CN109780146A - Two gears automatic speed changer for machine for electric vehicle - Google Patents
Two gears automatic speed changer for machine for electric vehicle Download PDFInfo
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- CN109780146A CN109780146A CN201910189812.8A CN201910189812A CN109780146A CN 109780146 A CN109780146 A CN 109780146A CN 201910189812 A CN201910189812 A CN 201910189812A CN 109780146 A CN109780146 A CN 109780146A
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- speed changer
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Abstract
The present invention relates to car transmissions fields, specifically disclose two gears automatic speed changer for machine for electric vehicle, including shell, input shaft and output shaft, it include double double pinions group, the first brake and second brake in shell, double double pinions group includes front-seat planetary gear set and heel row planetary gear set, heel row planetary gear and front-seat planetary gear are connect with planet carrier, and heel row planetary gear is engaged with front-seat planetary gear, and heel row planetary gear is engaged with heel row sun gear；For first brake for braking to planet carrier, input shaft drives the rotation of heel row sun gear；For second brake for braking to front-seat planetary gear set, front-seat planetary gear set drives output shaft rotation.This programme passes through the cooperation of the first brake, second brake and double double pinions group, solves the problems, such as to be short of power when climbing or the low rate start that electric car occurs in the prior art and the shift performance difference of speed changer appearance and the poor expandability of speed changer.
Description
Technical field
The present invention relates to car transmissions field, two gears automatic speed changer for machine specifically for electric vehicle.
Background technique
As increasingly exhaustion, the automobile of fuel resource are also gradually switching to electric car from fuel-engined vehicle, in the prior art
Since driving motor has slow-speed of revolution permanent torque, high revolving speed invariable power and the characteristics such as working range is wide, numerous domestic host
Factory develops the electric car of fixed speed ratio on the basis of orthodox car, its performance of the electric car of fixed speed ratio can substantially expire
Sufficient driving requirements.But in fact, due to the complexity of road conditions, the electric car of fixed drive ratio in low rate start or climbing,
Under the output mode for cooperating the slow-speed of revolution permanent torque of motor, because the constant torque and automobile of motor are fixed drive ratio, so that defeated
Torque out is non-adjustable, the nonadjustable output torque make automobile occur being short of power when driving on precipitous slope it is (i.e. defeated
Torque is insufficient out) the case where, on the one hand, electric car output power is insufficient, causes electric car climbing or low rate start difficult；
On the other hand, in climbing, as the motor feels hot, power consumption is fast, the course continuation mileage in turn resulting in electric car shortens
The problem of.If using the big driving motor of torque output instead to increase torque, driving motor is with high costs, and can make electronic vapour
Vehicle cost performance reduces.
Currently, torque insufficient scheme when having had solution climbing or low rate start in the prior art, such as Publication No.
The Chinese invention patent of CN105020349A discloses " a kind of two gears automatic speed changer for machine for electric vehicle ", the invention packet
Synchronizer 6 and bottom gear gear set 7 and top gear gear set 4 (see attached drawing 1) positioned at 6 the right and left of synchronizer are included, by same
Step device 6 transmits on the biggish output shaft 5 of torque, institute to select top gear or low or first gear because the synchronizer of this structure 6 is located at
It is higher with the intensity requirement to synchronizer 6, it is unfavorable for lightweight and extends the service life of speed changer, and performance of shifting gears is bad；
In addition, the output driven wheel of bottom gear gear set 7 and top gear gear set 4 is respectively positioned on the end of output shaft 5, so that output shaft two
When identical bearing is selected at end, the stress of bearings at both ends is not identical always, thus the service life of bearing will substantially reduce；In addition,
If to increase transmission ratio according to the actual demand of electric car, the volume of the gear set of external toothing can be bigger, existing shell
Body is unable to satisfy requirement, must redesign shell with meet demand, thus applicable situation is relatively narrow, the scalability of speed changer
Difference.
Summary of the invention
The invention is intended to provide two gears automatic speed changer for machine for electric vehicle, to solve fixed drive ratio in the prior art
The climbing that occurs of electric car or the shift that occurs of the problem of being short of power when low rate start, two grades of automatic speed changer for machine
The problem of poor expandability of shaft strength unevenness and speed changer in energy difference and output shaft.
