CN208078817U - Electric wheelchair wheel hub motor - Google Patents
Electric wheelchair wheel hub motor Download PDFInfo
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- CN208078817U CN208078817U CN201820391294.9U CN201820391294U CN208078817U CN 208078817 U CN208078817 U CN 208078817U CN 201820391294 U CN201820391294 U CN 201820391294U CN 208078817 U CN208078817 U CN 208078817U
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Abstract
The utility model discloses a kind of electric wheelchair wheel hub motors, include and the fixed big axis of Wheelchair support, the hub body that is assemblied on big axis of rotation and sets motor body and planetary gear speed reducing mechanism in the inner, motor body includes being sequentially connected through planetary gear speed reducing mechanism and the ring gear on hub body inner wall with the fixed motor housing of big axis, the stator and rotor in it and the output revolving shaft that motor housing is fixed and stretched out with rotor, the output revolving shaft；It further include built-in electromagnetic brake apparatus, the device includes the armature disc, the first frictional disk and the second frictional disk being set in turn in an axial direction between big axis inner end and motor housing, first frictional disk is non-metallic friction disk, is fixed on output revolving shaft, and the second frictional disk is fixed with motor housing；Further include being set to elastic mechanism opposite with electromagnetic attraction direction with the restraining coil of armature disc electromagnetic attraction and elastic force direction on big axis inner end.The utility model not only volume compact, work efficiency is high, and can efficiently brake.
Description
Technical field
The utility model is related to a kind of electric wheelchair wheel hub motors.
Background technology
The driving device of conventional electric wheelchair mostly uses brushed DC motor by shaft transmission come driving wheel at present
The shortcomings that shaft rotation is dynamic, this covering device is that volume is big, weight weight, and it is low and too fat to move to be mounted on execution efficiency on wheelchair.On the other hand go out
In the driving safety the considerations of, the brake portion of electric wheelchair usually not parking brake of fitting machine tool formula, but use special
Electromagnetic brake.This electromagnetic brake is typically assembled on shaft transmission, further increases device volume and weight.
Wheel hub motor is to use more extensive driving part on electric bicycle at present, has reduction ratio big, volume
Small advantage.Such motor also has the tendency that being designed to be applied on electric wheelchair, but meets with following technical problem：Electrical salf-walking
Wheel hub motor generally use clutch and cooperative mechanical braking mechanism on vehicle realize brake, but the crowd due to doing electric wheelchair
It is mostly handicapped, it can not guarantee reliably to operate mechanical brake mechanism, therefore cause electric bicycle hub motor
Brake system is removed to being not appropriate on electric wheelchair.Therefore new commutable scheme is must take into consideration to realize electric wheelchair wheel hub
The efficient braking of motor.
Invention content
The utility model aim is：A kind of electric wheelchair wheel hub motor is provided, not only volume compact, work efficiency is high,
And it can efficiently brake.
The technical solution of the utility model is：A kind of electric wheelchair wheel hub motor, including with the fixed big axis of Wheelchair support,
It is assemblied in the hub body on big axis and the motor body in hub body and planetary reducer by the rotation of big axle bearing
Structure, the motor body include and the fixed motor housing in the inner end of big axis, the stator and rotor in motor housing and and rotor
Output revolving shaft that is fixed and stretching out motor housing, the output revolving shaft through planetary gear speed reducing mechanism on hub body inner wall in
Gear ring is sequentially connected；Characterized by further comprising the built-in electromagnetic brake apparatus between big axis and motor body, should
Device includes the armature disc being set in turn in an axial direction between big axis inner end and motor housing, the first frictional disk and the second friction
Disk, the first frictional disk are non-metallic friction disk, are fixed on output revolving shaft, and the second frictional disk is fixed with motor housing；Also
Include opposite with electromagnetic attraction direction with the restraining coil of armature disc electromagnetic attraction and elastic force direction on big axis inner end
Elastic mechanism.
Further, the inner end of big axis described in this practicality newly is equipped with groove and the coil slot around groove, elastic mechanism
In groove, and restraining coil is then wound in coil slot.
Further, elastic mechanism described in the utility model includes the first spring and pressing sleeve, and the first spring is placed on pressure
Set periphery, and pressing sleeve offsets with the armature disc.
