CN106411026A - Miniature digital direct current motor - Google Patents
Miniature digital direct current motor Download PDFInfo
- Publication number
- CN106411026A CN106411026A CN201610925660.XA CN201610925660A CN106411026A CN 106411026 A CN106411026 A CN 106411026A CN 201610925660 A CN201610925660 A CN 201610925660A CN 106411026 A CN106411026 A CN 106411026A
- Authority
- CN
- China
- Prior art keywords
- circle
- ball grooves
- end cover
- twice
- direct current
- 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.)
- Granted
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
-
- 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
Abstract
The invention discloses a miniature digital direct current motor, which comprises a motor shell, a stator assembly and a rotor assembly, wherein the stator assembly and the rotor assembly are arranged in the motor shell. The miniature digital direct current motor is characterized in that the rotor assembly comprises a rotating shaft provided with an impeller and a rotor; the internal part of the motor shell is provided with a fan end cover which is integrally connected with the motor shell, and the middle part of the fan end cover is provided with a shaft hole portion used for installing the rotating shaft; the impeller is located at the outer side of the fan end cover, and the fan end cover is integrally provided with air guide pieces around the impeller; a gap is reserved between the edge of a front end cover and the side wall of the motor shell so as to form an air duct, the air guide pieces are involute arc-shaped, one ends of the air guide pieces are integrally connected with the outer wall of the fan end cover, the other ends of the air guide pieces stride over the air duct and are integrally connected with the inner side wall of the motor shell, the spaced air guide pieces form an air guide duct therebetween, and the air guide ducts are connected with the air duct. According to the invention, a structure of air guide pieces which are integrally manufactured together with the fan end cover is adopted, the air outlet volume of the air duct is optimized, the work efficiency of the impeller is improved, and airflow noises can be effectively reduced.
Description
Technical field
The present invention relates to a kind of motor, specifically a kind of Miniature digital direct current generator.
Background technology
The rotor assembly of direct current generator may include impeller, and this impeller is with respect to the cover rotation being fixed in turbine.Direct current
Motor is mainly used in vacuum cleaner, hand dryer etc. as evacuation driving source, the motor part rotating speed of turbine can be up to 50,000 to
100000 rpm.Under the high rotating speed of here, the required precision to rotor assembly is very high, and the bearing of rotor assembly is difficult in rotation process
Exempt to have and jump, rotor assembly is shaken due to unbalanced power, the vibrations that impeller is with respect to cover can be led to, produce noise.
Number of patent application is that 201280041747.0 patent of invention discloses a kind of rotor assembly, and this rotor assembly includes
Axle, bearing assembly, impeller and cover, this impeller and bearing assembly are installed to axle, and this cover is installed to bearing assembly to cover
Lid impeller.Cover is being installed in bearing assembly, impeller rotates freely through with respect to cover.Because cover forms of rotor assembly
Point, the displacement of the impeller being led to due to the vibrations of rotor assembly is along with the displacement of cover.Gap between impeller and cover is not being examined
It is kept in the case of the vibrations considering rotor assembly.As a result, noise less during operation is produced by rotor assembly.Cover is pacified
It is attached to bearing assembly to also allow for setting up the good gap limiting between impeller and cover.Especially, gap can not be subject to turbine
The installation of the rotor assembly in machine or alignment impact.
As shown in figure 1, bearing 91 assembly disclosed in this patent may include a pair by sleeve 9 around spaced apart bearing
91.This covers in and is mounted to sleeve 9, and sleeve 9 provides relatively large surface, and covering in is to be mounted on a surface.Relatively
Good fixation can be formed between cover and bearing 91 assembly.Additionally, by sleeve 9 around the arranging of spaced apart bearing 91
Apply the rigidity that increased rotor assembly, itself so that lead to higher first to bend frequency.Therefore, this rotor assembly can make more
Operate at high subcritical speed.
, due to inevitably there is dress between bearing inner race, bearing outer ring and ball in prior art disclosed in this patent
Join gap, under tens of thousands of turns of high-speed rotation, very big impact is played to the stability of rotor in this gap.In prior art,
In order to eliminate the impact of bearing inner race and bearing outer ring, keep rotor at a high speed under stability and quiet, two bearings 91 except
Surrounded by sleeve 9 outer, between two bearings 91, be also assembled with spring 92, made between the outer ring of two bearings 91 by spring 92
There is repulsion, to offset the power that jumps of a part.Although the prior art greatly improves rotor performance at high speeds,
Assembling structure is complicated, and eliminates, by spring force, the impact that jumps, and has certain scope of application, and load exceedes during spring force still
The stability of rotating shaft can be affected.
