention.
Fig. 3 carries the structural representation of torque fixed direction allocation functional electric differential mechanism embodiment three to be of the present invention.
Fig. 4 carries torque fixed direction allocation functional electric differential mechanism example IV structural representation to be of the present invention.
Fig. 5 is the torque flow direction of the present invention with torque fixed direction allocation functional electric differential mechanism when automobile is kept straight on
Schematic diagram.
Fig. 6 carries torque of the torque fixed direction allocation functional electric differential mechanism in automobile normal turn to be of the present invention
Flow to schematic diagram.
Fig. 7 turns left and torque orientation to be of the present invention with torque fixed direction allocation functional electric differential mechanism in automobile
Torque when distributor works flows to schematic diagram.
Fig. 8 turns right and torque orientation to be of the present invention with torque fixed direction allocation functional electric differential mechanism in automobile
Torque when distributor works flows to schematic diagram.
Embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings, to make those skilled in the art with reference to specification text
Word can be implemented according to this.
Embodiment one
As shown in figure 1, the invention provides a kind of electric differential mechanism with torque distribution function, mainly being oriented by torque
Distributor 2000, traditional bevel differential 1400, main drive motor reducing gear 1500 and main drive motor 1002 are constituted.
In the present embodiment, the torque fixed direction allocation device 2000 be located at drive axle on the left of (also can and main drive motor
1002 reversing of position, are arranged on the right side of drive axle), mainly by TV controlled motors 1001, TV reducing gears 1100, double-planet
Row TV coupling mechanisms 1200 and single planetary row differential mechanism coupling mechanism 1300 are constituted.
The TV controlled motors 1001 are a cartridge type inner rotor motors, connect the first semiaxis 1402 of left side wheel
Passed from its hollow rotor shafts endoporus, cartridge type internal rotor is connected with the spline of sun gear 1014 of fourth planet train 1010,
The output torque of TV controlled motors 1001 is inputted to fourth planet train 1010.The TV controlled motors 1001 pass through bearing branch
Support is on the first semiaxis 1402, and its stator and its housing are fixed with driving axle housing.
The TV reducing gears 1100 mainly include fourth planet train 1010 and fifth line star wheel series 1020.Described 4th
Planetary gear train 1010 includes sun gear 1014, the planetary gear 1012 of three circumference uniform distributions, planet carrier 1013 and is fixed on driving
Ring gear 1011 on axle housing.Wherein sun gear 1014 is connected with the cartridge type internal rotor spline of TV controlled motors 1001, OK
Carrier 1013 and the sun gear 1024 of fifth line star wheel series 1020 are integrated.The fifth line star wheel series 1020 include sun gear
1024th, the planetary gear 1022 of three circumference uniform distributions, planet carrier 1023 and the ring gear 1021 being fixed on driving axle housing.Wherein
Sun gear 1024 by bearings on the first semiaxis 1402, the ring gear of the planetary gear train 1030 of planet carrier 1023 and first
1031 are integrated.
Preferably TV reducing gears 1100 can by single planetary gear train, multiple rows of planetary gear train or other forms reductor
Structure is constituted, therefore the form of conversion reducing gear 1100 is not regarded as the innovation to the present invention.
The double planet wheel rows of mixing TV coupling mechanisms 1200 mainly include the first planetary gear train 1030 and the second planetary gear train 1040,
Their planet row characteristic parameter must be identical, and the type of planet row must be consistent.First planetary gear train 1030 is included too
Planetary gear 1032, planet carrier 1033 and the ring gear 1031 of sun wheel 1034, three circumference uniform distributions.Wherein ring gear 1031 and the 5th
The planet carrier 1023 of planetary gear train 1020 is integrated, and planet carrier 1033 is connected with the spline of the first semiaxis 1402, sun gear 1034 with
The sun gear 1044 of second planetary gear train 1040 is integrated, and sun gear 1034 is by bearings on the first semiaxis 1402.Institute
The second planetary gear train 1040 is stated including sun gear 1044, the planetary gear 1042 of three circumference uniform distributions, planet carrier 1043 and is fixed on
Ring gear 1041 on driving axle housing.Wherein planet carrier 1043 and the sun gear of third planet train 1,050 1054 is integrated, too
Sun wheel 1044 is by bearings on the first semiaxis 1402.