More preferably, the utility model further includes release screw bolt, and the big axis shaft core position is equipped with and is worn for release screw bolt
The bolt hole crossed, the bolt hole are penetrated through with the groove, and the pressing sleeve is equipped with the threaded hole coordinated with release screw bolt, the solution
It screws in threaded hole after lock bolt passing through bolt hole and is fixed with pressing sleeve.The design of release screw bolt has following functional：Work as braking
The electromagnetic attraction of coil fails（It damages or is unable to control）In the case of, in order to reduce the implementation resistance of electric wheelchair, Wo Menke
Pressing sleeve is driven to be displaced outwardly certain interval against the elastic force of the first spring in a manner of by screwing out release screw bolt outward, to
Reduce the frictional force between two frictional disks to reduce the rotary resistance of output revolving shaft.
More preferably, further include for preventing release screw bolt from reversing the second spring that loosens in the utility model, this
Two springs are pushed against between the top of release screw bolt and threaded hole inner wall；Or the big axis outer end be equipped with inner order opening, second
Spring is pushed against between the bolt head of release screw bolt and the wall of inner order opening.During the long-time service of the utility model, by two
Frictional disk transmits the effect of torque, and relative rotation is will produce between pressing sleeve and release screw bolt and release screw bolt is caused to loosen, and the
The design of two springs can prevent release screw bolt from being rotated relative to pressing sleeve, give mechanism better job stability.
Further, further include attaching nut for fixing the first frictional disk in the utility model, in the attaching nut
The heart is equipped with rotation stop hole, and rotation stop hole is polygonal hole, and the output revolving shaft is equipped with and the matched rotation stop of polygonal hole shape
Section or the rotation stop hole coordinate rotation stop with output revolving shaft by keyway；The radial direction of the attaching nut is equipped with positioning through hole, uses
In hammering into screw so that attaching nut to be locked on output revolving shaft, first friction disk center is equipped with and attaching nut's outer profile
Matched hole, and be locked on attaching nut by the hole.
Further, planetary gear speed reducing mechanism described in the utility model and big axis are located at motor housing both ends.
Further, in the utility model hub body include hub shell and with the fixed hub end of hub shell
Lid, hub shell by big axle bearing rotating dress assigned on big axis, further include with the fixed small axis of motor housing, wheel hub end housing by
By small axle bearing rotating dress assigned on small axis, the ring gear is fixed on wheel hub end housing；The output revolving shaft of the motor body
For long tooth shaft, the planetary gear speed reducing mechanism include it is several with the planetary gear of the axis tooth engagement in long tooth shaft, it is corresponding be fixed on it is each
The planet stent of short tooth axis and integrated molding on small axis on planetary gear, short tooth axis are assemblied in by the rotation of short tooth axle bearing
On planet stent, the axis tooth on short tooth axis is engaged with ring gear；And it is fixed with mold insert in each planetary centre bore, the edge
Part is equipped with coordinates fixed connecting hole with short tooth shaft key groove.The introducing of mold insert can improve the strong of planetary gear torque transmission
Degree, enhances the job stability of mechanism.
More preferably, motor body uses internal rotor external stator configuration in the utility model, and motor housing includes phase
Mutual fixed front motor cover and motor rear cover, the stator and front motor cover and motor rear cover are all fixed, the inner end of the big axis
Fixed with motor rear cover, and small axis is fixed with front motor cover, between the long tooth shaft and front motor cover and motor rear cover by
Long tooth axle bearing rotating dress is matched.
Further, the second frictional disk described in the utility model is metal friction disk.
Need to illustrate the non-metallic friction disk in the utility model can be plastic friction disk, rubber friction disk or other one
Frictional disk made of a little well known nonmetallic materials, metal friction disk then usually select friction rail disk.
The utility model is related to this electric wheelchair wheel hub motor, restraining coil and electric wheelchair when specifically used
Controller electrical connection, which connects the stator coil of motor body simultaneously.And brake power-off switch is connected on controller,
When the brake power-off switch is pressed, motor body and restraining coil all can dead electricity.