In order to achieve the above object, base case of the invention is as follows:
Two gears automatic speed changer for machine for electric vehicle, input shaft and output including shell and for power transmitting
Axis, the interior shell includes double double pinions group, the first brake and second brake, the double double-pinion planetary tooth
Wheel group includes front-seat planetary gear set and heel row planetary gear set, and the front row planetary gear set includes front-seat sun gear, front row
Planetary gear and gear ring, the heel row planetary gear set include heel row sun gear, heel row planetary gear and planet carrier, the rear rows of planetary
Wheel and front-seat planetary gear connects with planet carrier, and the heel row planetary gear is engaged with front row planetary gear, the heel row planetary gear and
The engagement of heel row sun gear；For first brake for braking to planet carrier, the input shaft drives heel row sun rotation
It is dynamic；For the second brake for braking to front-seat planetary gear set, the front row planetary gear set drives output shaft to turn
It is dynamic.
The working principle of this programme: it when neutral gear, controls the first brake and second brake is detached from (i.e. not braking), make
Obtaining double double pinions group does not have braking member, and then the transmission ratio of double double pinions group is 0, thus by front row
The output shaft also unpowered output that planetary gear set drives, so electric car is in neutral position state.At one grade, the first system of control
Dynamic device engagement (i.e. braking planet carrier), second brake is detached from, and double double pinions group passes the power of input shaft
It passs, output shaft is imparted power to by front-seat planetary gear set.At two grades, the first brake of control is detached from, second brake
Engagement, relative to one grade, changes the braking member of double double pinions group, thus the transmission of double double pinions
Than changing, so that also being changed by the power that front-seat planetary gear set passes to output shaft, so that electronic
Automobile increases a gear again.
Compared with the prior art the utility model has the advantages that
First, by the cooperation of the first brake and second brake and twin-stage two-row planetary gear group, realize to electronic
Two grades of automobile adjustment, so that the distribution of two gear transmission ratios is more flexible, fixed drive ratio compared with the prior art
Electric car, two grades of retarders adapt to demand of the automobile to torque under different road conditions, reduce that the motor feels hot, power consumption is fast
The case where occur, achieved the purpose that extend electric car course continuation mileage, while having also improved the cost performance of electric car.
Second, this programme can also change the mode of input and output according to specific occasion, realize the adjusting of transmission ratio to meet
The demand of different occasions, it is hereby achieved that biggish gear range, applicability is wide, is conducive to promote；In addition, double using twin-stage
Rows of planetary gear set, when carrying out the Transform Type design of product, without adjusting the center of gear away from without carrying out big repair to shell
Change, inheritability is good, favorable expandability, and then reduces product cost and development cycle.
Third, this programme are combined by changing the state (engaging or disengaging) of the first brake and second brake
Reach electric car for one grade and two grades of demand, middle two grades of automatic speed changer for machine of use is electronic compared with the prior art
Automobile, on the one hand, the first brake and second brake do not act on output shaft, thus for the first brake and
The intensity requirement of two brakes is relatively low；On the other hand, because no matter all elements of double double pinions group are at which
It is in meshing state under gear, so the power of automobile improves the dynamic of automobile without interrupting during electric automobile gearshift
Power, while it is steady to shift gears, and efficiently avoids impact of the automobile in shift process, shift performance is good, is conducive to speed changer
Furthermore life-time dilatation also improves the comfort of electric car.
4th, the variation of electric car gear is controlled in this programme by the first brake and second brake, compared to
The electric car of two grades of automatic speed changer for machine in the prior art, the first brake and second brake of the application not with
The switching for the connection type that output shaft, which exists, to be directly connected to, and be not present under different stalls on output shaft, thus output shaft both ends
Shaft strength identical, opposite service life for improving bearing.
It further, further include first gear group in the shell, the first gear group includes the first driving gear and the
One driven gear, first driving gear are driven by front-seat planetary gear set, and first driven gear is fixed with output shaft
Connection.
