CN207475376U - A kind of micro hollow cup brushed DC motor and robot - Google Patents
A kind of micro hollow cup brushed DC motor and robot Download PDFInfo
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- CN207475376U CN207475376U CN201721625635.6U CN201721625635U CN207475376U CN 207475376 U CN207475376 U CN 207475376U CN 201721625635 U CN201721625635 U CN 201721625635U CN 207475376 U CN207475376 U CN 207475376U
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Abstract
The utility model is suitable for technical field of motors, provide a kind of micro hollow cup brushed DC motor and robot, the micro hollow cup brushed DC motor includes casing, lid is located at the rear case component in the opening of casing one end, the drag cup winding assembly being set in casing, the permanent magnet being set in drag cup winding assembly, be set in permanent magnet and with the matched magnetic guiding loop of permanent magnet, the trombone slide being set in magnetic guiding loop, the machine shaft being set in trombone slide, and it is set in the bearing on machine shaft, one end of the machine shaft extends to rear case component, the other end is extended to outside casing.The phenomenon that magnetic guiding loop of the utility model by rationally designing permanent magnet and with its inner sleeve, elimination permanent magnet inside magnetic circuit saturation, enhance motor gas-gap magnetic flux density, improve motor torque ability, low-temperature-rise drops in raising efficiency；Meanwhile in the case where ensure that motor performance, permanent magnet dosage is reduced, reducing motor cost.
Description
Technical field
The utility model belongs to technical field of motors, more particularly to a kind of micro hollow cup brushed DC motor and machine
People.
Background technology
Existing micro hollow cup brushed DC motor, rotor are usually high performance sintered NdFeB annular permanent magnet
Body, permanent magnet inside are equipped with the thin stainless steel trombone slide of magnetic conduction, and bearing is housed in trombone slide, and passing through rotatable motor in bearing turns
Axis, there are air gaps between trombone slide and machine shaft.
The field circuit that permanent magnet is formed passes through trombone slide and machine shaft.But due to trombone slide thickness low LCL, and trombone slide with
The air gap of machine shaft is excessive, causes the saturation of magnetic circuit, results in magnetic circuit there are certain leakage field, i.e. magnetic circuit is
It is short-circuit by permanent magnet, form effective closed circuit without air gap.At this point, the magnetic flux density of motor gas-gap does not reach most
Good state.In addition, excessive use Nd-Fe-B permanent magnet, not only causes waste of material, motor cost greatly increases, and also results in
Motor torque poor performance, efficiency is low, warm raising.
Utility model content
The purpose of this utility model is to provide a kind of micro hollow cup brushed DC motors, it is intended to solve in the prior art
Motor cost it is high, torque performance is poor, efficiency is low and the technical issues of warm raising.
The utility model is realized in this way a kind of micro hollow cup brushed DC motor, is located at described including casing, lid
Rear case component in the opening of casing one end, is set in the drag cup at the drag cup winding assembly being set in the casing
Permanent magnet in winding assembly is set in the permanent magnet and magnetic guiding loop matched with the permanent magnet, is set in described lead
Trombone slide, the machine shaft being set in the trombone slide and the bearing being set on the machine shaft in magnet ring, the electricity
One end of machine shaft extends to the rear case component, and the other end is extended to outside the casing.
Further, the outer surface of the magnetic guiding loop and the inner surface of the permanent magnet are fitted close.
Further, the inner surface of the magnetic guiding loop and the outer surface of the trombone slide are fitted close.
Further, the axial length of the magnetic guiding loop is consistent with the axial length of the permanent magnet.
Further, the rear case component includes covering and sets rear cover over said opening and be arranged in the rear cover
The brush of side and extend to the pin on the outside of the rear cover.
Further, the rear cover is interference fitted with the casing.
Further, the drag cup winding assembly includes the drag cup winding being coaxially disposed with the casing, is arranged on
Commutator and the stent that is arranged on the rear case component on the inside of of the machine shaft close to one end of the rear case component.
Further, the axial length of the permanent magnet is less than the axial length of the drag cup winding, and the permanent magnetism
There is gap between body and the drag cup winding.
Further, the one end of the casing far from the opening is equipped with protrusion, and through-hole is offered in the protrusion, described
One end of trombone slide is extended in the through-hole, and the machine shaft passes through the through-hole.
The another object of the utility model is to provide a kind of robot have brush including micro hollow cup as described above
Direct current generator.