The single planetary row differential mechanism coupling mechanism 1300 is mainly made up of third planet train 1050.The third planet
Train 1050 includes planetary gear 1052, the planet carrier 1053 of sun gear 1054, three circumference uniform distributions, ring gear 1051.Wherein too
Sun wheel 1054 is integrated with the second planet carrier 1043, and by bearings on the first semiaxis 1402, planet carrier 1053 and the
The spline of one semiaxis 1402 is connected, and ring gear 1051 is integrated with differential carrier 1401.
Traditional bevel differential 1400 it is main by differential carrier 1401, the first semiaxis 1402, the second semiaxis 1403,
First axle shaft gear 1404, the second axle shaft gear 1405, two cone planetary gears 1406 and 1407, the structures of planetary gear shaft 1408
Into.Wherein the first axle shaft gear 1404 is connected with the spline of the first semiaxis 1402, the second axle shaft gear 1405 and the second semiaxis 1403
Spline is connected, and differential carrier 1401 is by bearings on the second semiaxis 1403.
The main drive motor reducing gear 1500 is located at the right side of drive axle, mainly by the 6th planetary gear train 1060 and the
Seven planetary gear trains 1070 are constituted.6th planetary gear train 1060 includes the planetary gear of sun gear 1064, three circumference uniform distributions
1062nd, planet carrier 1063 and the ring gear 1061 being fixed on driving axle housing.Wherein planet carrier 1063 is with differential carrier 1401
One, the planet carrier 1073 of sun gear 1064 and the 7th planetary gear train 1070 is integrated, and sun gear 1064 is existed by bearings
On second semiaxis 1403.The 7th seniority among brothers and sisters star wheel series 1070 include sun gear 1074, the planetary gear 1072 of three circumference uniform distributions,
Planet carrier 1073 and the ring gear 1071 being fixed on driving axle housing.Wherein sun gear 1074 and main drive motor 1002 is hollow
Inner rotor shaft spline is connected.
Preferably main drive motor reducing gear 1500 can be by single planetary gear train, multiple rows of planetary gear train or other forms
Reducing gear constitute, therefore the form of conversion main drive motor reducing gear 1500 is not regarded as the innovation to the present invention.
The main drive motor 1002 is located at the right side of drive axle, and it is a cartridge type inner rotor motor, and connection is right
Second semiaxis 1403 of side wheel is passed from its hollow rotor shafts endoporus.Cartridge type internal rotor and the 7th planetary gear train 1070
The spline of sun gear 1074 is connected, and driving torque can be inputted main drive motor by sun gear 1074 and slowed down by main drive motor 1002
In mechanism 1500, and it is applied on differential carrier 1401, is finally distributed on the first semiaxis 1402 and the second semiaxis 1403.It is described
Main drive motor 1002 is by bearings on the second semiaxis 1403, and its stator and its housing are fixed with driving axle housing.
Embodiment two
As shown in Fig. 2 in the present embodiment, the first planetary gear train 1030 and second in double planet wheel rows of mixing TV coupling mechanisms 1200
Planetary gear train 1040 is the third planet train 1050 in single planetary bevel gear planet row, single planetary row differential mechanism coupling mechanism 1300
For two-stage planet wheel planet row, structure diagram is as shown in the figure.
Embodiment three
As shown in figure 3, in the present embodiment, the first planetary gear train 1030 and second in double planet wheel rows of mixing TV coupling mechanisms 1200
Planetary gear train 1040 is the third planet train in two-stage planet wheel planet row, single planetary row differential mechanism coupling mechanism 1300
1050 be single planetary bevel gear planet row, and structure diagram is as shown in the figure.