Be conducive to increase transmission ratio the utility model has the advantages that increasing first gear group, and the first driving gear set combines double twin-stage
Planetary gear set uses, and in the case where intermeshing between the element for not influencing double double pinions group, can transmit
Torque it is bigger so that being more widely applied.
Further, the second brake is for braking front-seat sun gear, the gear ring and the fixed company of the first driving gear
It connects.
The utility model has the advantages that when front-seat sun gear braking, output of the gear ring as double double pinions group, according to planet tooth
The transmission principle of train, transmission ratio at this time is small, and the torque of output is small, and revolving speed is relatively higher, is conducive to the high speed of electric car
To the demand of low torque high speed under traveling.
Further, the heel row sun gear is fixedly connected with input shaft.
The utility model has the advantages that input shaft directly transmits torque to heel row sun gear, reduce the energy during torque transfer
Loss.
Further, the second brake is for braking gear ring, the front row sun gear and the fixed company of the first driving gear
It connects, further includes second gear group in the shell, the second gear group includes the second driving gear and the second driven gear, institute
It states the second driving gear to be fixedly connected with input shaft, second driven gear is fixedly connected with heel row sun gear.
The utility model has the advantages that being used to brake gear ring for second brake, front-seat sun gear is as double double pinions group
Output brakes the scheme transmission ratio having the same when front-seat sun gear to reach, so increasing by the second tooth with second brake
Wheel group to meet the requirement of transmission ratio, and then achievees the purpose that different structure is able to achieve high torque (HT) required for automobile.
Further, the driving motor for driving input shaft to rotate is fixedly connected on the input shaft.
Input power is provided for input shaft the utility model has the advantages that directlying adopt driving motor in the prior art, is not needed again
Design, saves design and experimental cost.
Further, the gear ratio section of the gear ring and heel row sun gear is (2.5,3.5), the gear ring and the front-seat sun
The gear ratio section of wheel is [1.5,2.5].
The utility model has the advantages that selecting by the gear ratio section to the element in double double pinions group, reach electricity
Transmission ratio required for electrical automobile.
Further, the gear ratio section of the first driven gear and the first driving gear of the first gear group is [3,4].
The utility model has the advantages that second brake for brake front-seat sun gear when, for make this programme for electric vehicle two
The volume size for keeping off automatic speed changer for machine can be on existing automobile, and then by double double pinions group and the
The selection of the gear ratio of one gear set, so that the absolute value of transmission ratio of the two gears automatic speed changer for machine for electric vehicle at one grade
Range is (7,14), and the absolute value range of the transmission ratio at two grades is (4,7), by changing two sun gears and the gear ring number of teeth
Mode, can with the distribution of two gear transmission ratios of flexible design, meet it is for electric vehicle two gear automatic speed changer for machine big
Ratio demand in range.
Further, the gear ratio section of the second driven gear and the second driving gear of the second gear group is [2,3].
The utility model has the advantages that when second brake is used to brake gear ring, by double double pinions group, first gear
The selection of gear ratio in group and second gear group, so that two gear automatic speed changer for machine for electric vehicle is in one grade of transmission ratio
Absolute value range can still reach (7,14), and the absolute value range of the transmission ratio at two grades reaches (4,7).
Detailed description of the invention
Fig. 1 is the structural schematic diagram of two gears automatic speed changer for machine for electric vehicle in the prior art；
Fig. 2 is the structural schematic diagram of the embodiment of the present invention one；
Fig. 3 is the structural schematic diagram of the embodiment of the present invention two.
Specific embodiment
It is further described below by specific embodiment:
Appended drawing reference in Figure of description includes: driving motor 1, shell 2, input shaft 3, output shaft 4, the first brake
5, second brake 6, first gear group 7, front-seat planetary gear set 8, heel row planetary gear set 9, front-seat sun gear 10, preceding seniority among brothers and sisters
Star-wheel 11, gear ring 12, heel row sun gear 13, heel row planetary gear 14, planet carrier 15, the first driving gear 16, the first driven gear
17, second gear group 18, the second driving gear 19, the second driven gear 20.
