CN108923583A - A kind of brushless motor - Google Patents
A kind of brushless motor Download PDFInfo
- Publication number
- CN108923583A CN108923583A CN201811049237.3A CN201811049237A CN108923583A CN 108923583 A CN108923583 A CN 108923583A CN 201811049237 A CN201811049237 A CN 201811049237A CN 108923583 A CN108923583 A CN 108923583A
- Authority
- CN
- China
- Prior art keywords
- fan blade
- central spindle
- brushless motor
- hole
- knurling portion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
- H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
The invention discloses a kind of brushless motors, it includes stator module, the rotor assembly being set in the stator module and the fan blade being fixed in the central spindle of the rotor assembly, a straight grain knurled portions are formed in the central spindle, the through-hole of the fan blade and the straight knurling portion are interference fitted so that the fan blade is fixed in the central spindle.Compared with prior art, straight knurling portion is formed in the central spindle of brushless motor of the present invention, and the through-hole of fan blade and the straight knurling portion are interference fitted so that the fan blade is fixed in the central spindle in the brushless motor, pass through the interference fit of fan blade and straight knurling portion, it can prevent the radial rotary of fan blade, fan blade is effectively avoided to generate axial displacement, to prevent fan blade from falling off from central spindle, to improve motor job stability.
Description
Technical field
The present invention relates to technical field of motors, relate more specifically to a kind of brushless motor.
Background technique
Motor is a kind of calutron that electric energy conversion or transmitting are realized according to the law of electromagnetic induction, its effect is to generate
Driving torque, as electrical appliance or the power source of various machinery.And brushless motor is to realize electricity using semiconductor switch device
The motor of son commutation, i.e., replace traditional contact commutator and brush, so that it makes an uproar with no machinery with electronic switching device
Sound, service life be long, can high speed rotation, the advantages that precision is high and easy to control.Brushless motor is usually equipped with one in the end of its central spindle
Fan blade when motor operates, can release amount of heat under rotor high-speed rotation, fan blade can play the role of air discharging and radiating.At present
In order to which fan blade to be fixed in central spindle, it usually is internally embedded powder metallurgy axle sleeve in fan blade, is matched by the interference of axle sleeve and central spindle
It closes to realize the installation of fan blade and central spindle, but would generally cause to assemble bad problem, and rotor because of scale error between the two
High-speed rotation when work, fan blade may be relatively rotated with central spindle, so that fan blade generates axial displacement, motor works long hours can
Fan blade can be caused to fall off from central spindle, so that there are security risks for motor.
In consideration of it, it is necessary to provide one kind can prevent fan blade from falling off to improve the brushless motor of job stability to solve
Drawbacks described above.
Summary of the invention
Technical problem to be solved by the invention is to provide one kind can prevent fan blade from falling off to improve job stability
Brushless motor.
In order to solve the above technical problems, the present invention provides a kind of brushless motor comprising have stator module, be set to it is described
Rotor assembly in stator module and the fan blade being fixed in the central spindle of the rotor assembly are formed with always in the central spindle
Line knurled portions, the through-hole of the fan blade and the straight knurling portion are interference fitted so that the fan blade is fixed in the central spindle.
Its further technical solution is：Multiple axial protrusions are formed at the through-hole wall of the fan blade.
Its further technical solution is：The outer diameter in the straight knurling portion is identical with the diameter of axle of central spindle.
Its further technical solution is：The rotor assembly includes a cylindrical housings, a central spindle and multiple magnet, institute
It states and offers a plurality of cavities in circular cylindrical shell body, each magnet is set in a cavity, and the central spindle runs through the cylindrical housings,
And the straight knurling portion is set to end thereafter.
Its further technical solution is：The rotor assembly further includes having drive end bearing bracket and rear end cap, the drive end bearing bracket and after
End cap is covered on the cylindrical housings front end face and rear end face respectively.
Its further technical solution is：The magnet is thin slice permanent magnet.