Concrete operating principle is：
1）When electric wheelchair normally starts, the stator coil in motor body obtains electric-driven rotor rotation, and then by defeated
Go out shaft and planetary gear speed reducing mechanism drives hub operation so that electric wheelchair moves ahead, during wheelchair moves ahead, at restraining coil
It in obtaining electricity condition, generates electromagnetic attraction and attracts armature disc so that the first frictional disk and the second frictional disk are spaced apart, do not interfere
Rotor operates.
）When an emergency situation is encountered needs brake, patient presses brake power-off switch on hand, and controller, which sends out signal, to be made
Stator coil and the equal dead electricity of restraining coil are obtained, restraining coil eliminates the electromagnetic attraction of armature disc at this time, and armature disc is in elasticity
It is ejected under the action of mechanism, the first frictional disk is pressed on the second frictional disk, make output revolving shaft by the effect of frictional force
It stops operating with rotor, to realize the braking of wheelchair.
The utility model has the advantages that：
1. the utility model is specially designed to the wheel hub motor on electric wheelchair, wheel hub motor reduction ratio is inherited
Greatly, small advantage, not only volume compact, work efficiency is high, and can realize height by built-in electromagnetic brake apparatus
Effect braking.
The built-in electromagnetic brake apparatus in the utility model takes full advantage of big axis internal end surface and big axis and electricity
Space between machine shell, it is compact-sized, the volume of entire wheel hub motor can be reduced, and easy to process.
The built-in electromagnetic brake apparatus in the utility model, a combination thereof with restraining coil, elastic mechanism, armature disc,
The braking of first frictional disk and the second frictional disk these components realization wheelchair in the power-off state, parts are few, are simple to manufacture, but
It is stable and reliable in work.
The built-in electromagnetic brake apparatus in the utility model, also further devises release screw bolt, when restraining coil
Electromagnetic attraction fails（It damages or is unable to control）In the case of, in order to reduce the implementation resistance of electric wheelchair, we can pass through
Pressing sleeve is driven to be displaced outwardly certain interval against the elastic force of the first spring the mode that release screw bolt screws out outward, to reduce two
Frictional force between a frictional disk is to reduce the rotary resistance of output revolving shaft.
The second spring loosened for preventing release screw bolt from reversing has also been devised in the utility model, it is more preferable to give mechanism
Job stability.
Description of the drawings
The utility model is further described with reference to the accompanying drawings and embodiments：
Fig. 1 is the structure principal section figure of the utility model.
Wherein：1, hub shell；2, big axis；2a, groove；2b, bolt hole；3, release screw bolt；4, big axle bearing；5, first
Spring；6, pressing sleeve；6a, threaded hole；7, second spring；8, armature disc；9, the first frictional disk；10, attaching nut；11, it second rubs
Wipe disk；12, motor rear cover；13, rotor；14, stator；15, front motor cover；16, small axis；17, ring gear；18, wheel hub end housing；
19, small axle bearing；20, long tooth shaft；21, short tooth axis；22, short tooth axle bearing；23, planetary gear；24, long tooth axle bearing；25, it makes
Moving winding；26, mold insert.
Specific implementation mode
Embodiment：In conjunction with shown in Fig. 1 to this electric wheelchair wheel hub motor provided by the utility model elaborate as
Under：
This electric wheelchair wheel hub motor has with the fixed big axis 2 of Wheelchair support, is assemblied in by the rotation of big axle bearing 4
Hub body on big axis 2 and the motor body in hub body and planetary gear speed reducing mechanism, the motor body include with
It the fixed motor housing in inner end of big axis 2, the stator and rotor 14,13 in motor housing and is fixed with rotor 13 and stretches out electricity
The output revolving shaft of machine shell, which, which is driven through planetary gear speed reducing mechanism with the ring gear 17 on hub body inner wall, connects
It connects.
