CN206004505U - A kind of wheel hub motor and electric automobile - Google Patents
A kind of wheel hub motor and electric automobile Download PDFInfo
- Publication number
- CN206004505U CN206004505U CN201620845161.5U CN201620845161U CN206004505U CN 206004505 U CN206004505 U CN 206004505U CN 201620845161 U CN201620845161 U CN 201620845161U CN 206004505 U CN206004505 U CN 206004505U
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- China
- Prior art keywords
- wheel hub
- stator
- hub motor
- rotor
- outer rotor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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- Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
Abstract
The utility model is related to electric vehicle engineering field, more particularly to a kind of wheel hub motor and electric automobile.The wheel hub motor includes：Stator, stator interior rotate internal rotor and be looped around stator exterior rotation outer rotor；Stator is coaxially set on internal rotor, and outer rotor is coaxially set on stator.The wheel hub motor output power is big, can meet the bigger power demand of electric automobile, and simple structure, efficiency high.
Description
Technical field
The utility model is related to take turns electric vehicle engineering field, especially relates to a kind of wheel hub motor and electric automobile.
Background technology
Electric automobile has become as now automobile industry and has much prospective field, used as the wheel hub motor of its driving means
Also receive much concern.Wheel hub motor is also referred to as wheel inner electric machine, the feature of its maximum be exactly by power set, transmission device and
Brake apparatus is all combined in wheel hub, can be greatly simplified the mechanical part of electric automobile.In-wheel motor driving system
System is largely divided into two kinds of structural shapes according to the rotor type of motor：Inner-rotor-type and external-rotor-type.
Wheel hub motor is all single-rotor motor at present, and its output power is little.When electric automobile is higher to power demand,
Wheel hub motor can not meet the power demand of electric automobile.
Utility model content
The purpose of this utility model is to provide a kind of wheel hub motor and electric automobile, to solve present in prior art
The technical problem that the larger power demand of electric automobile can not be met because electric automobile output power is less.
In a first aspect, a kind of wheel hub motor that the utility model is provided, including：Stator, the stator interior rotate
Internal rotor and the outer rotor for being looped around stator exterior rotation；The stator is coaxially set on internal rotor, the outer rotor
Coaxially it is set on the stator；
Interior winding is provided with the inside of the stator, is provided with outer winding on the outside of the stator.
Further, the interior winding is controlled by the first circuit control system, and the outer winding is by second circuit control system
System control.
Further, the first end of the stator is fixedly connected with the first gripper shoe, and first gripper shoe is used for fixing
Connection automobile chassis；The second end of the stator is fixedly connected with the second gripper shoe, and second gripper shoe is supported with described first
Plate carries out axial limiting to the internal rotor jointly.
Further, the internal rotor is fixedly connected with the support shaft of internal rotor with wearing, and the two ends of the support shaft are divided
It is not connected with first gripper shoe and the second gripper shoe bearing.
Further, the support shaft is fixedly connected by outer rotor connecting plate with the first end of the outer rotor.
Further, the outer rotor connecting plate is fixedly connected with wheel hub.
Further, the second end of the outer rotor is connected with the first gripper shoe bearing.
Further, heat abstractor is provided with the outer rotor.
Second aspect, the utility model provide a kind of electric automobile, it is characterised in that being provided with above-mentioned first aspect may
Embodiment in any one wheel hub motor.
A kind of wheel hub motor that the utility model is provided, stator are fixed, stator interior are provided with relative stator and coaxially turn
Dynamic internal rotor, is looped around stator exterior and is provided with the outer rotor that relative stator is rotated coaxially.According to hot-wire coil in magnetic field
The principle of stress, fixing stator produce magnetic field, when driving internal rotor and outer rotor to rotate simultaneously, the output power of wheel hub motor
Greatly increase.Wheel hub motor output power is big, can meet the bigger power of electric automobile of the wheel hub motor is installed will
Ask, and simple structure, efficiency high.