Its further technical solution is：The stator module includes shell, stator core, upper bearing (metal) and lower bearing, described
Stator core is set in the shell, multiple equally distributed stator salient poles is formed on the stator core inner peripheral surface, each
Be wound with coil in the stator salient poles, the rotor assembly by upper bearing (metal) and lower bearing and cage connection, the central spindle according to
It is secondary to run through shell, upper bearing (metal), fan blade, cylindrical housings and lower bearing.
Its further technical solution is：The fan blade includes a discshaped body and multiple upper tables from the discshaped body
The flabellum that face extends out, the center position of the discshaped body upper surface are equipped with a rotary table, and multiple flabellums are around institute
It states rotary table and radially distributes, and the discshaped body lower surface corresponds at the rotary table equipped with a column, the through-hole
On the rotary table and column.
Its further technical solution is：The through-hole successively includes the first circular hole, the second circular hole and third circular hole, described
The diameter of first circular hole is identical as the diameter of third circular hole, and has a diameter larger than the diameter of the second circular hole, and the central spindle wears institute
It states through-hole and the straight knurling portion is set in second circular hole.
Its further technical solution is：The fan blade is made of plastic cement.
Compared with prior art, straight knurling portion is formed in the central spindle of brushless motor of the present invention, and in the brushless motor
The through-hole of fan blade and the straight knurling portion are interference fitted so that the fan blade is fixed in the central spindle, passes through fan blade and straight grain
The interference fit of knurled portions can prevent the radial rotary of fan blade, effectively avoid fan blade generate axial displacement, thus prevent fan blade from
It falls off in central spindle, to improve motor job stability.
Detailed description of the invention
Fig. 1 is the decomposition texture schematic diagram of one specific embodiment of brushless motor of the present invention.
Fig. 2 is the schematic perspective view after the assembling of brushless motor shown in Fig. 1.
Fig. 3 be brushless motor shown in Fig. 2 A-A to schematic cross-sectional view.
Fig. 4 is the schematic elevation view of central spindle in brushless motor shown in Fig. 2.
Fig. 5 is the schematic cross-sectional view of the B-B direction of central spindle shown in Fig. 4.
Fig. 6 is the schematic top plan view of fan blade in brushless motor shown in Fig. 2.
Fig. 7 be fan blade shown in Fig. 6 C-C to schematic cross-sectional view.
Fig. 8 is the schematic top plan view of stator core in brushless motor shown in Fig. 2.
Specific embodiment
To make those skilled in the art that the object, technical solutions and advantages of the present invention be more clearly understood, with
Under the application is further elaborated in conjunction with the accompanying drawings and embodiments.
Referring to Fig. 1 to Fig. 8, Fig. 1 to Fig. 8 illustrates a specific embodiment of brushless motor 1 of the present invention.It is clearer aobvious
Show that rotor assembly, Fig. 1 stator module into Fig. 3 are not shown, in the embodiment shown in the figures, the brushless motor 1 includes
Stator module, the rotor assembly being set in the stator module and the wind being fixed in the central spindle 202 of the rotor assembly
Leaf 30；Wherein, 202 a straight grain knurled portions 2021 are formed in the central spindle, the through-hole 305 and the straight grain of the fan blade 30 roll
Flower portion 2021 is interference fitted so that the fan blade 30 is fixed in the central spindle 202, it is preferable that in the present embodiment, the fan blade
The axial protrusion 306 that multiple axial notches 2022 with straight knurling portion 2021 cooperate is formed at 30 305 inner wall of through-hole.