Embodiment one
Embodiment one is basic as shown in Fig. 2, for electric vehicle two keep off automatic speed changer for machine, including driving motor 1, shell
2 and for power transmitting input shaft 3 and output shaft 4, include double double pinions group, the first brake in shell 2
5, second brake 6 and first gear group 7；Double double pinions group includes front-seat planetary gear set 8 and rear rows of planetary tooth
The motor shaft of wheel group 9, driving motor 1 is connect with input shaft 3 by spline, and the wheel of output shaft 4 and electric car passes through shaft coupling
Device connection.
Front-seat planetary gear set 8 includes front-seat sun gear 10, front-seat planetary gear 11 and gear ring 12, heel row planetary gear set 9
Including heel row sun gear 13, heel row planetary gear 14 and planet carrier 15, heel row planetary gear 14 and front-seat planetary gear 11 are and planet carrier
15 connections, heel row planetary gear 14 are engaged with front-seat planetary gear 11, and heel row planetary gear 14 is engaged with heel row sun gear 13, the heel row sun
Wheel 13 is fixedly connected with input shaft 3；First brake 5 is for braking planet carrier 15, before second brake 6 is for braking
Arrange sun gear 10.
First gear group 7 includes the first driving gear 16 and the first driven gear 17, the first driving gear 16 and gear ring 12
It is fixedly connected, the first driven gear 17 is fixedly connected with output shaft 4.
Wherein, the gear ratio of gear ring 12 and heel row sun gear 13 is 3, and the gear ratio of gear ring 12 and front-seat sun gear 10 is 2,
First driven gear 17 of first gear group 7 and the gear ratio of the first driving gear 16 are 3.5.
Specific work process is as follows:
When neutral gear, the first brake 5 is controlled by the control unit of electric car and second brake 6 is detached from (i.e. not
Braking) so that double double pinions group does not have braking member, and then the transmission ratio of double double pinions group is 0, tooth
Circle 12 is without output, and also unpowered output, electric car are in neutral position state to output shaft 4.
At one grade, the engagement of the first brake 5 is controlled by the control unit of electric car, planet carrier 15 is braked, the second system
Dynamic device 6 is detached from；The power that driving motor 1 exports at this time successively passes through input shaft 3, heel row sun gear 13, heel row planetary gear 14, preceding
Seniority among brothers and sisters star-wheel 11, gear ring 12 are transferred to first gear group 7, are finally passed power by the first driven gear 17 of first gear group 7
It is handed to output shaft 4, for output shaft 4 by shaft coupling by the torque transfer to automobile tire of output, transmission ratio at one grade is as follows
More larger than absolute value in the gear underdrive shown in table 1, the torque of electric car output is bigger, convenient for the climbing of electric car
Or low rate start.
At two grades, the first brake 5 being controlled by the control unit of electric car and is detached from, planet carrier 15 is not braking, and second
Brake 6 engages, and front-seat sun gear 10 is braked；The transmission path for the power that driving motor 1 exports at this time is identical as one grade；It is different
, stress condition of the front-seat sun gear 10 under two gears is different, and at one grade, the front-seat rotation of sun gear 10 but do not transmit turns
Square；At two grades, front-seat sun gear 10 is braked, so front-seat 10 stress of sun gear does not rotate still；Also just because of front-seat sun gear
10 stress and the difference of institute's torque suspension situation, cause the transmission ratio of double double pinions group under different stalls not
Together.
Transmission ratio at two grades is as shown in table 1 below, and very much, electricity is reduced when the gear underdrive is one grade more opposite than absolute value
The torque of electrical automobile output is relatively much smaller, convenient for the demand under the running at high speed of electric car to low torque.
The calculation of transmission ratio is as follows in the present embodiment one:
iAlways=iRow*i1, wherein iAlwaysFor the resultant gear ratio of two gear automatic speed changer for machine, iRowFor double double pinions group
Transmission ratio, i1For the transmission ratio of first gear group.