Example IV,
As shown in figure 4, in the present embodiment, the first planetary gear train 1030 and second in double planet wheel rows of mixing TV coupling mechanisms 1200
Planetary gear train 1040 is the third planet train in two-stage planet wheel planet row, single planetary row differential mechanism coupling mechanism 1300
1050 be two-stage planet wheel planet row, and structure diagram is as shown in the figure.
Scheme shown in Fig. 1 to Fig. 4 is the electric differential mechanism of the present invention with torque fixed direction allocation function
Achievable example structure scheme, it is contemplated that system inertia loses, running efficiency, the embodiment scheme shown in Fig. 1 is
Optimal preferred scheme, next to that scheme shown in Fig. 3, is scheme shown in Fig. 2 and Fig. 4 again.
Electric differential mechanism operation principle of the present invention with torque fixed direction allocation function is as follows：
By taking the example structure sketch of the electric differential mechanism with torque fixed direction allocation function shown in Fig. 1 as an example, explanation
Operation principle.
When automobile straight-line travelling, left and right sides wheel driving torque is identical, is distributed without torque, therefore TV controlled motors
Without control electric signal in 1001, TV controlled motors are inoperative, and automobile is only driven by main drive motor 1002, main drive motor
The moment of torsion of 1002 outputs is by the moment of torsion increasing action of main drive motor reducing gear 1500 to differential carrier 1401, due to tradition
The principle of the grade of bevel differential mechanism 1400 point moment of torsion, the moment of torsion acted on differential carrier 1401 is distributed to the first semiaxis
1402 and second on semiaxis 1403, drives running car.It is on the contrary if setting the direction of rotation of wheel during Automobile drive as positive direction
For negative direction.Now, differential carrier 1401, the first semiaxis 1402 are identical with the rotary speed of the second semiaxis 1403, third planet
The planetary gear 1052 of train 1050 only revolves round the sun without rotation, therefore, planet carrier 1053 and sun gear 1054 with differential carrier 1401
Constant speed rotation.And the rotation of the planet carrier 1033 due to the first planetary gear train 1030 and the planet carrier 1053 of third planet train 1050
Rotary speed is identical, and the planet carrier 1043 of the second planetary gear train 1040 is integrated with the sun gear 1054 of third planet train 1050,
So the constant speed rotation of planet carrier 1043 in the planetary gear train 1040 of planet carrier 1033 and second in the first planetary gear train 1030.Cause
It is that the first planetary gear train 1030 and the second planetary gear train 1040 are total to sun gear, two planet carrier rotating speeds are also identical, so ring gear
1031 rotating speed is also identical with the rotating speed of ring gear 1041, and ring gear 1041 is fixed, and rotating speed is 0, so the rotating speed of ring gear 1031
Also it is 0.Due to TV reducing gears, 1100 change the torque that TV controlled motors 1001 are exported, and are not changing the moment of torsion of output just
Negative direction, therefore, when automobile is kept straight on, the internal rotor rotating speeds of TV controlled motors 1001 is also inoperative, no for 0, TV controlled motors
Output torque, automobile is only driven by main drive motor 1002, and torque distribution stream is as shown in Figure 5.
When the normal differential of automobile is turned, left and right sides wheel driving torque is identical, is distributed without torque, therefore TV is controlled
Without control electric signal in motor 1001, TV controlled motors are inoperative, and automobile is only driven by main drive motor 1002, main driving electricity
The moment of torsion that machine 1002 is exported is by the moment of torsion increasing action of main drive motor reducing gear 1500 to differential carrier 1401, due to passing
The principle of the bevel differential mechanism 1400 that unites grade point moment of torsion, the moment of torsion acted on differential carrier 1401 is distributed to the first semiaxis
1402 and second on semiaxis 1403, drives running car.