Description of the drawings
In order to be illustrated more clearly that the utility model specific embodiment or technical scheme of the prior art, below will be right
Needed for specific embodiment or description of the prior art, accompanying drawing to be used is briefly described, it should be apparent that, describe below
In accompanying drawing be some embodiments of the present utility model, for those of ordinary skill in the art, do not paying creativeness
On the premise of work, other accompanying drawings can also be obtained according to these accompanying drawings.
A kind of structural representation of wheel hub motor that Fig. 1 is provided for the utility model embodiment.
Reference：
100- stator；201- internal rotor；202- outer rotor；
The first gripper shoe of 301-；The second gripper shoe of 302-；400- support shaft；
500- outer rotor connecting plate；600- fin.
Specific embodiment
The technical solution of the utility model is clearly and completely described below in conjunction with accompanying drawing, it is clear that described
Embodiment is a part of embodiment of the utility model, rather than whole embodiments.Based on the embodiment in the utility model, this
The every other embodiment obtained under the premise of creative work is not made by field those of ordinary skill, belongs to this practicality
Novel protected scope.
In description of the present utility model, it should be noted that term " " center ", " on ", D score, "left", "right", " perpendicular
Directly ", the orientation of instruction such as " level ", " interior ", " outward " or position relationship are based on orientation shown in the drawings or position relationship, are only
For the ease of describing the utility model and simplifying description, rather than the device or element of instruction or hint indication must be with specific
Orientation, with specific azimuth configuration and operation, therefore it is not intended that to restriction of the present utility model.Additionally, term " the
One ", " second ", " the 3rd " are only used for describing purpose, and it is not intended that indicating or hint relative importance.
In description of the present utility model, it should be noted that unless otherwise clearly defined and limited, term " peace
Dress ", " being connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected, or be detachably connected, or integratedly
Connection；Can be mechanically connected, or electrically connect；Can be joined directly together, it is also possible to be indirectly connected to by intermediary,
It can be the connection of two element internals.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition
Concrete meaning of the language in the utility model.
As shown in figure 1, a kind of wheel hub motor that the present embodiment is provided, including stator 100, in 100 inner rotation of stator
Internal rotor 201 and the outer rotor 202 for being looped around the outside rotation of stator 100；Stator 100 is coaxially set on outer rotor 202, is turned outward
Son 202 is coaxially set on stator 100.According to the principle of electrified wire stress in magnetic field, drive when stator 100 produces magnetic field
Internal rotor 201 and outer rotor 202 are while when rotating, the output power of the wheel hub motor is greatly increased.It can be seen that, the wheel hub motor is defeated
Go out power big, the bigger power demand of electric automobile, and simple structure, efficiency high can be met.
The wheel hub motor of the present embodiment is also referred to as wheel inner electric machine, that is, the motor being mounted in wheel.With orthodox car
Motor is compared, and power set, transmission device and brake apparatus are exactly all integrated wheel hub by the maximum feature of wheel hub motor
Interior, being able to will be greatly simplified for the mechanical part of electric vehicle.Wheel hub motor compared to conventional motors, with lot of advantages.
First, wheel hub motor eliminates substantial amounts of legacy device, has simplified the structure of vehicle.For orthodox car,
Clutch, speed changer, power transmission shaft, differential mechanism or even transfer gear are all requisite, and these parts not only increased vehicle
Weight, complicates the structure of vehicle, in addition it is also necessary to which fault is discharged in periodic maintenance.The structure that hub wheel is simplified just solves these
Problem, in addition, can obtain more preferable space availability ratio using the vehicle of In-wheel motor driving, meanwhile, also in certain journey
The efficiency of transmission is increased on degree.
Secondly, wheel hub motor can realize the type of drive of Various Complex.Because wheel hub motor possesses single wheel independence
The characteristic of driving, so either forerunner, rear-guard or 4 wheel driven form, it easily can realize, and AWD is in wheel hub electricity
Implement on the vehicle that machine drives very easy.While wheel hub motor can be even inverted by the different rotating speeds of left and right wheelses
Realize the differential steering of caterpillar is similar to, the radius of turn of vehicle is greatly reduced, can almost be realized under special circumstances
Pivot stud, has very big value for special vehicle.