Because the input element of double double pinions group is heel row sun gear 13, output element is gear ring 12, so double
Arrange the transmission ratio i of double pinions groupRowAre as follows: iRow=n13/n12。
Rotation speed relation in double double pinions group between element meets following equation of motion:
The equation of motion of front-seat planetary gear set are as follows: n10+α1n12-(1+α1)n15=0, wherein α1=Z12/Z10=2；
The equation of motion of heel row planetary gear set are as follows: n13-α2n12-(1-α2)n15=0, wherein α2=Z12/Z13=3；
Wherein, wherein n10For the revolving speed of front-seat sun gear 10, n12For the revolving speed of gear ring 12, n13For heel row sun gear 13
Revolving speed, n15For the revolving speed of planet carrier 15, Z10For the number of teeth of front-seat sun gear 10, Z12For the number of teeth of gear ring 12, Z13For the heel row sun
The number of teeth of wheel 13.
It can be by the transmission ratio i of double double pinions group according to connection equationRowIt calculates.
The transmission ratio i of first gear group1Calculation is as follows:
i1=n16/n17=-Z17/Z16, work as n16And n17When not being 0, i1=n16/n17=-Z17/Z16=-3.5.
Wherein n16For the revolving speed of the first driving gear 16, n17For the revolving speed of the first driven gear 17, Z16For the first driving tooth
The number of teeth of wheel 16, Z17For the number of teeth of the first driven gear 17.
When neutral gear, i1=0, iRow=0.
At one grade, n15=0；iRow=α2=3, i1=n16/n17=-Z17/Z16=-3.5.
When second gear, n10=0, two formulas of joint obtain: iRow=(α1+α2)/(1+α1)=1.67；i1=-3.5.
Embodiment one for electric vehicle two keeps off the transmission such as table 1 under automatic speed changer for machine different stalls.
Table 1
| Content | The transmission ratio i of double double pinions groupRow | The transmission ratio i of first gear group1 | Resultant gear ratio iAlways |
| Neutral gear | 0 | 0 | 0 |
| One grade | 3 | -3.5 | -10.5 |
| Two grades | 1.67 | -3.5 | -5.85 |
Embodiment two
Embodiment two is basic as shown in figure 3, the difference of embodiment two and embodiment one has at two, at first, changes second
The element that brake 6 is braked, second brake 6 is for braking gear ring 12 in embodiment two, double double pinions
The output of group is front-seat sun gear 10；At second, increase second gear group 18 in example 2, second gear group 18 is located at shell
In body 2, second gear group 18 includes the second driving gear 19 and the second driven gear 20, the second driving gear 19 and input shaft 3
It is fixedly connected, the second driven gear 20 is fixedly connected with heel row sun gear 13.
Wherein the gear ratio of the second driven gear 20 and the second driving gear 19 of second gear group 18 is 2.5.
Specific work process:
When neutral gear, the first brake 5 is controlled by the control unit of electric car and second brake 6 is detached from (i.e. not
Braking) so that double double pinions group does not have braking member, and then the transmission ratio of double double pinions group is 0, because
And 13 unpowered output of heel row sun gear, also unpowered output, electric car are in neutral position state to output shaft 4.
At one grade, the engagement of the first brake 5 is controlled by the control unit of electric car, planet carrier 15 is braked, the second system
Dynamic device 6 is detached from；The power that driving motor 1 exports at this time successively passes through input shaft 3, the second driving gear 19, the second driven gear
20, heel row sun gear 13, heel row planetary gear 14, front-seat planetary gear 11, front-seat sun gear 10 are transferred to first gear group 7, finally
Power is transferred to output shaft 4 by the first driven gear 17 of first gear group 7, output shaft 4 is turned output by shaft coupling
Square is transferred on automobile tire, and transmission ratio at one grade is as shown in table 2 below, more larger than absolute value in the gear underdrive, electronic
The torque of automobile output is bigger, climbing or low rate start convenient for electric car.
At two grades, the first brake 5 being controlled by the control unit of electric car and is detached from, planet carrier 15 is not braking, and second
Brake 6 engages, and gear ring 12 is braked；The transmission path for the power that driving motor 1 exports at this time is identical as one grade；Unlike,
Stress condition of the gear ring 12 under two gears is different, and at one grade, gear ring 12 rotates but do not transmit torque；At two grades, gear ring 12
Braking, so 12 stress of gear ring does not rotate still；Also just because of the difference of the stress of gear ring 12 and institute's torque suspension situation, causes
The difference of the transmission ratio of double double pinions group under different stalls.