It is on the contrary to be if set the direction of rotation of wheel during Automobile drive as positive direction so that the normal differential of automobile turns left as an example
Negative direction.Then single planetary row differential mechanism coupling mechanism 1050 is obtained by single planetary bevel gear planet row rotating speed formula：
nS5+k5nR5-(k5+1)nPC5=0
N in formulaS5For the rotating speed of 1050 sun gear of third planet train 1054, nR5Turn for the ring gear of third planet train 1051
Speed, nPC5For the planet carrier rotating speed of third planet train 1053, k5For third planet train planet row characteristic parameter.Because automobile is left
Turn, so the rotating speed of differential carrier 1401 is more than the rotating speed of the first semiaxis 1402, so：
nS5＜ nR5
So：
nS5＜ nPC5
The rotating speed of sun gear 1054 i.e. in third planet train 1050 is less than the rotating speed of planet carrier 1053, so for duplicate rows
In star row TV coupling mechanisms 1200, the rotating speed of planet carrier 1033 in the first planetary gear train 1030 is more than in the second planetary gear train 1040
The rotating speed of planet carrier 1043.Again because the first planetary gear train 1030 and the common sun gear of the second planetary gear train 1040, double-planet
Row TV coupling mechanisms 1200 then have：
knR3-(k+1)nPC3=knR4-(k+1)nPC4
N in formulaPC3For the rotating speed of 1030 planet carrier of the first planetary gear train 1033, nR3For the ring gear of the first planetary gear train 1030
1031 rotating speeds, nPC4For the rotating speed of 1040 planet carrier of the second planetary gear train 1043, nR4For 1041 turns of 1040 ring gear of the second planetary gear train
Speed, k is the planet row characteristic parameter of the first planetary gear train 1030 and the second planetary gear train 1040.And because：
nPC3＞ nPC4, and nR4=0
So：
nR3＞ 0
That is the rotating speed of ring gear 1031 of the first planetary gear train 1030 is just, so the internal rotor rotating speed of TV controlled motors 1001
Also for just.Therefore, when the normal differential of automobile turns left, TV controlled motors 1001 are inputted without electric signal, without torque output, TV controls
The cartridge type internal rotor of motor processed is pulled by torque divider 2000 to be rotated with positive direction.Torque distribution stream is as shown in Figure 6.
Similarly can proper automobile normal differential when turning right, TV controlled motors 1001 are inputted without electric signal, without torque output,
The cartridge type internal rotor of TV controlled motors is pulled by torque divider 2000 to be rotated with negative direction.Torque distribution stream is same as schemed
Shown in 6.
When automobile high speed is turned, it is necessary to which inboard wheel torque fixed direction allocation to outboard wheels is motor-driven to improve turning
During property.If setting the direction of rotation of wheel during Automobile drive as positive direction, otherwise it is negative direction, divides so that automobile turns left as an example
Analysis.Now motor controller controls TV controlled motors 1001 export forward torque T0(T0For on the occasion of), the torque passes through TV reductors
Structure 1100, which slows down, to be increased after torsion, and the torque of ring gear 1031 is iT in input double planet wheel rows of mixing TV coupling mechanisms 12000, wherein i is TV
The gearratio of reducing gear 1100.So the torque that planet carrier 1033 inputs the first semiaxis 1402 in the first planetary gear train 1030 isThen TV controlled motors 1001 input the power into the sun gear 1054 in single planetary row differential mechanism coupling mechanism 1300
Square isSo the torque that the planet carrier 1053 in third planet train 1050 inputs the first semiaxis 1402 isThe torque that ring gear 1051 is inputted into differential carrier 1401 isBy differential mechanism
The torque of the decile of shell 1401 to the first semiaxis 1402 and the second semiaxis 1403 isSo final by controlled motor
The torque of 1001 the first semiaxis 1402 of input is that planet carrier 1033 inputs the first semiaxis 1402 in the first planetary gear train 1030
Planet carrier 1053 inputs the torque of the first semiaxis 1402, the decile of differential carrier 1401 to the in torque, third planet train 1050
The part sum of torque three of one semiaxis 1402 is constituted, its result forIt is final by TV controlled motors 1001
The torque for inputting the second semiaxis 1403 isAs above as can be seen that being inputted by TV controlled motors 1001 into first
Torque of the semiaxis 1403 of semiaxis 1402 and second etc. is big reversely, therefore does not change total zigzag tread patterns torque, and with the first semiaxis
1402 connected left side wheel torques are reduced, the right side wheels torque increase being connected with the second semiaxis 1403, can produce one
Contribute to the yaw moment turned left, improve the left-hand bend mobility of automobile.It should be noted that now TV controlled motors 1001
Rotating speed it is identical when turning left with normal differential.Torque distribution stream now is as shown in Figure 7.If it should be noted that TV control electricity
Machine exports negative sense torque at this moment, then orientation is assigned to left side wheel by driving torque by right side wheels, will produce one and prevents
The only yaw moment of vehicle oversteering, for keeping stability of automobile.