Implement a kind of micro hollow cup brushed DC motor and robot of the utility model, have the advantages that：
, by setting magnetic guiding loop between permanent magnet and trombone slide, magnetic guiding loop is coaxially disposed with permanent magnet and trombone slide for it, and magnetic guiding loop with forever
Magnet matches, i.e. the magnetic guiding loop by rationally designing permanent magnet and with its inner sleeve, on the inside of elimination permanent magnet the phenomenon that magnetic circuit saturation,
Enhance motor gas-gap magnetic flux density, improve motor torque ability, low-temperature-rise drops in raising efficiency；Meanwhile it ensure that motor performance
In the case of, permanent magnet dosage is reduced, reduces motor cost.
Description of the drawings
In order to illustrate more clearly of the technical scheme in the embodiment of the utility model, will make below to required in embodiment
Attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is only some embodiments of the utility model,
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings
Other attached drawings.
Fig. 1 is the sectional view for the micro hollow cup brushed DC motor that the utility model embodiment provides；
Fig. 2 is the configuration schematic diagram for the micro hollow cup brushed DC motor that the utility model embodiment provides.
Label involved by above-mentioned attached drawing is detailed as follows：
1- casings；11- protrusions；111- through-holes；2- rear case components；21- rear covers；22- brushes；23- pins；3- drag cups around
Group component；4- permanent magnets；5- magnetic guiding loops；6- trombone slides；7- machine shafts；8- bearings.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention is further described in detail.It should be appreciated that specific embodiment described herein is only explaining this
Utility model is not used to limit the utility model.
It should be noted that when component is referred to as " being fixed on " or " being set to " another component, it can directly or
It is connected on another component.When a component is referred to as " being connected to " another component, it can directly or indirectly be connected
It is connected on another component.
The orientation or position relationship of the instructions such as term " on ", " under ", "left", "right" are based on orientation shown in the drawings or position
Put relationship, be for only for ease of description rather than instruction imply signified device or element must have specific orientation, with
Specific azimuth configuration and operation, therefore it is not intended that limitation to this patent.Term " first ", " second " are used merely to facilitate
Purpose is described, and it is not intended that instruction or hint relative importance or the implicit quantity for indicating technical characteristic." multiples' "
It is meant that two or more, unless otherwise specifically defined.
As depicted in figs. 1 and 2, the utility model embodiment provide micro hollow cup brushed DC motor include casing 1,
Cover be located in the opening of 1 one end of casing rear case component 2, be set in casing 1 drag cup winding assembly 3, be set in it is hollow
Permanent magnet 4 in cup winding assembly 3, be set in permanent magnet 4 and with 4 matched magnetic guiding loop 5 of permanent magnet, be set in magnetic guiding loop 5
Interior trombone slide 6, the machine shaft 7 being set in trombone slide 6 and the bearing 8 being set on machine shaft 7.Wherein, casing 1, sky
Heart cup winding assembly 3, permanent magnet 4, magnetic guiding loop 5, trombone slide 6 and bearing 8 are coaxially disposed with machine shaft 7, casing 1, permanent magnet
4th, magnetic guiding loop 5 and trombone slide 6 are in interior hollow loop configuration.One end of machine shaft 7 extends to rear case component 2, and the other end prolongs
It extends to outside casing 1 and as output terminal.
The utility model embodiment between permanent magnet 4 and trombone slide 6 by setting magnetic guiding loop 5, magnetic guiding loop 5 and permanent magnet 4
It is coaxially disposed with trombone slide 6, and magnetic guiding loop 5 is matched with permanent magnet 4, i.e. the magnetic conduction by rationally designing permanent magnet 4 and with its inner sleeve
The phenomenon that ring 5, elimination 4 inside magnetic circuit saturation of permanent magnet, enhance motor gas-gap magnetic flux density, improve motor torque ability, promoted
Low-temperature-rise drops in efficiency；Meanwhile in the case where ensure that motor performance, permanent magnet dosage is reduced, reducing motor cost.
In one embodiment of the utility model, it is arranged between trombone slide 6 and machine shaft 7 there are two bearing 8, and two
A bearing 8 is respectively in the both ends of trombone slide 6.