Finally, wheel hub motor can be combined with multiple new-energy automobile technology.New forms of energy vehicle much adopts electric drive,
Therefore In-wheel motor driving is also just well worth doing.Either pure electronic or fuel cell electric vehicle, also or increases journey electric motor car,
Can be with wheel hub motor as main drive.Even for hybrid electric vehicle, it would however also be possible to employ wheel hub motor conduct
Power-assisted when starting or anxious acceleration, realizes a tractor serves several purposes.Meanwhile, a lot of technology of new-energy automobile, such as braking energy are returned
Receive and can also easily realize in the vehicle of In-wheel motor driving.
Motor is typically made up of motor stator and rotor two parts, is used to realize the converting means of electric energy and mechanical energy
Put.
The drive system of existing wheel hub motor is broadly divided into two kinds of structural shapes according to the rotor type of motor：Inner-rotor-type
And external-rotor-type.Wherein, external-rotor-type typically adopts low speed external rotor electric machine, and the maximum speed of motor is in 1000-1500r/
Min, nothing deceleration device, the rotating speed of wheel is identical with motor.And inner-rotor-type then typically adopts high speed inner rotor motor, it is equipped with solid
The decelerator of stable drive ratio, is to obtain higher power density, and the rotating speed of motor may be up to 10000r/min.
The wheel hub motor that the present embodiment is provided has the rotor that two relative stator 100 are rotated coaxially, and is internal rotor 201 respectively
With outer rotor 202.Wherein, fixing stator 100 is coaxially set on internal rotor 201, and outer rotor 202 is coaxially set in stator
On 100.
Such structure is improve operating efficiency, considerably increases on the basis of volume and weight for reducing equipment
Output power, can meet the requirement of energy-conservation and speed governing well, and have superior runnability.
100 inner side of stator is provided with interior winding, is provided with outer winding on the outside of which.
Motor includes motor stator and rotor two large divisions, and actionless part is exactly motor stator, its effect
Magnetic field is mainly produced.During operation relative to motor stator rotate be exactly rotor, its Main Function be exactly produce electromagnetism turn round
Square and induced electromotive force, are hinges that motor carries out energy conversion.
Wherein, motor stator is the winding generation magnetic field by being disposed thereon.Winding on motor stator is led to
Electricity, stator produce magnetic field.Hot-wire coil in electronics rotor senses magnetic field and produces Ampere force that driving rotor is rotated.
There are 202 two rotors of internal rotor 201 and outer rotor in the present embodiment, can be independent in order to reach two rotors
The purpose of rotation, the inner side of stator be provided with internal rotor 201 interact interior winding, the outside of stator be provided with
The outer winding that outer rotor 202 interacts.
Such structure, can easily realize the independently rotated of internal rotor 201 and outer rotor 202.Need in electric automobile
During larger power, to internal rotor 201 and outer rotor 202 while being energized, the magnetic field produced due to stator 100 is to internal rotor 201
Ampere force is produced with outer rotor 202, internal rotor 201 and outer rotor 202 are rotated, output kinetic energy.And work as automobile and do not need big moving
During power, only can power to internal rotor 201, internal rotor 201 is rotated under the magnetic field that stator 100 is produced is to its Ampere force effect
Output kinetic energy.Or only outer rotor 202 is powered, outer rotor 202 turns under the magnetic field that stator 100 is produced is to its Ampere force effect
Dynamic output kinetic energy.So as to the power of output will reduce, and meet the power demand of electric automobile, while energy saving.
It should be noted that in actual enforcement, such setting can also realize power recovery.Specifically, it is being not required to
In the case of wanting larger output power, only power not to internal rotor 201 and power to outer rotor 202, the magnetic field that interior winding is produced
There iss Ampere force to internal rotor 201, internal rotor 201 is rotated.When internal rotor 201 and outer rotor 202 link together, interior
Rotor 201 drives outer rotor 202 to rotate, and in magnetic field, outer rotor 202 rotates cutting magnetic induction line, is produced using electromagnetic induction principle
Electric current, it is possible to achieve generating is acted on, and whole system is powered, realizes power recovery, otherwise then anti-.