It can similarly obtain, when automobile high speed is turned right, the output negative sense of motor controller controls TV controlled motors 1001 turns
Square, a yaw moment for helping to turn right can be produced on the premise of total zigzag tread patterns torque is not changed, vapour is improved
The right-hand bend mobility of car.It should be noted that identical when now the rotating speed of TV controlled motors 1001 is turned right with normal differential.This
When torque distribution stream it is as shown in Figure 8.It should be noted that if TV controlled motors export forward torque at this moment, driving turns
Orientation is assigned to right side wheels by square by left side wheel, is prevented the yaw moment of vehicle oversteering by producing one, is used for
Keep stability of automobile.
Although embodiment of the present invention is disclosed as above, it is not restricted in specification and embodiment listed
With it can be applied to various suitable the field of the invention completely, can be easily for those skilled in the art
Other modification is realized, therefore under the universal limited without departing substantially from claim and equivalency range, the present invention is not limited
In specific details and shown here as the legend with description.
Claims (10)
1. a kind of electric differential mechanism with torque fixed direction allocation function, it is characterised in that including：
Main driving mechanism, it is arranged on differential mechanism side, its output end connected with differential housing, can be delivered to rotary power
Differential casing driving vehicle traveling；
TV controls drive mechanism, and it is arranged on the opposite side of the differential mechanism, for output torque distribution control power；
First single epicyclic train, it includes the first sun gear, the first planetary gear, the first planet carrier and the first gear ring, institute
State the first planet carrier to be fixedly and coaxially connected with the first semiaxis, first gear ring controls the output end of drive mechanism to be connected with TV,
First sun is rotatably supported on the first semiaxis；
Second single epicyclic train, it includes the second sun gear, the second planetary gear, the second planet carrier and the second gear ring, institute
State the second gear ring to be fixed on driving axle housing, the second sun gear is fixedly connected with the first sun gear；Second sun gear is rotatable
It is supported on the first semiaxis；
3rd single epicyclic train, it includes the 3rd sun gear, the third line star-wheel, the third line carrier and the 3rd gear ring, institute
State the 3rd sun gear to be fixedly connected with the second planet carrier, the 3rd sun gear is rotatably supported on the first semiaxis, third planet
Frame is fixedly connected with the first semiaxis, and the 3rd gear ring is fixedly connected with differential carrier；
Wherein, the second single epicyclic train and the first single epicyclic train have identical characteristic parameter.
2. the electric differential mechanism according to claim 1 with torque fixed direction allocation function, it is characterised in that the TV controls
Drive mechanism processed includes TV controlled motors and TV reducing gears.
3. the electric differential mechanism according to claim 2 with torque fixed direction allocation function, it is characterised in that the TV controls
Motor processed has a hollow output shaft, and first semiaxis is rotatably supported at the hollow output shaft, and from hollow output
Passed in axle.
4. the electric differential mechanism according to claim 2 with torque fixed direction allocation function, it is characterised in that the TV subtracts
Fast mechanism includes：
4th single epicyclic train, it includes the 4th sun gear, fourth line star-wheel, fourth line carrier and the 4th gear ring, institute
State the 4th sun gear to be fixedly connected with hollow output shaft, the 4th gear ring is fixed on driving axle housing；
5th single epicyclic train, it includes the 5th sun gear, fifth line star-wheel, fifth line carrier and the 5th gear ring, institute
State the 5th sun gear to be fixedly connected with fourth line carrier, the 5th gear ring is fixed on driving axle housing, the fifth line carrier
It is connected as control output end with the first gear ring.