Understandably, the straight knurling portion 2021 is by carrying out annular knurl processing formation to the central spindle 202 comprising around described
Multiple axial notches 2022 that central spindle 202 is formed, it is preferable that in the present embodiment, the fan blade 30 is made of plastic cement, and described
It can be also marked with anaerobic adhesive between straight knurling 2021 and protrusion 306, to increase the adhesive force of fan blade 30.Based on above-mentioned design, originally
Straight knurling portion 2021 is formed in the central spindle 202 of invention brushless motor 1, and in the brushless motor 1 through-hole 305 of fan blade 30 with
The straight knurling portion 2021 is interference fitted so that the fan blade 30 is fixed in the central spindle 202, passes through fan blade 30 and straight grain
The interference fit of knurled portions 2021 can prevent the radial rotary of fan blade 30, and fan blade 30 is effectively avoided to generate axial displacement, thus anti-
Only fan blade 30 falls off from central spindle 202, to improve 1 job stability of motor.Further, brushless motor of the present invention is in fan blade 30
The position that straight knurling portion 2021 is coupled is provided with multiple axial notches 2022 with the straight knurling portion 2021 to match
The axial protrusion 306 of conjunction, may make the fan blade 30 and the installation of central spindle 202 more secured.
Understandably, in some other embodiments, if 305 inner wall smooth of through-hole of the fan blade 30, is not formed more
A axial protrusion 306, and if it is made of plastic cement, because fan blade 30 and straight knurling portion 2021 are interference fitted, then when straight grain rolls
When flower portion 2021 is completely forced into through-hole 305, fan blade 30 is influenced to be deformed by interference fit, and a part of plastic cement of fan blade 30 will be into
In the axial notch 2022 for entering straight knurling portion 2021, the radial rotary of fan blade 30 and axially displaced can also be effectively prevented.
In certain embodiments, the rotor assembly includes a cylindrical housings 201, a central spindle 202, multiple magnet
203, a drive end bearing bracket 205 and a rear end cap 206, the drive end bearing bracket 205 and rear end cap 206 are covered on the cylindrical housings respectively
201 front end faces and rear end face, a plurality of cavities 204 are offered in the cylindrical housings 201, and each magnet 203 is set to a cavity 204
Interior, the central spindle 202 runs through the cylindrical housings 201, and the straight knurling portion 2021 is set to end thereafter, the present embodiment
In, the magnet 203 selects thin slice permanent magnet, and quantity is set as four, correspondingly, the quantity of cavity 204 is also configured as four
A, in some other embodiments, the quantity of the magnet 203 and cavity 204 can be according to the size of the cylindrical housings 201
It is configured.
Referring to Fig. 4 and Fig. 5, in certain embodiments, the outside diameter d 2 in the straight knurling portion 2021 and the diameter of axle of central spindle 202
D1 is identical, to reduce by 202 attrition process cost of central spindle.When because of knurled portions processing, if the outside diameter d 2 in straight knurling portion 2021 is greater than
The diameter of axle d1 of central spindle 202 then needs annular knurl again after refining to entire central spindle 202 half, and needs additionally to increase knurled portions after annular knurl
One of precision grinding process, 202 processing cost of central spindle is higher, and if the diameter of axle d1 of the outside diameter d 2 in straight knurling portion 2021 and central spindle 202
It whole half is refined again after identical 202 annular knurl of then central spindle, then can reduce by 202 attrition process cost of central spindle.
In certain embodiments, the stator module includes shell, stator core 101, upper bearing (metal) 102 and lower bearing 103,
The stator core 101 is set in the shell, and referring to Fig. 8, multiple uniform points are formed on 101 inner peripheral surface of stator core
The stator salient poles 1011 of cloth, coil (not shown) is wound in each stator salient poles 1011, and the rotor assembly is logical
Cross upper bearing (metal) 102 and lower bearing 103 and cage connection, it will be appreciated that ground, be equipped in the shell accommodate the upper bearing (metal) 102 and under
The chamber resettling of bearing 103, the central spindle 202 sequentially pass through shell, upper bearing (metal) 102, fan blade 30, drive end bearing bracket 205, circular cylindrical shell
Body 201, rear end cap 206 and lower bearing 103.Based on above-mentioned design, upper bearing (metal) 102 and lower bearing 103 can reduce central spindle 202 and outer
Coefficient of friction between shell, to reduce the frictional resistance being subject in 202 rotation process of central spindle.And the brushless motor 1 in the present invention is logical
Electricity, electric current generate rotating excitation field when flowing through the coil in stator module, so that the magnet 203 in rotor assembly can drive rotor set
Part is the rotation of center axis with central spindle 202, and central spindle 202 is driven to rotate, thus drive the rotation of fan blade 30 to form radiating airflow, because
When electric current flowing through coil, coil can generate heat, then the radiating airflow that the rotation of fan blade 30 is formed can take away most of coil and generate
Heat, the temperature inside brushless motor 1 can be reduced, so that 1 job stability of motor also can be improved.