Specifically, as shown in Figure 1, hub body described in the present embodiment includes hub shell 1 and is fixed with hub shell 1
Wheel hub end housing 18, hub shell 1 further includes fixed small with motor housing assigned on big axis 2 by 4 rotating dress of big axle bearing
Axis 16, for wheel hub end housing 18 by 19 rotating dress of small axle bearing assigned on small axis 16, the ring gear 17 is fixed on wheel hub end housing 18
On；The output revolving shaft of the motor body is long tooth shaft 20, and the planetary gear speed reducing mechanism includes several axis in long tooth shaft 20
The row of the planetary gear 23 of tooth engagement, the corresponding short tooth axis 21 being fixed on each planetary gear 23 and integrated molding on small axis 16
Prong frame, short tooth axis 21 are assemblied in by the rotation of short tooth axle bearing 22 on planet stent, the axis tooth on short tooth axis 21 and ring gear
17 engagements.And mold insert 26 is fixed in the present embodiment in the centre bore of each planetary gear 23, which is equipped with and short tooth
21 keyway of axis coordinates fixed connecting hole.Planetary gear 23 is made of plastics, and mold insert 26 is metalwork, 26 outside diverging of mold insert
Several keys are formed with the slot in 23 centre bore of planetary gear to coordinate with fixation.The introducing of mold insert 26 can improve planetary gear 23
The intensity that torque transmits, enhances the job stability of mechanism.
Planetary gear speed reducing mechanism described in the present embodiment and big axis 2 are located at motor housing both ends.The motor body is adopted
With internal rotor external stator configuration, motor housing includes the front motor cover 15 being fixed to each other and motor rear cover 12, the stator 14
All fixed with front motor cover 15 and motor rear cover 12, inner end and the motor rear cover 12 of the big axis 2 are fixed, and small axis 16 and motor
Protecgulum 15 is fixed, by 24 rotating dress of long tooth axle bearing between the long tooth shaft 20 and front motor cover 15 and motor rear cover 12
Match.
The emphasis improvement of the utility model is：In big axis 2 and motor body（Motor rear cover 12）Between be mounted with it is built-in
Formula electro-magnetic braking device, the device include the armature disc 8 being set in turn in an axial direction between 2 inner end of big axis and motor housing,
One frictional disk 9 and the second frictional disk 11, the first frictional disk 9 are plastic friction disk, are fixed on long tooth shaft 20 and stretch out motor rear cover
On 12 one end, and the second frictional disk 11 is friction rail disk, is fixed with 12 outer surface of motor rear cover；Further include being set to big axis 2
The elastic mechanism opposite with electromagnetic attraction direction with the restraining coil 25 of 8 electromagnetic attraction of armature disc and elastic force direction on inner end.
It specifically combines shown in Fig. 1, the inner end of big axis 2 described in the present embodiment is equipped with groove 2a and the coil around groove 2a
Slot（It is not marked on figure）, elastic mechanism is set in groove 2a, and restraining coil 25 is then wound in coil slot.The elastic mechanism
It is made of the first spring 5 and pressing sleeve 6, the first spring 5 is placed on 6 periphery of pressing sleeve, and pressing sleeve 6 offsets with the armature disc 8.
Release screw bolt 3 and second spring 7 are also devised in the utility model, 2 shaft core position of big axis is equipped with for unlock
The bolt hole 2b that bolt 3 passes through, bolt hole 2b are penetrated through with the groove 2a, and the pressing sleeve 6 is equipped with to be coordinated with release screw bolt 3
Threaded hole 6a, the release screw bolt 3 passes through to screw in threaded hole 6a after bolt hole 2b and be fixed with pressing sleeve 6.The second spring 7
Be designed to prevent release screw bolt 3 from reversing the second spring 7 loosened, the second spring 7 be pushed against release screw bolt 3 top and
Between threaded hole 6a inner walls.When the electromagnetic attraction of restraining coil 25 fails（It damages or is unable to control）In the case of, in order to reduce
The implementation resistance of electric wheelchair, we can drive pressing sleeve 6 against the first spring by way of screwing out release screw bolt 3 outward
5 elastic force is displaced outwardly certain interval, to reduce the frictional force between two frictional disks 9,11 to reduce turning for output revolving shaft
Dynamic resistance.And the design of second spring 7 can prevent release screw bolt 3 from being rotated relative to pressing sleeve 6, give mechanism better the operation is stable
Property.
