CN209262163U - Electronic automobile-used two-speed transmission and electric vehicle - Google Patents
Electronic automobile-used two-speed transmission and electric vehicle Download PDFInfo
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- CN209262163U CN209262163U CN201822057079.8U CN201822057079U CN209262163U CN 209262163 U CN209262163 U CN 209262163U CN 201822057079 U CN201822057079 U CN 201822057079U CN 209262163 U CN209262163 U CN 209262163U
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 122
- 230000007246 mechanism Effects 0.000 claims abstract description 22
- 238000000926 separation method Methods 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 230000008450 motivation Effects 0.000 claims 1
- 230000009467 reduction Effects 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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Abstract
The utility model relates to technical field of vehicle, disclose the electronic automobile-used two-speed transmission of one kind and electric vehicle, specifically, electronic automobile-used two-speed transmission includes transmission input shaft, the first transmission mechanism, the second transmission mechanism, output driven gear, brake and clutch；First transmission mechanism includes a planetary gear train and the first driving gear, and second transmission mechanism includes the second driving gear and the second driven gear.The utility model has two velocity modulation sections, and compared to fixed speed ratio reduction gearbox, accelerating ability and max. speed can be adjusted by adjusting the speed gear accordingly, restricts the two no longer by single speed ratio；Two velocity modulation sections make driving motor that can keep greater efficiency in vehicle low speed and while running at high speed simultaneously.
Description
Technical field
The utility model relates to technical field of vehicle, more particularly, to a kind of electronic automobile-used two-speed transmission and electric vehicle.
Background technique
Electric vehicle can meet the fixed energy conservation and environmental protection trend of country, significantly facilitate short distance traffic, and its by the energy and
The saving and protection of environment play an important role in national economy.
Electric vehicle generallys use the reduction gearbox of fixed speed ratio at present, and vehicle accelerating ability can be with max. speed by single speed ratio
Restriction, the two must be accepted or rejected；Simultaneously in the case where selected driving motor, entire power drive system be cannot achieve whole
Vehicle low speed and while running at high speed, keep greater efficiency.
Utility model content
It is existing in the prior art to solve the purpose of this utility model is to provide a kind of electronic automobile-used two-speed transmission
Restriction of the accelerating ability and max. speed of electric vehicle by single speed ratio, and in the case where selected driving motor, entire electricity
The technical issues of drive system cannot achieve in vehicle low speed and keep greater efficiency when running at high speed.
The purpose of this utility model, which also resides in, provides a kind of electric vehicle, to solve adding for electric vehicle existing in the prior art
The restriction of fast performance and max. speed by single speed ratio, and in the case where selected driving motor, entire power drive system without
The technical issues of method is realized in vehicle low speed and keeps greater efficiency when running at high speed.
Based on above-mentioned first purpose, the utility model provides a kind of electronic automobile-used two-speed transmission, described two fast speed changes
Case includes transmission input shaft, the first transmission mechanism, the second transmission mechanism, output driven gear, brake and clutch；
First transmission mechanism includes a planetary gear train and the first driving gear；The sun gear of the planetary gear train with
The transmission input shaft cutting ferrule is fixed, and the first driving gear empty set is on the transmission input shaft, first driving tooth
Wheel is fixedly connected with the planet carrier of the planetary gear train, and first driving gear is engaged with output driven gear；
The brake is connected to the gear ring peripheral side of the planetary gear train, and the brake is used to control the system of gear ring
Dynamic, when the brake separates, the gear ring can be rotated；When the brake combines, the gear ring braking；
Second transmission mechanism includes the second driving gear and the second driven gear, second driving gear and speed change
It is connected between case input shaft, and clutch is provided therebetween；Second driving gear is engaged with the second driven gear, and
Second driven gear and the output driven gear are coaxially disposed and are rigidly connected.
Further, the output driven gear and second driven gear pass through intermediate axis connection.
Further, the two-speed transmission further includes differential assembly, the output driven gear and the differential mechanism
The gear engaged transmission of assembly.