Wherein interior winding is controlled by the first circuit control system, and outer winding is controlled by second circuit control system.
Circuit control system is exactly startup, reversion, braking, speed governing and the protection for realizing motor, control main traction power source with
Energy transmission between motor.In general, the circuit control system of motor in electric automobile is by control signal interface circuit, motor control
Circuit processed and drive circuit composition.Wherein, electric machine controller is most important part in circuit control system.
Used as the control centre of whole brakes, it is made up of electric machine controller inverter and controller two parts.Inverse
Become device and the electric energy that battery conveying comes is received, be that electric motor of automobile provides power supply.Controller receives the signals such as motor speed and feeds back to
Instrument, when braking occurring or accelerating behavior, controller controls the lifting of frequency converter frequency, accelerates so as to reach or slows down
Purpose.
The quality of design, characteristic of electric controller, the function of the microprocessor for being adopted, device for power switching circuit and
Peripheral devices layout etc., is directly connected to performance and the running status of car load, also the performance of impact electric machine controller itself and effect
Rate.
Meanwhile, circuit controller also has defencive function.Specifically, mainly there are braking power-off protection, under-voltage protection, mistake
The functions such as stream protection, overload protection, deficient speed protection.
Realize interior winding and outer winding control internal rotor 201 and outer rotor 202 respectively, the present embodiment interior around son by
One circuit control system controls, and outer winding is then controlled by second circuit control system.
The first end of stator 100 is fixedly connected with the first gripper shoe 301, and the first gripper shoe 301 is used for being fixedly connected automobile
Chassis；100 second end of stator is fixedly connected with the second gripper shoe 302, and the second gripper shoe 302 is jointly right with the first gripper shoe 301
Internal rotor 201 carries out axial limiting.
As shown in figure 1, the first end of stator 100 is fixedly connected with the first gripper shoe 301, the first gripper shoe 301 and automobile
Chassis is fixedly connected.First gripper shoe 301 is the supporting construction of whole wheel hub motor.
Second end of stator 100 is fixedly connected the second gripper shoe 302.First gripper shoe 301, stator 100 and second are supported
Plate 302 constitutes a receiving space.The internal rotor 201 coaxial with stator 100 is arranged at the receiving space, 100 turns of relative stator
Dynamic.First gripper shoe 301 and the second gripper shoe 302 carry out spacing in the axial direction to internal rotor 201.
Internal rotor 201 is fixedly connected with support shaft 400, the two ends of support shaft 400 respectively with the first gripper shoe 301 and second
302 bearing of gripper shoe connects.
The stator 100 of the wheel hub motor that the present embodiment is provided, internal rotor 201 and outer rotor 202 are all around support shaft 400
Circumferentially rotate, support shaft 400 is fixedly connected with internal rotor 201.
That support shaft 400 can be integrated with internal rotor 201, or linked together by other parts, example
Such as, can be pin connection between the two.In the present embodiment, support shaft 400 is one with internal rotor 201.
The two ends of support shaft 400 are connected with the first gripper shoe 301 and the second gripper shoe 302 respectively, preferably bearing connection.
Bearing is important fixing component in machinery, and major function is supporting machinery rotary body, that is, undertake radial load, drop
Coefficient of friction in its motion process low, and ensure its rotating accuracy.According to sportsman and the difference of frictional property, bearing can divide
For rolling bearing and two big class of sliding bearing.
Rolling bearing is that the sliding friction between the axle of operating and axle is changed into rolling friction, so as to reduce friction loss
A kind of accurate mechanical organ.Rolling bearing is typically made up of outer ring, inner ring, four parts of rolling element and retainer.Wherein, interior
The effect of circle is to merge to rotate together with the axis with axle matching.The effect of outer ring is matched with bearing block, is played a supportive role.Roll
Bar is equably rolling element to be evenly distributed between inner ring and outer ring by means of retainer, and its size and number is directly affected
Performance and the life-span of rolling bearing.Retainer is uniformly distributed can rolling element, place rolling element and come off, guide rolling element
Lubrication is played in rotation.