Transmission ratio at two grades is as shown in table 2 below, and very much, electricity is reduced when the gear underdrive is one grade more opposite than absolute value
The torque of electrical automobile output is relatively much smaller, convenient for the demand under the running at high speed of electric car to low torque.
The calculation of transmission ratio is as follows in the present embodiment two:
iAlways=i2*iRow*i1, wherein iAlwaysFor the resultant gear ratio of two gear automatic speed changer for machine, i2For the transmission of second gear group
Than iRowFor the transmission ratio of double double pinions group, i1For the transmission ratio of first gear group, the wherein transmission of first gear group
Compare i1Calculation method it is identical as in embodiment one.
The transmission ratio i of second gear group2Calculation is as follows:
i2=n19/n20, work as n19And n20When not being 0, i2=n19/n20=-Z20/Z19=-2.5.
Wherein n19For the revolving speed of the second driving gear 19, n20For the revolving speed of the second driven gear 20, Z19For the second driving tooth
The number of teeth of wheel 19, Z20For the number of teeth of the second driven gear 20.
Because in the embodiment two, the input element of double double pinions group is heel row sun gear 13, and exports member
Part is front-seat sun gear 10, so iRow=n13/n10。
Rotation speed relation in double double pinions group between element equally meets following equation of motion:
The equation of motion of front-seat planetary gear set are as follows: n10+α1n12-(1+α1)n15=0, wherein α1=Z12/Z10=2；
The equation of motion of heel row planetary gear set are as follows: n13-α2n12-(1-α2)n15=0, wherein α2=Z12/Z13=3；
It can be by the transmission ratio i of double double pinions group according to connection equationRowIt calculates.
When neutral gear, i1=0, iRow=0.
At one grade, i2=-2.5；n15=0, iRow=-(α2/α1)=- 1.5；i1=n16/n17=-Z17/Z16=-3.5.
When second gear, i2=-2.5；n10=0, two formulas of joint obtain: iRow=(1- α2)/(1+α1)=- 0.67；i1=-3.5.
Transmission such as table 2 under the two gears automatic speed changer for machine different stalls for electric vehicle of embodiment two.
Table 2
By above-mentioned two embodiment it is found that two embodiments can reach two grades of speed changes, pass through the first brake 5, second
The cooperation of brake 6 and double double pinions group realizes two grades of adjustings of electric car, to adapt to automobile under different road conditions
Demand to torque reduces the situation that the motor feels hot, power consumption is fast and occurs, reached and extended electric car course continuation mileage
Purpose, while also improving the cost performance of electric car.
This programme is combined by changing the state (engaging or disengaging) of the first brake 5 and second brake 6, that is, can reach
Electric car is for one grade and two grades of demand, and the first brake 5 and second brake 6 do not act on output shaft 4,
It is thus relatively low for the intensity requirement of the first brake 5 and second brake 6；In addition, because of double double pinions group
All elements no matter under which gear be in meshing state, so during electric automobile gearshift, the power of automobile without
It needs to interrupt, improves the dynamic property of automobile, while it is steady to shift gears, and efficiently avoids impact of the automobile in shift process, has
Conducive to the extension of speed changer life-span, the comfort of electric car is also improved.
The switching of the connection type under different stalls, thus the axis at 4 both ends of output shaft are not present on the output shaft 4 of this programme
Withstand forces identical, the opposite service life for improving bearing.
Double double pinions group in this programme is by the way of interior external toothing, thus the volume of speed changer is smaller,
Overall structure is more compact；Furthermore total number of teeth in engagement is more between the element of double double pinions group, can transmit bigger turn
Square, so that being more widely applied.