5. the electric differential mechanism according to claim 1 with torque fixed direction allocation function, it is characterised in that the main drive
Motivation structure includes main drive motor and main gear reducer structure.
6. the electric differential mechanism according to claim 5 with torque fixed direction allocation function, it is characterised in that the main drive
Dynamic motor has a hollow output shaft, and second semiaxis is rotatably supported at the hollow output shaft, and from hollow output
Passed in axle.
7. the electric differential mechanism according to claim 5 with torque fixed direction allocation function, it is characterised in that the master subtracts
Fast mechanism includes：
7th single epicyclic train, it includes the 7th sun gear, the 7th planetary gear, the 7th planet carrier and the 7th gear ring, institute
State the 7th sun gear to be fixedly connected with main drive motor output shaft, the 7th gear ring is fixed on driving axle housing；
6th single epicyclic train, it includes the 6th sun gear, the 6th planetary gear, the 6th planet carrier and the 6th gear ring, institute
State the 6th sun gear to be fixedly connected with the 7th planet carrier, the 6th gear ring is fixed on driving axle housing, the 6th planet carrier
It is fixedly connected with differential carrier.
8. a kind of electric differential mechanism with torque fixed direction allocation function, it is characterised in that including：
Main driving mechanism, it is arranged on differential mechanism side, its output end connected with differential housing, can be delivered to rotary power
Differential casing, driving vehicle traveling；
TV controls drive mechanism, and it is arranged on the opposite side of the differential mechanism, for output torque distribution control power；
First single double pinions system, it includes the first sun gear, the first two-stage planet wheel, the first planet carrier and first
Gear ring, first planet carrier is fixedly and coaxially connected with the first semiaxis, and first gear ring controls the output of drive mechanism with TV
End connection, first sun is rotatably supported on the first semiaxis；
Second single double pinions system, it includes the second sun gear, the second row twin-stage star-wheel, the second planet carrier and second
Gear ring, second gear ring is fixed on driving axle housing, and the second sun gear is fixedly connected with the first sun gear；Second sun gear can
What is rotated is supported on the first semiaxis；
3rd single epicyclic train, it includes the 3rd sun gear, the third line star-wheel, the third line carrier and the 3rd gear ring, institute
State the 3rd sun gear to be fixedly connected with the second planet carrier, the 3rd sun gear is rotatably supported on the first semiaxis, third planet
Frame is fixedly connected with the first semiaxis, and the 3rd gear ring is fixedly connected with differential carrier；
Wherein, the second single epicyclic train and the first single epicyclic train have identical characteristic parameter.
9. a kind of electric differential mechanism with torque fixed direction allocation function, it is characterised in that including：
Main driving mechanism, it is arranged on differential mechanism side, its output end connected with differential housing, can be delivered to rotary power
Differential casing, driving vehicle traveling；
TV controls drive mechanism, and it is arranged on the opposite side of the differential mechanism, for output torque distribution control power；
First single epicyclic train, it includes the first sun gear, the first planetary gear, the first planet carrier and the first gear ring, institute
State the first planet carrier to be fixedly and coaxially connected with the first semiaxis, first gear ring controls the output end of drive mechanism to be connected with TV,
First sun is rotatably supported on the first semiaxis；
Second single epicyclic train, it includes the second sun gear, the second planetary gear, the second planet carrier and the second gear ring, institute
State the second gear ring to be fixed on driving axle housing, the second sun gear is fixedly connected with the first sun gear；Second sun gear is rotatable
It is supported on the first semiaxis；
3rd single double pinions system, it includes the 3rd sun gear, the 3rd two-stage planet wheel, the third line carrier and the 3rd
Gear ring, the 3rd sun gear is fixedly connected with the second planet carrier, and the 3rd sun gear is rotatably supported on the first semiaxis, the
Three planet carriers are fixedly connected with the first semiaxis, and the 3rd gear ring is fixedly connected with differential carrier；
Wherein, the second single epicyclic train and the first single epicyclic train have identical characteristic parameter.