The present embodiment preferably adopts rolling bearing, because rolling bearing running accuracy is higher, coefficient of friction compares sliding bearing
Little, and rolling bearing has been realized in standardization, seriation, generalization, uses and keeps in repair and be very convenient.
It should be noted that in the bearing use of the present embodiment, lubrication work will be carried out to bearing.
Support shaft 400 is fixedly connected by 202 connecting plate of outer rotor with the first end of outer rotor 202.
202 coaxial sleeve of outer rotor is arranged on stator 100, is rotated coaxially around support shaft 400.The first end of outer rotor 202
Linked together with support shaft 400 by outer rotor connecting plate 500.
Outer rotor connecting plate 500 is fixedly connected with wheel hub.
Wheel hub motor converts electrical energy into kinetic energy and exports on the wheel hub of electric automobile, and the wheel of driving electric automobile turns
Dynamic.In the present embodiment, outer rotor connecting plate 500 is directly adopted with the wheel hub of electric automobile wheel mode connects for screw, realize transmission.
Second end of outer rotor 202 is connected with the first gripper shoe bearing.
Second end of outer rotor 202 is connected with the first gripper shoe, and its connected mode connects for bearing.Stator 100, internal rotor
201 and outer rotor 202 connected by support shaft 400, the first gripper shoe 301, the second gripper shoe 302 and outer rotor connecting plate 500
Together, the transmission of whole system is realized.
Heat abstractor is provided with outer rotor 202.
In operation process, electric energy is converted to kinetic energy to motor, always has certain energy loss, and due to have copper,
The reasons such as iron loss, can produce very big heat.If these heats can not pass to motor surface by modes such as conduction in time,
And be dispersed in surrounding medium by methods such as thermal convection current or heat radiations, the temperature of the winding of motor internal persistently will be raised,
Cause motor cisco unity malfunction, or even burn.Meanwhile, motor internal also has the more weak insulating materials of temperature capacity, temperature
Spend height the electrical property, mechanical performance and the chemical property that make insulating materials are significantly deteriorated, greatly shorten the service life of motor.
In the state of motor feels hot is constant, want to make the temperature of machine winding to reduce, improve conduction, the heat radiation energy of motor inside and outside
Power is crucial.Wheel hub motor has higher sealing requirements again, so radiating is more difficult.
Higher in view of wheel hub motor sealing requirements, in the present embodiment, on outer rotor 202, it is provided with fin
600.Fin 600 is one kind of heat abstractor, how to make tabular, sheet, splintery etc. by aluminium alloy, brass or bronze.
Second aspect, the utility model provide a kind of electric automobile, it is characterised in that being provided with above-mentioned first aspect may
Embodiment in any one wheel hub motor.
Above-mentioned wheel hub motor is separately installed with four wheels of the electric automobile that the present embodiment is provided, can not only realize
Multiple type of drive, can also meet the different power demand of electric automobile.
When electric automobile needs larger power, four wheel hub motors can be operated simultaneously.Interior winding on stator 100 and
Outer winding produces magnetic field while being energized, and its internal internal rotor 201 and outer rotor 202 are all driven by the Ampere force in magnetic field and rotate
Produce power and export, meet the power demand of electric automobile.When electric automobile need not too big power when, four wheel hub electricity
Machine can not simultaneously work, and save energy.Also, the power recovery of whole wheel hub motor can also be realized.
Specifically, when being only individually energized to the internal rotor 201 on wheel hub motor stator 100, the interior winding of stator 100 is produced
Magnetic field, now, correspondingly only internal rotor 201 is subject to the effect rotation of magnetic field Ampere force and output kinetic energy, now output kinetic energy
Less.The work that is connected due to support shaft 400, the first gripper shoe 301, the second gripper shoe 302 and outer rotor connecting plate 500
With internal rotor 201 can drive outer rotor 202 to rotate.Outer rotor 202 is rotated, and is moved in the magnetic field that outer winding is produced, and cuts magnetic
Sense line, electromagnetic induction produce electric energy.At this moment, wheel hub motor can produce electric energy, realize power recovery.