It further, further include motor output shaft, the motor output shaft and the transmission input shaft are keyed.
Further, the motor output shaft is connect with the first end of the transmission input shaft, second driving tooth
Wheel is arranged in the second end of the transmission input shaft, and the first end of the transmission input shaft and the is arranged in the sun gear
Between two ends.
Further, speed change of the first driving gear empty set between the sun gear and second driving gear
On case input shaft.
Further, the brake includes multiple, circumferentially-spaced arrangement of multiple brakes along the gear ring.
Further, the two-speed transmission includes gear box casing；
The brake is connected between the gear ring and the gear box casing, and the brake can be realized the tooth
Circle is connected or separated with the gear box casing.
Further, the structure of the brake and the clutch is identical；
The brake and the clutch respectively include hydraulic control system and hydraulic cylinder, the hydraulic control system
It is connect with the hydraulic cylinder, the hydraulic cylinder is fixed on gear box casing, and the head of the piston rod of the hydraulic cylinder can be with
Gear ring or the cooperation of the second driving gear.
Based on above-mentioned second purpose, the utility model additionally provides a kind of electric vehicle, and driving is provided on the electric vehicle
Motor, electronic automobile-used two-speed transmission provided by the utility model and gear box control unit；
The driving motor is connect by output shaft with the transmission input shaft, the driving motor, the brake
And the clutch is connect with the gear box control unit respectively.
Compared with prior art, the utility model has the following beneficial effects:
Electronic automobile-used two-speed transmission provided by the utility model, the two-speed transmission include transmission input shaft,
One transmission mechanism, the second transmission mechanism, output driven gear, brake and clutch；First transmission mechanism includes one
Planetary gear train and the first driving gear；The sun gear of the planetary gear train is fixed with the transmission input shaft cutting ferrule, and first is main
On the transmission input shaft, the planet carrier of first driving gear and the planetary gear train is fixed to be connected moving gear empty set
It connects, and first driving gear is engaged with output driven gear；The brake is connected to outside the gear ring of the planetary gear train
Side, the brake are used to control the braking of gear ring, and when the brake separates, the gear ring can be rotated；The braking
When device combines, the gear ring braking；Second transmission mechanism include the second driving gear and the second driven gear, described second
It is connected between driving gear and transmission input shaft, and clutch is provided therebetween；Second driving gear and second
Driven gear engagement, and second driven gear and the output driven gear are coaxially disposed and are rigidly connected.This is practical new
The electronic automobile-used two-speed transmission of type can realize that two gear speed are adjusted, and when first gear, brake is combined, control gear ring braking；Clutch
Device separation, the second driving gear of control are separated with transmission input shaft；First transmission mechanism transfer motion power at this time can get larger
Output torque improves the accelerating ability of vehicle.When second gear, brake separation, gear ring can dally under the action of planetary gear,
Clutch combines, and the second driving gear of control is connect with transmission input shaft；At this point, the second transmission mechanism transfer motion power, can lead to
Adjustment driving motor is crossed to specific rotation speeds section, to promote the efficiency of power drive system.Electronic automobile-used two speed of the utility model becomes
Fast case has two velocity modulation sections, and compared to fixed speed ratio reduction gearbox, accelerating ability and max. speed can be by adjusting the speed gear accordingly
Position is adjusted, and restricts the two no longer by single speed ratio；Two velocity modulation sections make driving motor in vehicle low speed and high speed row simultaneously
Greater efficiency can be kept when sailing；Further, the electronic automobile-used two-speed transmission of the utility model reduces for driving motor
Revolving speed and torque demand, reduce the manufacture difficulty and cost of driving motor.
Driving motor is provided on electric vehicle provided by the utility model, electronic automobile-used two speed provided by the utility model becomes
Fast case and gear box control unit, the driving motor are connect by output shaft with the transmission input shaft, the driving
Motor, the brake and the clutch are connect with the gear box control unit respectively.Compared with prior art, this is practical
Novel electric vehicle and electronic automobile-used two-speed transmission beneficial effect having the same provided by the utility model, by above-mentioned to this
The description of the beneficial effect for the electronic automobile-used two-speed transmission that utility model provides also can intuitively be known, no longer detailed herein
It repeats.