Preferably, magnetic guiding loop 5 is fitted close with permanent magnet 4, i.e., gapless between magnetic guiding loop 5 and permanent magnet 4.Specifically,
The outer surface of magnetic guiding loop 5 is fitted close with the inner surface of permanent magnet 4.It is further preferred that magnetic guiding loop 5 is fitted close with trombone slide 6,
Gapless i.e. between magnetic guiding loop 5 and trombone slide 6.Specifically, the inner surface of magnetic guiding loop 5 and the outer surface of trombone slide 6 are fitted close.This
When, by the cooperation of magnetic guiding loop 5 and permanent magnet 4,4 inside leakage field of permanent magnet can be reduced, increase motor gas-gap flux density, permanent magnet 4
The maximum magnetic property in unit volume can have been given play to, motor torque ability and efficiency has been improved, reduces production cost.
Further, in one embodiment of the utility model, the axial length of magnetic guiding loop 5 and the axial direction of permanent magnet 4
Length is consistent, so that the overall structure of motor is compacter, while saves production cost.It is it is understood that new in this practicality
In the other embodiments of type, the axial length of magnetic guiding loop 5 can be slightly larger than or be slightly less than the axial length of permanent magnet 4.
Further, the rear case component 2 of the utility model embodiment includes rear cover 21, brush 22 and pin 23.Wherein, after
The lid of lid 21 is located in the opening of casing 1, and brush 22 is arranged on the inside of rear cover 21, and pin 23 extends to 21 outside of rear cover.At this
In embodiment, rear case component 2 includes a pair of of brush 22 and a pair of pins 23, and one of brush 22 corresponds to a pin 23, and
Brush 22 is electrically connected with pin 23, and brush 22 is electrically connected that (brush and pin are one by pin 23 and external dc power
Body).Preferably, rear cover 21 is interference fitted with casing 1 so that rear cover 21 is securely connect with casing 1.
Further, the drag cup winding assembly 3 of the utility model embodiment includes drag cup winding (not shown), commutation
Device (not shown) and stent (not shown).Wherein, drag cup winding is coaxially disposed with casing 1, and commutator is arranged on machine shaft 7
Close to one end of rear case component 2, stent is arranged in rear case component 2.In addition, the axial length of permanent magnet 4 be less than drag cup around
The axial length of group, and there is gap between permanent magnet 4 and drag cup winding, in the present embodiment, which is air gap.Directly
The electric energy in galvanic electricity source enters drag cup winding by brush 22 and commutator, generates electric current, the magnetic field that electric current generates and permanent magnet 4
Main field interaction generate electromagnetic torque, make machine shaft 7 rotation band dynamic load.
Further, the one end of casing 1 far from opening is provided with protrusion 11, through-hole 111 is offered in protrusion 11, it should
Through-hole 111 runs through casing 1, and one end of trombone slide 6 is extended in through-hole 111, and machine shaft 7 passes through through-hole 111 and extends outwardly.
The thickness and axial length of the magnetic guiding loop 5 of the utility model embodiment are maximum with motor gas-gap flux density average value, forever
For the purpose of 4 leakage field minimum of magnet, and then obtain a best torque performance；Meanwhile under conditions of irreversible demagnetization not occurring,
The dosage of permanent magnet 4 is minimum, and motor torque, efficiency and magnetic stability are consistent with conventional hollow cup brushed DC motor, and then
Obtain a least cost result.
It is understood that for different-thickness and the permanent magnet of axially different length 4, corresponding magnetic guiding loop 5 is most
Munificent degree and optimal axial length are also different.
Below with a a diameter of 17mm, the effect that the magnetic guiding loop 5 of permanent magnet 4 is brought is proved for the motor that outer diameter is 18mm
Fruit.First, the equivalent three-dimensional simulation model of conventional hollow cup motor is established, wherein ignore all non-magnetic components in motor,
Only the casing of magnetic conduction 1, machine shaft 7, trombone slide 6 and permanent magnet 4 are emulated, do not implemented at this time using the utility model
The magnetic guiding loop 5 of example.By simulation result it is found that the magnetic flux density of motor trombone slide 6 is largely more than 2.0T, it has been in completely full
And state；Meanwhile 4 inside of permanent magnet extends only through the leakage magnetic flux of itself in the presence of part,.Secondly, using the utility model embodiment
Magnetic guiding loop 5 redesigned, by simulation result it is found that magnetic guiding loop 5 and 6 local maxima flux density of trombone slide are 2.0T, do not occur
Saturated phenomenon, for motor specific magnetic loading to increase by 5.49%, 4 dosage of permanent magnet reduces 30.3%.