Further include the attaching nut 10 for fixing the first frictional disk 9 in the present embodiment, which is equipped with
Rotation stop hole, rotation stop hole are polygonal hole（It is hexagonal hole in the present embodiment）, and the output revolving shaft is equipped with and the polygon
The matched rotation stop section of hole shape；The radial direction of the attaching nut 10 is equipped with positioning through hole（It is not drawn into figure）, for hammering into screw
（It is not drawn into figure）Attaching nut 10 to be locked on output revolving shaft, 9 center of the first frictional disk is equipped with and attaching nut
10 outer profiles（Hexagon）Matched hole, and be locked on attaching nut 10 by the hole.
The utility model is related to this electric wheelchair wheel hub motor, restraining coil 25 and Electric Motor Wheel when specifically used
The controller of chair is electrically connected, which connects 14 coil of stator of motor body simultaneously.And brake power-off is connected on controller
Switch, when which presses, motor body and restraining coil 25 all can dead electricity.
Concrete operating principle is：
1）When electric wheelchair normally starts, 14 coil of stator in motor body obtains electric-driven rotor rotation, and then passes through
Long tooth shaft 20 and planetary gear speed reducing mechanism drive hub operation so that and electric wheelchair moves ahead, during wheelchair moves ahead, restraining coil
25 are in obtain electricity condition, generate electromagnetic attraction and attract armature disc 8 so that the interval of the first frictional disk 9 and the second frictional disk 11
It opens, rotor 13 is not interfered to operate.
）When an emergency situation is encountered needs brake, patient presses brake power-off switch on hand, and controller, which sends out signal, to be made
25 equal dead electricity of 14 coil of stator and restraining coil is obtained, restraining coil 25 eliminates the electromagnetic attraction of armature disc 8 at this time, armature disc
8 eject under the action of elastic mechanism, and the first frictional disk 9 is pressed on the second frictional disk 11, is made by the effect of frictional force
It obtains long tooth shaft 20 and rotor 13 stops operating, to realize the braking of wheelchair.
Certain above-described embodiment is only the technical concepts and features for illustrating the utility model, and its object is to allow be familiar with this
The people of technology can understand the content of the utility model and implement according to this, and the protection model of the utility model can not be limited with this
It encloses.Any modifications made in accordance with the spirit of the main technical solutions of the utility model should all cover the guarantor in the utility model
Within the scope of shield.
Claims (10)
1. a kind of electric wheelchair wheel hub motor, including with the fixed big axis of Wheelchair support（2）, by big axle bearing（4）Rotating dress
Fit over big axis（2）On hub body and the motor body in hub body and planetary gear speed reducing mechanism, the motor body
Including with big axis（2）The fixed motor housing in inner end, the stator and rotor in motor housing（14,13）And and rotor（13）
Output revolving shaft that is fixed and stretching out motor housing, the output revolving shaft through planetary gear speed reducing mechanism on hub body inner wall in
Gear ring（17）It is sequentially connected；Characterized by further comprising mounted on big axis（2）Built-in electromagnetic braking between motor body
Device, the device include being set in turn in big axis in an axial direction（2）Armature disc between inner end and motor housing（8）, first friction
Disk（9）With the second frictional disk（11）, the first frictional disk（9）For non-metallic friction disk, it is fixed on output revolving shaft, and second rubs
Wipe disk（11）It is fixed with motor housing；Further include being set to big axis（2）On inner end with armature disc（8）The restraining coil of electromagnetic attraction
（25）And the elastic mechanism that elastic force direction is opposite with electromagnetic attraction direction.
2. electric wheelchair wheel hub motor according to claim 1, it is characterised in that the big axis（2）Inner end be equipped with groove
（2a）And around groove（2a）Coil slot, elastic mechanism be set to groove（2a）It is interior, and restraining coil（25）Then it is wound on coil
In slot.
3. electric wheelchair wheel hub motor according to claim 2, it is characterised in that the elastic mechanism includes the first spring
（5）And pressing sleeve（6）, the first spring（5）It is placed on pressing sleeve（6）Periphery, and pressing sleeve（6）With the armature disc（8）It offsets.
4. electric wheelchair wheel hub motor according to claim 3, it is characterised in that further include release screw bolt（3）, described big
Axis（2）Shaft core position is equipped with for release screw bolt（3）The bolt hole passed through（2b）, the bolt hole（2b）With the groove（2a）It passes through
It is logical, the pressing sleeve（6）It is equipped with and release screw bolt（3）The threaded hole of cooperation（6a）, the release screw bolt（3）Across bolt hole
（2b）After screw in threaded hole（6a）Interior and pressing sleeve（6）It is fixed.