Finally it should be noted that：Various embodiments above is only in order to illustrating the technical solution of the utility model, rather than which is limited
System；Although being described in detail to the utility model with reference to foregoing embodiments, one of ordinary skill in the art should
Understand：Which still can be modified to the technical scheme described in foregoing embodiments, or to which part or whole
Technical characteristic carries out equivalent；And these modifications or replacement, do not make the essence of appropriate technical solution depart from this practicality new
The scope of each embodiment technical scheme of type.
Claims (9)
1. a kind of wheel hub motor, it is characterised in that include：Stator, the stator interior rotate internal rotor and be looped around institute
State the outer rotor of stator exterior rotation；The stator is coaxially set on internal rotor, and the outer rotor is coaxially set in described fixed
On son；
Interior winding is provided with the inside of the stator, is provided with outer winding on the outside of the stator.
2. wheel hub motor according to claim 1, it is characterised in that the interior winding is by the first circuit control system control
System, the outer winding are controlled by second circuit control system.
3. wheel hub motor according to claim 2, it is characterised in that the first end of the stator is fixedly connected with first
Fagging, first gripper shoe are used for being fixedly connected automobile chassis；Second end of the stator is fixedly connected with the second gripper shoe,
Second gripper shoe carries out axial limiting to the internal rotor jointly with first gripper shoe.
4. wheel hub motor according to claim 3, it is characterised in that the internal rotor and the support shaft worn with internal rotor
It is fixedly connected, the two ends of the support shaft are connected with first gripper shoe and the second gripper shoe bearing respectively.
5. wheel hub motor according to claim 4, it is characterised in that the first end of the support shaft and the outer rotor is led to
Cross outer rotor connecting plate to be fixedly connected.
6. wheel hub motor according to claim 5, it is characterised in that the outer rotor connecting plate is fixedly connected with wheel hub.
7. wheel hub motor according to claim 4, it is characterised in that the second end of the outer rotor and described first supports
Board shaft holds connection.
8. the wheel hub motor according to any one of claim 1-7, it is characterised in that be provided with radiating dress on the outer rotor
Put.
9. a kind of electric automobile, it is characterised in that install just like the wheel hub motor described in any one of claim 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620845161.5U CN206004505U (en) | 2016-08-05 | 2016-08-05 | A kind of wheel hub motor and electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620845161.5U CN206004505U (en) | 2016-08-05 | 2016-08-05 | A kind of wheel hub motor and electric automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206004505U true CN206004505U (en) | 2017-03-08 |
Family
ID=58199901
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620845161.5U Expired - Fee Related CN206004505U (en) | 2016-08-05 | 2016-08-05 | A kind of wheel hub motor and electric automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206004505U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108482105A (en) * | 2018-05-22 | 2018-09-04 | 刘昱含 | Dynamoelectric and power generation integral type outer rotor hub unit and electric vehicle |
| CN109435676A (en) * | 2018-11-20 | 2019-03-08 | 同济大学 | A kind of double-rotor machine integrates the hub motor drive system of drum brake |
| CN110890823A (en) * | 2019-11-26 | 2020-03-17 | 常州市多维电器有限公司 | Motor and driving power assisting system |
-
2016
- 2016-08-05 CN CN201620845161.5U patent/CN206004505U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108482105A (en) * | 2018-05-22 | 2018-09-04 | 刘昱含 | Dynamoelectric and power generation integral type outer rotor hub unit and electric vehicle |
| CN109435676A (en) * | 2018-11-20 | 2019-03-08 | 同济大学 | A kind of double-rotor machine integrates the hub motor drive system of drum brake |
| CN110890823A (en) * | 2019-11-26 | 2020-03-17 | 常州市多维电器有限公司 | Motor and driving power assisting system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170308 Termination date: 20190805 |