Detailed description of the invention
It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art
Specific embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below
In attached drawing be that some embodiments of the utility model are not paying creativeness for those of ordinary skill in the art
Under the premise of labour, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the simplified schematic diagram of the electronic automobile-used two-speed transmission of the utility model embodiment；
Fig. 2 is power flow diagram of the electronic automobile-used two-speed transmission of the utility model embodiment in a gear；
Fig. 3 is power flow diagram of the electronic automobile-used two-speed transmission of the utility model embodiment in second gear.
Icon: 1- driving motor；2- transmission input shaft；3- sun gear；4- planetary gear；5- planet carrier；6- brake；
7- clutch；8- jackshaft；The first driving gear of 9-；10- exports driven gear；The second driving gear of 11-；12- second is driven
Gear；13- differential assembly；14- gear ring.
Specific embodiment
The technical solution of the utility model is clearly and completely described below in conjunction with attached drawing, it is clear that described
Embodiment is the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, originally
Field those of ordinary skill every other embodiment obtained without making creative work belongs to practical
Novel protected range.
In the description of the present invention, it should be noted that such as occur term " center ", "upper", "lower", " left side ",
" right side ", "vertical", "horizontal", "inner", "outside" etc., the orientation or positional relationship of instruction are orientation based on the figure or position
Relationship is set, is merely for convenience of describing the present invention and simplifying the description, rather than the device or element of indication or suggestion meaning
It must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.This
Outside, such as there is term " first ", " second ", " third " are used for description purposes only, be not understood to indicate or imply relatively heavy
The property wanted.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, such as there is term
" installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be fixedly connected, may be a detachable connection or one
Connect to body；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, it can also be indirect by intermediary
It is connected, can be the connection inside two elements.For the ordinary skill in the art, on being understood with concrete condition
State the concrete meaning of term in the present invention.
Embodiment one
Referring to shown in Fig. 1 to Fig. 3, present embodiments providing a kind of electronic automobile-used two-speed transmission comprising transmission housing
Body, be provided in transmission housing body transmission input shaft 2, the first transmission mechanism, the second transmission mechanism, output driven gear 10,
Brake 6, clutch 7, differential assembly 13.Wherein, the first transmission mechanism includes a planetary gear train and the first driving gear
9, the second transmission mechanism includes the second driving gear 11 and the second driven gear 12.Transmission input shaft 2 can be with driving motor 1
Motor output shaft connection, differential box assembly can be connect by respective members with wheel.
Planetary gear train includes being arranged in sun gear 3, planetary gear 4, planet carrier 5 and gear ring 14, wherein planetary gear 4 is arranged
On planet carrier 5, and planetary gear 4 is arranged between sun gear 3 and gear ring 14, that is, sun gear 3 is meshed with planetary gear 4, planet
Wheel 4 is meshed with the ring gear of gear ring 14.When specific setting, sun gear 3 is fixed on the transmission input shaft 2, planet
5 empty set of frame is on transmission input shaft 2, and planet carrier 5 is connect with the first driving gear 9, and the first driving gear 9 equally can be empty
It covers on the transmission input shaft 2.
Brake 6 is for realizing the braking of gear ring 14, and when brake 6 separates, gear ring 14 can be rotated；Brake 6 combines
When, gear ring 14 is braked.Specific brake 6 may be provided on gear box casing, and brake 6 is by by gear ring 14 and transmission housing
Body connects or separates, thus realize the braking of gear ring 14 with separate namely gear ring 14 can be connected to gear box casing by brake 6
On to realize the braking of gear ring 14, brake 6 can also separate gear ring 14 with gear box casing, enable gear ring 14 in planetary gear
It is rotated under the action of 4.
Clutch 7 can be realized connecting or separating namely second actively for the second driving gear 11 and transmission input shaft 2
Gear 11 is not directly connected with transmission input shaft 2, but is realized by clutch 7 and connect and separate；Second driving gear
11 and the engaged transmission of the second driven gear 12.