Above-mentioned two embodiment is the citing under this programme, and those skilled in the art can also change according to specific occasion
The mode of input and output realizes the adjusting of transmission ratio to meet the needs of different occasions, it is hereby achieved that biggish transmission ratio
Range, applicability is wide, is conducive to promote；In addition, using twin-stage two-row planetary gear group, when carrying out the Transform Type design of product, nothing
Need to adjust the center of gear away from, without carrying out big modification to shell, inheritability is good, favorable expandability, so reduce product at
Sheet and development cycle.
What has been described above is only an embodiment of the present invention, and the common sense such as well known specific structure and characteristic are not made herein in scheme
Excessive description.It, without departing from the structure of the invention, can be with it should be pointed out that for those skilled in the art
Several modifications and improvements are made, these also should be considered as protection scope of the present invention, these all will not influence what the present invention was implemented
Effect and patent practicability.The scope of protection required by this application should be based on the content of the claims, in specification
The records such as specific embodiment can be used for explaining the content of claim.
Claims (9)
1. it is for electric vehicle two gear automatic speed changer for machine, including shell and for power transmitting input shaft and output shaft,
It is characterized by: including double double pinions group, the first brake and second brake in the shell, it is described double double
Grade planetary gear set includes front-seat planetary gear set and heel row planetary gear set, and the front row planetary gear set includes the front-seat sun
Wheel, front-seat planetary gear and gear ring, the heel row planetary gear set include heel row sun gear, heel row planetary gear and planet carrier, described
Heel row planetary gear and front-seat planetary gear are connect with planet carrier, and the heel row planetary gear is engaged with front-seat planetary gear, the heel row
Planetary gear is engaged with heel row sun gear；For first brake for braking to planet carrier, the input shaft drives heel row
Sun gear rotation；For braking to front-seat planetary gear set, the front row planetary gear set drives the second brake
Output shaft rotation.
2. two gears automatic speed changer for machine for electric vehicle according to claim 1, it is characterised in that: packet in the shell
Include first gear group, the first gear group includes the first driving gear and the first driven gear, first driving gear by
Front-seat planetary gear set drives, and first driven gear is fixedly connected with output shaft.
3. two gears automatic speed changer for machine for electric vehicle according to claim 2, it is characterised in that: second braking
For braking front-seat sun gear, the gear ring is fixedly connected device with the first driving gear.
4. two gears automatic speed changer for machine for electric vehicle according to claim 3, it is characterised in that: the heel row sun
Wheel is fixedly connected with input shaft.
5. two gears automatic speed changer for machine for electric vehicle according to claim 2, it is characterised in that: second braking
Device is fixedly connected for braking gear ring, the front row sun gear with the first driving gear, further includes second gear in the shell
Group, the second gear group include the second driving gear and the second driven gear, and second driving gear is fixed with input shaft
Connection, second driven gear are fixedly connected with heel row sun gear.
6. two gears automatic speed changer for machine for electric vehicle, feature described in -5 any claims exist according to claim 1
In: the driving motor for driving input shaft to rotate is fixedly connected on the input shaft.
7. two gears automatic speed changer for machine for electric vehicle, feature described in -5 any claims exist according to claim 1
In: the gear ratio section of the gear ring and heel row sun gear is (2.5,3.5), the gear ratio area of the gear ring and front-seat sun gear
Between be [1.5,2.5].
8. two gears automatic speed changer for machine for electric vehicle according to claim 2, it is characterised in that: the first gear
First driven gear of group and the gear ratio section of the first driving gear are [3,4].
9. two gears automatic speed changer for machine for electric vehicle according to claim 5, it is characterised in that: the second gear
Second driven gear of group and the gear ratio section of the second driving gear are [2,3].
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910189812.8A CN109780146A (en) | 2019-03-13 | 2019-03-13 | Two gears automatic speed changer for machine for electric vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910189812.8A CN109780146A (en) | 2019-03-13 | 2019-03-13 | Two gears automatic speed changer for machine for electric vehicle |
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| Publication Number | Publication Date |
|---|---|
| CN109780146A true CN109780146A (en) | 2019-05-21 |
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|---|---|---|---|
| CN201910189812.8A Pending CN109780146A (en) | 2019-03-13 | 2019-03-13 | Two gears automatic speed changer for machine for electric vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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