Referring to Fig. 6 to Fig. 7, in the embodiment shown in the figures, the fan blade 30 includes a discshaped body 301 and multiple
The flabellum 302 to extend out from the upper surface of the discshaped body 301, the center position of 301 upper surface of discshaped body
Equipped with a rotary table 303, multiple flabellums 302 radially distribute around the rotary table 303, and under the discshaped body 301
Surface, which corresponds to, is equipped with a column 304 at the rotary table 303, the through-hole 305 is set on the rotary table 303 and column 304.
Preferably, in the present embodiment, the through-hole 305 successively includes the first circular hole 3051, the second circular hole 3052 and third circular hole
3053, the diameter of first circular hole 3051 is identical as the diameter of third circular hole 3053, and has a diameter larger than the second circular hole 3052
Diameter, the axial protrusion 306 be set to 3052 inner wall of the second circular hole on, with the axis with the straight knurling portion 2021
It is coupled to groove 2022.
In conclusion being formed with straight knurling portion in the central spindle of brushless motor of the present invention, and fan blade in the brushless motor
Through-hole and the straight knurling portion are interference fitted so that the fan blade is fixed in the central spindle, passes through fan blade and straight knurling portion
Interference fit, the radial rotary of fan blade can be prevented, effectively avoid fan blade generate axial displacement, to prevent fan blade from central spindle
It falls off, to improve motor job stability.
The above description is only a preferred embodiment of the present invention, rather than does limitation in any form to the application.This field
Technical staff can impose various equivalent changes and improvement, all institutes within the scope of the claims on the basis of the above embodiments
The equivalent variations or modification done, should all fall within the scope of the present application.
Claims (10)
1. a kind of brushless motor, includes stator module, the rotor assembly being set in the stator module and be fixed on institute
State the fan blade in the central spindle of rotor assembly, it is characterised in that：A straight grain knurled portions are formed in the central spindle, the fan blade leads to
Hole and the straight knurling portion are interference fitted so that the fan blade is fixed in the central spindle.
2. brushless motor as described in claim 1, it is characterised in that：Multiple axial directions are formed at the through-hole wall of the fan blade
Protrusion.
3. brushless motor as described in claim 1, it is characterised in that：The outer diameter in the straight knurling portion and the diameter of axle phase of central spindle
Together.
4. brushless motor as described in claim 1, it is characterised in that：The rotor assembly includes a cylindrical housings, one
Central spindle and multiple magnet offer a plurality of cavities in the circular cylindrical shell body, and each magnet is set in a cavity, and the central spindle is passed through
The cylindrical housings are worn, and the straight knurling portion is set to end thereafter.
5. brushless motor as claimed in claim 4, it is characterised in that：The rotor assembly further includes having drive end bearing bracket and rear end
Lid, the drive end bearing bracket and rear end cap are covered on the cylindrical housings front end face and rear end face respectively.
6. brushless motor as claimed in claim 4, it is characterised in that：The magnet is thin slice permanent magnet.
7. brushless motor as described in claim 1, it is characterised in that：The stator module includes shell, stator core, upper axis
It holds and lower bearing, the stator core is set in the shell, be formed with multiple be uniformly distributed on the stator core inner peripheral surface
Stator salient poles, coil is wound in each stator salient poles, the rotor assembly passes through upper bearing (metal) and lower bearing and shell
Connection, the central spindle sequentially pass through shell, upper bearing (metal), fan blade, cylindrical housings and lower bearing.