The output driven gear 10 is nibbled respectively with the gear of the differential assembly 13 and first driving gear 9
Transmission is closed, the output driven gear 10 is coaxially disposed and is rigidly connected with second driven gear 12.Namely output is driven
Gear 10 can impart power to differential assembly 13, and exporting driven gear 10 is the first driving gear 9 and the second active
The common power transfer assembly of gear 11, the first driving gear 9 are that output driven tooth is imparted power to by way of engagement
Wheel 10, the second driving gear 11 are to be rotated coaxially by driving output driven gear 10 to impart power to output driven gear
10.Specifically, as shown in Figure 1, output driven gear 10 can be rigidly connected with the second driven gear 12 by jackshaft 8.
It is understood that the electronic automobile-used two-speed transmission of the utility model embodiment passes through planetary gear train and external toothing tooth
The combined nesting of (the first driving gear 9) is taken turns on the transmission input shaft 2 and brake 6, clutch 7 realize two
Switching between a difference gear.
Specifically, the power that driving motor 1 generates is passed to gearbox by transmission input shaft 2.It is (empty as shown in Figure 2
The power flow direction that line indicates), driving motor 1 rotates forward, and (gear ring 14 can not turn the combination of brake 6 with gear box casing rigid connection
It is dynamic), clutch 7 separates (the second driving gear 11 is separated with transmission input shaft 2) first gear of Shi Shixian, and power is successively
By transmission input shaft 2, sun gear 3, planetary gear 4, planet carrier 5, (empty set is in transmission input shaft 2 for the first driving gear 9
On), output driven gear 10 be transmitted to differential assembly 13.(dotted line indicates power flow direction) as shown in Figure 3, driving motor 1 is just
Turn, (gear ring 14 separates the separation of brake 6 with gear box casing, and only by the active force of planetary gear 4, gear ring 14 is unloaded to be turned gear ring 14
It is dynamic), clutch 7 combines (the second driving gear 11 is connect with transmission input shaft 2) second gear of Shi Shixian, and power successively leads to
It crosses transmission input shaft 2, the second driving gear 11, the second driven gear 12, jackshaft 8, output driven gear 10 and is transmitted to difference
Fast device assembly 13.
It should be noted that above-mentioned first gear and the second gear correspond to motor rotating forward, forward gear can be regarded as at this time；
When reversing gear, driving motor 1 is inverted, and the two gear power transmission process to reverse gear are identical when rotating forward with motor, and details are not described herein.It needs
Illustrate, the forward and reverse of driving motor 1 be in contrast, namely reversion be rotate forward opposite direction.
The electronic automobile-used two-speed transmission of the utility model embodiment has two velocity modulation sections, compared to fixed speed ratio reduction gearbox,
Accelerating ability and max. speed can be adjusted by adjusting the speed gear accordingly, restrict the two no longer by single speed ratio；Simultaneously
Two velocity modulation sections make driving motor 1 that can keep greater efficiency in vehicle low speed and while running at high speed.
The transmission input shaft 2 of the electronic automobile-used two-speed transmission of the utility model embodiment can use key with motor output shaft
Connection.
As shown in Figure 1, the positional relationship of the electronic automobile-used each component of two-speed transmission of the utility model embodiment, can be
Motor output shaft is connect with the first end of the transmission input shaft 2, and the setting of the second driving gear 11 is inputted in the gearbox
The second end of axis 2, sun gear 3 are arranged between the first end and second end of the transmission input shaft 2；First driving gear 9
Empty set is on the transmission input shaft 2 between the sun gear 3 and second driving gear 11.
It is understood that planetary gear train and the first driving gear 9 are nested on transmission input shaft 2, compared to other
Two-speed transmission structure mainly realizes shift by the different external gear pump pairs of the mobile engagement of synchronizer, can be larger in acquisition
Reduce plant bulk while speed ratio, so that single unit system structure section gathers, occupies little space.