10. a kind of electric differential mechanism with torque fixed direction allocation function, it is characterised in that including：
Main driving mechanism, it is arranged on differential mechanism side, its output end connected with differential housing, can be delivered to rotary power
Differential casing, driving vehicle traveling；
TV controls drive mechanism, and it is arranged on the opposite side of the differential mechanism, for output torque distribution control power；
First single double pinions system, it includes the first sun gear, the first two-stage planet wheel, the first planet carrier and first
Gear ring, first planet carrier is fixedly and coaxially connected with the first semiaxis, and first gear ring controls the output of drive mechanism with TV
End connection, first sun is rotatably supported on the first semiaxis；
Second single double pinions system, it includes the second sun gear, the second two-stage planet wheel, the second planet carrier and second
Gear ring, second gear ring is fixed on driving axle housing, and the second sun gear is fixedly connected with the first sun gear；Second sun gear can
What is rotated is supported on the first semiaxis；
3rd single double pinions system, it includes the 3rd sun gear, the 3rd two-stage planet wheel, the third line carrier and the 3rd
Gear ring, the 3rd sun gear is fixedly connected with the second planet carrier, and the 3rd sun gear is rotatably supported on the first semiaxis, the
Three planet carriers are fixedly connected with the first semiaxis, and the 3rd gear ring is fixedly connected with differential carrier；
Wherein, the second single epicyclic train and the first single epicyclic train have identical characteristic parameter.
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| CN201710266589.3A CN107061678B (en) | 2017-04-21 | 2017-04-21 | Electric differential mechanism with torque directional distribution function |
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| CN201710266589.3A CN107061678B (en) | 2017-04-21 | 2017-04-21 | Electric differential mechanism with torque directional distribution function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114643803A (en) * | 2020-12-17 | 2022-06-21 | 丰田自动车株式会社 | Variable-speed drive axle for electric automobile |
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| DE102009017448A1 (en) * | 2008-04-18 | 2009-11-05 | GM Global Technology Operations, Inc., Detroit | Transaxle for power train of front wheel drive vehicle, has clutches and brakes that are selectively engaged to establish eight forward speed ratios and one reverse speed ratio between input shaft and output shaft |
| US20100234161A1 (en) * | 2009-03-12 | 2010-09-16 | Tomo Kato | Drive force adjustment apparatus |
| CN104675951A (en) * | 2015-02-11 | 2015-06-03 | 吉林大学 | Electric differential with double-row planetary gear torque directional distribution mechanism |
| CN206682247U (en) * | 2017-04-21 | 2017-11-28 | 吉林大学 | A kind of electric differential mechanism with torque fixed direction allocation function |
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| JP2006327583A (en) * | 2006-06-15 | 2006-12-07 | Toyota Motor Corp | Drive device for vehicle |
| DE102009017448A1 (en) * | 2008-04-18 | 2009-11-05 | GM Global Technology Operations, Inc., Detroit | Transaxle for power train of front wheel drive vehicle, has clutches and brakes that are selectively engaged to establish eight forward speed ratios and one reverse speed ratio between input shaft and output shaft |
| US20100234161A1 (en) * | 2009-03-12 | 2010-09-16 | Tomo Kato | Drive force adjustment apparatus |
| CN104675951A (en) * | 2015-02-11 | 2015-06-03 | 吉林大学 | Electric differential with double-row planetary gear torque directional distribution mechanism |
| US20170023114A1 (en) * | 2015-02-11 | 2017-01-26 | Jilin University, China | Drive axle of electric distribution torque |
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| CN114643803A (en) * | 2020-12-17 | 2022-06-21 | 丰田自动车株式会社 | Variable-speed drive axle for electric automobile |
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