In conclusion the micro hollow cup brushed DC motor of the utility model embodiment solves conventional hollow cup and has brush
Existing for motor the problem of 4 inside magnetic circuit saturation of permanent magnet, motor gas-gap flux density can be increased, improve magnetic loading, enhanced
Torque output performance improves electric efficiency, drops low-temperature-rise；Meanwhile do not increase complicated assembly technology, reduce permanent magnet 4 and use
Amount, substantially reduces production cost.
The utility model embodiment additionally provides a kind of robot, has brush directly including micro hollow cup as described above
Galvanic electricity machine.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
All any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in the utility model
Protection domain within.
Claims (10)
1. a kind of micro hollow cup brushed DC motor, which is characterized in that the opening of described casing one end is located at including casing, lid
On rear case component, be set in the casing drag cup winding assembly, be set in the drag cup winding assembly forever
Magnet is set in the permanent magnet and magnetic guiding loop matched with the permanent magnet, the trombone slide being set in the magnetic guiding loop, set
The machine shaft being located in the trombone slide and the bearing being set on the machine shaft, one end of the machine shaft are prolonged
The rear case component is extended to, the other end is extended to outside the casing.
2. micro hollow cup brushed DC motor as described in claim 1, which is characterized in that the outer surface of the magnetic guiding loop with
The inner surface of the permanent magnet is fitted close.
3. micro hollow cup brushed DC motor as described in claim 1, which is characterized in that the inner surface of the magnetic guiding loop with
The outer surface of the trombone slide is fitted close.
4. micro hollow cup brushed DC motor as described in claim 1, which is characterized in that the axial length of the magnetic guiding loop
It is consistent with the axial length of the permanent magnet.
5. such as Claims 1-4 any one of them micro hollow cup brushed DC motor, which is characterized in that the rear cover group
Part includes lid and sets rear cover over said opening and the brush being arranged on the inside of the rear cover and extend on the outside of the rear cover
Pin.
6. micro hollow cup brushed DC motor as claimed in claim 5, which is characterized in that the rear cover and the casing mistake
It is full of cooperation.
7. such as Claims 1-4 any one of them micro hollow cup brushed DC motor, which is characterized in that the drag cup
Winding assembly includes the drag cup winding being coaxially disposed with the casing, is arranged on the machine shaft close to the rear case component
One end commutator and the stent that is arranged on the inside of the rear case component.
8. micro hollow cup brushed DC motor as claimed in claim 7, which is characterized in that the axial length of the permanent magnet
Less than the axial length of the drag cup winding, and there is gap between the permanent magnet and the drag cup winding.
9. micro hollow cup brushed DC motor as described in claim 1, which is characterized in that the casing is far from the opening
One end be equipped with protrusion, it is described protrusion in offer through-hole, one end of the trombone slide is extended in the through-hole, the motor turn
Axis passes through the through-hole.
10. a kind of robot, which is characterized in that including micro hollow cup brushed DC as described in any one of claim 1 to 9
Motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721625635.6U CN207475376U (en) | 2017-11-28 | 2017-11-28 | A kind of micro hollow cup brushed DC motor and robot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721625635.6U CN207475376U (en) | 2017-11-28 | 2017-11-28 | A kind of micro hollow cup brushed DC motor and robot |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207475376U true CN207475376U (en) | 2018-06-08 |
Family
ID=62259164
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721625635.6U Active CN207475376U (en) | 2017-11-28 | 2017-11-28 | A kind of micro hollow cup brushed DC motor and robot |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207475376U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107800259A (en) * | 2017-11-28 | 2018-03-13 | 深圳市优必选科技有限公司 | A kind of micro hollow cup brushed DC motor and robot |
| CN110277865A (en) * | 2019-06-18 | 2019-09-24 | 深圳市优必选科技股份有限公司 | Hollow cup brush direct current motor and robot |
| CN110311524A (en) * | 2019-06-18 | 2019-10-08 | 深圳市优必选科技股份有限公司 | Hollow cup brushless direct current motor and robot |
-
2017
- 2017-11-28 CN CN201721625635.6U patent/CN207475376U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107800259A (en) * | 2017-11-28 | 2018-03-13 | 深圳市优必选科技有限公司 | A kind of micro hollow cup brushed DC motor and robot |
| CN110277865A (en) * | 2019-06-18 | 2019-09-24 | 深圳市优必选科技股份有限公司 | Hollow cup brush direct current motor and robot |
| CN110311524A (en) * | 2019-06-18 | 2019-10-08 | 深圳市优必选科技股份有限公司 | Hollow cup brushless direct current motor and robot |
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