The brake 6 of this utility model embodiment electric vehicle is including multiple, and multiple brakes 6 are along the gear ring 14
Circumferentially-spaced arrangement.Preferably, the brake 6 may include two, and opposite two of the gear ring 14 are arranged in two brakes 6
Side.
It is understood that multiple brakes 6 can simultaneously brake gear ring 14, ensure that steady when gear ring 14 is braked
It is qualitative.
The present embodiment brake 6 and clutch 7 can use the form of hydraulic control.Specifically, brake 6 and institute
It is identical to state 7 structure of clutch, respectively includes hydraulic control system, hydraulic cylinder and friction plate, the hydraulic control system and institute
Hydraulic cylinder connection is stated, the hydraulic cylinder is fixed on gear box casing, and the friction plate of brake is arranged on the outer shaft of gear ring 14,
The friction plate of clutch is arranged on the second driving gear 11.It the head of the piston rod of the hydraulic cylinder of brake 6 can be with gear ring
Friction plate cooperation on 14 is fixed by gear ring 14；The piston rod of the hydraulic cylinder of clutch 7 can cooperate on the second driving gear 11
Friction plate push the second driving gear 11 close to or far from transmission input shaft 2.Preferred brake 6 and clutch 7
The head of the piston rod of hydraulic cylinder is provided with thrust bearing, and thrust bearing can cooperate with friction plate realizes brake 6 or clutch
The function of device 7.
It is understood that realizing different dynamic by the combination of the brake 6 and clutch 7 of hydraulic control gear ring 14
Transmission path, control precision is high, shift speed is fast and stability is good.
The brake 6 and clutch 7 of the electronic automobile-used two-speed transmission of the utility model embodiment should be with gearbox controls
Unit processed is attached, and gear box control unit should also carry out chain control with motor.It is directed in gear box control unit
The operating condition of one gear, second gear and the gear that reverses gear, second gear of reversing gear is preset with controls program accordingly respectively, in the control program at least
It include direction of motor rotation, clutch state, brake status.Gear box control unit is according to control program Intelligent control electric
The state of machine, clutch and brake is to realize shift.
In conclusion the electronic automobile-used two-speed transmission of the utility model embodiment, a gear can get larger output torque and mention
High vehicle accelerating ability, second gear can adjust driving motor and promote power drive system efficiency to specific rotation speeds section.Compared to fixation
Speed ratio reduction gearbox reduces revolving speed and torque demand for driving motor, reduces the manufacture difficulty and cost of driving motor.
And be different from other two-speed transmission structures and mainly realize shift by the different external gear pump pairs of the mobile engagement of synchronizer, this
The electronic automobile-used two-speed transmission of utility model embodiment can obtained compared with large speed ratio using the structure of planetary gear and nested axis
While reduce size, while the structure of brake and clutch has shift speed fast, the good advantage of stability.
The present embodiment also provides a kind of electric vehicle, driving motor 1 is provided on electric vehicle, the utility model embodiment provides
Electronic automobile-used two-speed transmission and gear box control unit.Driving motor 1 passes through output shaft and the transmission input shaft 2
Connection, driving motor 1, the brake 6 and the clutch 7 are connect with the gear box control unit respectively.
Existing conventional electric car motor, gearbox control can be used in the driving motor 1 of the utility model embodiment electric vehicle
Unit can be understood as controller, inside be preset with corresponding control program；Electronic automobile-used two-speed transmission may be provided at electronic
In the frame chassis of vehicle.
Compared with prior art, the utility model electric vehicle has with electronic automobile-used two-speed transmission provided by the utility model
Identical beneficial effect passes through the description of the above-mentioned beneficial effect to electronic automobile-used two-speed transmission provided by the utility model
Can intuitively it know, in this not go into detail.
Finally, it should be noted that the above various embodiments is only to illustrate the technical solution of the utility model, rather than it is limited
System；Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should
Understand: it is still possible to modify the technical solutions described in the foregoing embodiments, or to some or all of
Technical characteristic is equivalently replaced；And these are modified or replaceed, it does not separate the essence of the corresponding technical solution, and this is practical new
The range of each embodiment technical solution of type.