5. electric wheelchair wheel hub motor according to claim 4, it is characterised in that further include for preventing release screw bolt（3）
Reverse the second spring loosened（7）, the second spring（7）It is pushed against release screw bolt（3）Top and threaded hole（6a）Inner wall it
Between；Or in the big axis（2）Outer end is equipped with inner order opening, second spring（7）It is pushed against release screw bolt（3）Bolt head and interior rank
Between the wall in hole.
6. electric wheelchair wheel hub motor according to claim 1, it is characterised in that further include for fixing the first frictional disk
（9）Attaching nut（10）, the attaching nut（10）Center is equipped with rotation stop hole, and rotation stop hole is polygonal hole, and the output turns
Axis is equipped with to be stopped with output revolving shaft by keyway cooperation with the matched rotation stop section of the polygonal hole shape or the rotation stop hole
Turn；The attaching nut（10）Radial direction be equipped with positioning through hole, for hammering into screw with by attaching nut（10）It is locked at output
In shaft, first frictional disk（9）Center is equipped with and attaching nut（10）The matched hole of outer profile, and be locked by the hole
Attaching nut（10）On.
7. electric wheelchair wheel hub motor according to claim 1, it is characterised in that the planetary gear speed reducing mechanism and big axis（2）
It is located at motor housing both ends.
8. electric wheelchair wheel hub motor according to claim 7, it is characterised in that hub body includes hub shell（1）With
With hub shell（1）Fixed wheel hub end housing（18）, hub shell（1）By big axle bearing（4）Rotating dress is assigned in big axis（2）
On, further include and the fixed small axis of motor housing（16）, wheel hub end housing（18）By small axle bearing（19）Rotating dress is assigned in small axis
（16）On, the ring gear（17）It is fixed on wheel hub end housing（18）On；The output revolving shaft of the motor body is long tooth shaft（20）,
The planetary gear speed reducing mechanism includes several and long tooth shaft（20）On axis tooth engagement planetary gear（23）, correspondence be fixed on each row
Star gear（23）On short tooth axis（21）With integrated molding in small axis（16）On planet stent, short tooth axis（21）Pass through short tooth axis
Bearing（22）Rotation is assemblied on planet stent, short tooth axis（21）On axis tooth and ring gear（17）Engagement；And each planet tooth
Wheel（23）Centre bore in be fixed with mold insert（26）, the mold insert（26）It is equipped with and short tooth axis（21）Keyway coordinates fixed connection
Hole.
9. electric wheelchair wheel hub motor according to claim 8, it is characterised in that motor body uses internal rotor external stator
Configuration, motor housing include the front motor cover being fixed to each other（15）And motor rear cover（12）, the stator（14）Before motor
Lid（15）And motor rear cover（12）It is all fixed, the big axis（2）Inner end and motor rear cover（12）It is fixed, and small axis（16）With electricity
Machine protecgulum（15）It is fixed, the long tooth shaft（20）With front motor cover（15）And motor rear cover（12）Between by long tooth axle bearing
（24）Rotating dress is matched.
10. electric wheelchair wheel hub motor according to claim 1, it is characterised in that second frictional disk（11）For metal
Frictional disk.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820391294.9U CN208078817U (en) | 2018-03-22 | 2018-03-22 | Electric wheelchair wheel hub motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820391294.9U CN208078817U (en) | 2018-03-22 | 2018-03-22 | Electric wheelchair wheel hub motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208078817U true CN208078817U (en) | 2018-11-09 |
Family
ID=64046519
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820391294.9U Active CN208078817U (en) | 2018-03-22 | 2018-03-22 | Electric wheelchair wheel hub motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208078817U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108270318A (en) * | 2018-03-22 | 2018-07-10 | 苏州雄大电机有限公司 | Electric wheelchair wheel hub motor |
-
2018
- 2018-03-22 CN CN201820391294.9U patent/CN208078817U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108270318A (en) * | 2018-03-22 | 2018-07-10 | 苏州雄大电机有限公司 | Electric wheelchair wheel hub motor |
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