8. brushless motor as described in claim 1, it is characterised in that：The fan blade includes a discshaped body and multiple from institute
The flabellum that the upper surface of discshaped body extends out is stated, the center position of discshaped body upper surface is equipped with a rotary table, more
A flabellum radially distributes around the rotary table, and the discshaped body lower surface corresponds at the rotary table equipped with one
Column, the through-hole are set on the rotary table and column.
9. brushless motor as claimed in claim 8, it is characterised in that：The through-hole successively includes the first circular hole, the second circle
The diameter of hole and third circular hole, first circular hole is identical as the diameter of third circular hole, and has a diameter larger than the straight of the second circular hole
Diameter, the central spindle wear the through-hole and the straight knurling portion are set in second circular hole.
10. brushless motor as described in claim 1, it is characterised in that：The fan blade is made of plastic cement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811049237.3A CN108923583A (en) | 2018-09-10 | 2018-09-10 | A kind of brushless motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811049237.3A CN108923583A (en) | 2018-09-10 | 2018-09-10 | A kind of brushless motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108923583A true CN108923583A (en) | 2018-11-30 |
Family
ID=64408214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811049237.3A Pending CN108923583A (en) | 2018-09-10 | 2018-09-10 | A kind of brushless motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108923583A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020232803A1 (en) * | 2019-05-23 | 2020-11-26 | 江苏铁锚工具有限公司 | Brushless motor |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102465825A (en) * | 2010-10-31 | 2012-05-23 | 扬州神州风力发电机有限公司 | Blade screw-free fixing device for wind power generator |
| CN203014596U (en) * | 2012-12-03 | 2013-06-19 | 东明机电（深圳）有限公司 | Series-excitation motor provided with external fan blades |
| CN203537171U (en) * | 2013-09-18 | 2014-04-09 | 苏州永捷电机有限公司 | Connection mechanism |
| CN203702653U (en) * | 2014-01-02 | 2014-07-09 | 苏州城邦减速电机制造有限公司 | Fan blade used for motor |
| CN205051500U (en) * | 2015-09-18 | 2016-02-24 | 宁波艾德轴业有限公司 | Rotor shaft |
| CN208738978U (en) * | 2018-09-10 | 2019-04-12 | 东昌电机(深圳)有限公司 | A kind of brushless motor |
-
2018
- 2018-09-10 CN CN201811049237.3A patent/CN108923583A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102465825A (en) * | 2010-10-31 | 2012-05-23 | 扬州神州风力发电机有限公司 | Blade screw-free fixing device for wind power generator |
| CN203014596U (en) * | 2012-12-03 | 2013-06-19 | 东明机电（深圳）有限公司 | Series-excitation motor provided with external fan blades |
| CN203537171U (en) * | 2013-09-18 | 2014-04-09 | 苏州永捷电机有限公司 | Connection mechanism |
| CN203702653U (en) * | 2014-01-02 | 2014-07-09 | 苏州城邦减速电机制造有限公司 | Fan blade used for motor |
| CN205051500U (en) * | 2015-09-18 | 2016-02-24 | 宁波艾德轴业有限公司 | Rotor shaft |
| CN208738978U (en) * | 2018-09-10 | 2019-04-12 | 东昌电机(深圳)有限公司 | A kind of brushless motor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020232803A1 (en) * | 2019-05-23 | 2020-11-26 | 江苏铁锚工具有限公司 | Brushless motor |
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Effective date of registration: 20200213 Address after: 518000 Guangtian green decoration industrial base Park, building 2, No. 86 Xiangyang Road, Yanchuan community, Yanluo street, Bao'an District, Shenzhen City, Guangdong Province Applicant after: Dongxingchang Technology (Shenzhen) Co., Ltd Address before: 518000, Shenzhen, Guangdong, Baoan District manhole street, Whampoa community, hung Tian Road, hung Tian, Jin Yuan Industrial Zone, building D, A24 third Applicant before: DONGCHANG MOTOR (SHENZHEN) Co.,Ltd. |