Claims (10)
1. a kind of electronic automobile-used two-speed transmission, which is characterized in that the two-speed transmission includes transmission input shaft, the first biography
Motivation structure, the second transmission mechanism, output driven gear, brake and clutch；
First transmission mechanism includes a planetary gear train and the first driving gear；The sun gear of the planetary gear train with it is described
Transmission input shaft cutting ferrule is fixed, the first driving gear empty set on the transmission input shaft, first driving gear with
The planet carrier of the planetary gear train is fixedly connected, and first driving gear is engaged with output driven gear；
The brake is connected to the gear ring peripheral side of the planetary gear train, and the brake is used to control the braking of gear ring, institute
When stating brake separation, the gear ring can be rotated；When the brake combines, the gear ring braking；
Second transmission mechanism includes the second driving gear and the second driven gear, and second driving gear and gearbox are defeated
Enter and connected between axis, and clutch is provided therebetween；Second driving gear is engaged with the second driven gear, and described
Second driven gear and the output driven gear are coaxially disposed and are rigidly connected.
2. electronic automobile-used two-speed transmission according to claim 1, which is characterized in that the output driven gear with it is described
Second driven gear passes through intermediate axis connection.
3. electronic automobile-used two-speed transmission according to claim 1 or 2, which is characterized in that the two-speed transmission also wraps
Include differential assembly, the gear engaged transmission of the output driven gear and the differential assembly.
4. electronic automobile-used two-speed transmission according to claim 1 or 2, which is characterized in that it further include motor output shaft, institute
It states motor output shaft and the transmission input shaft is keyed.
5. electronic automobile-used two-speed transmission according to claim 4, which is characterized in that the motor output shaft and the change
The first end of fast case input shaft connects, and second driving gear is arranged in the second end of the transmission input shaft, it is described too
Sun wheel is arranged between the first end and second end of the transmission input shaft.
6. electronic automobile-used two-speed transmission according to claim 5, which is characterized in that the first driving gear empty set exists
On transmission input shaft between the sun gear and second driving gear.
7. electronic automobile-used two-speed transmission according to claim 1 or 2, which is characterized in that the brake include it is multiple,
Circumferentially-spaced arrangement of multiple brakes along the gear ring.
8. electronic automobile-used two-speed transmission according to claim 1 or 2, which is characterized in that the two-speed transmission includes
Gear box casing；
The brake is connected between the gear ring and the gear box casing, the brake can be realized the gear ring with
The gear box casing connects or separates.
9. electronic automobile-used two-speed transmission according to claim 1, which is characterized in that the brake and the clutch
The structure of device is identical；
The brake and the clutch respectively include hydraulic control system and hydraulic cylinder, the hydraulic control system and institute
Hydraulic cylinder connection is stated, the hydraulic cylinder is fixed on gear box casing, and the head of the piston rod of the hydraulic cylinder can be with gear ring
Or second driving gear cooperation.
10. a kind of electric vehicle, which is characterized in that be provided on the electric vehicle described in driving motor, claim any one of 1-9
Electronic automobile-used two-speed transmission and gear box control unit；
The driving motor is connect by output shaft with the transmission input shaft, the driving motor, the brake and
The clutch is connect with the gear box control unit respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822057079.8U CN209262163U (en) | 2018-12-07 | 2018-12-07 | Electronic automobile-used two-speed transmission and electric vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822057079.8U CN209262163U (en) | 2018-12-07 | 2018-12-07 | Electronic automobile-used two-speed transmission and electric vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209262163U true CN209262163U (en) | 2019-08-16 |
Family
ID=67562465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822057079.8U Active CN209262163U (en) | 2018-12-07 | 2018-12-07 | Electronic automobile-used two-speed transmission and electric vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209262163U (en) |
-
2018
- 2018-12-07 CN CN201822057079.8U patent/CN209262163U/en active Active
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