Content of the invention
The present invention is directed to direct current generator of the prior art low technical problem of impeller air draught efficiency under high-speed rotation, and
A kind of Miniature digital direct current generator is provided, improves the air draught flow of impeller by improving wind-guiding chip architecture.
The present invention solves the technical scheme that adopted of above-mentioned technical problem：A kind of Miniature digital direct current generator, including electricity
Casing body and in electric machine casing stator assembly and rotor assembly.Rotor assembly includes being provided with turning of impeller and rotor
Axle；The inside of electric machine casing is formed with the end cover of fan being connected with electric machine casing one, and the middle part of end cover of fan has installation rotating shaft
Axle hole；Impeller is located at the outside of end cover of fan, and end cover of fan is integrally formed with the guide vane around impeller；The side of drive end bearing bracket
The side wall of edge and electric machine casing has and is spaced and constitutes air channel, and guide vane is in involute arc, the outer wall of one end and end cover of fan
One is connected, and the other end is connected across air channel with the medial wall one of electric machine casing, is formed and wind between guide vane separately
The wind guide channel that road is connected.
For optimizing technique scheme, present invention additionally comprises improved technical scheme below.
Above-mentioned impeller has base plate and Shang Gai, and the center of upper lid is formed with the air inlet raising up, base plate and upper lid it
Between be fixed with rotating vane, rotating vane be distributed in air inlet periphery.
Above-mentioned end cover of fan is formed with 15 to 19 guide vanes that one is connected；Rotating vane and the minimum interval of guide vane
Distance is less than or equal to 0.4mm.
The end of above-mentioned guide vane is extended into air channel and is connected with the sidewall of motor housing in air channel；Each guide vane
Equidistantly be arranged on the outer wall of end cover of fan, wind guide channel near rotating vane entrance and near air channel exit width phase
With.
Rotate secondary structure to simplify, it is to avoid the rotating shaft that prior art middle (center) bearing causes jumps and rocks, improve rotor
Stability under high-speed rotation for the assembly and quietness, the outer surface interval of above-mentioned rotating shaft is formed with the first ball of twice annular
Groove, the outside of rotating shaft is arranged with the installation set surrounding twice first ball grooves, and it is corresponding that the inwall interval of installation set is formed with twice
Second ball grooves, are provided with a circle ball between the first ball grooves and the second ball grooves.
It is provided with retainer, retainer has the interval body separating each ball between above-mentioned installation set and rotating shaft.
Second axial cross section of the first axial cross section of above-mentioned first ball grooves and the second ball grooves is respectively arc surface；The
The radius of the radius of one axial cross section and the second axial cross section is respectively greater than the radius of ball.
The center of circle in arbitrarily the side above-mentioned first circular arc center of circle, the second circular arc center of circle and ball interlaces out.
The first circular arc distance of center circle between above-mentioned twice first ball grooves is more than the second circle between twice second ball grooves
Arc distance of center circle, and the second circular arc center of circle of twice second ball grooves is between the first circular arc center of circle of twice first ball grooves.
The first circular arc distance of center circle between above-mentioned twice first ball grooves is less than the second circle between twice second ball grooves
Arc distance of center circle, and the first circular arc center of circle of twice first ball grooves is between the second circular arc center of circle of twice second ball grooves.
Compared with prior art, a kind of Miniature digital direct current generator of the present invention, is made into integration using with end cover of fan
Wind-guiding chip architecture, optimizes the air output in air channel, improves the work efficiency of impeller, and can effectively reduce pneumatic noise.
Brief description
Fig. 1 is the structural representation of rotating shaft in prior art.
Fig. 2 is the structural representation of rotating shaft in the present invention.
Fig. 3 is the B-B direction profile of Fig. 2.
Fig. 4 is the A portion close-up schematic view in Fig. 3.
Fig. 5 is the assembling decomposing schematic representation of the present invention.
Fig. 6 is the cross-sectional view of the present invention.
Fig. 7 is the C-C of Fig. 6 to profile.
Fig. 8 is the structural representation of guide vane in Fig. 5.
Specific embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are described in further detail.
Fig. 1 to Fig. 8 show the structural representation of the present invention.
Reference therein is：Rotating shaft 1, the first ball grooves 1a, the first axial cross section 1b, the first circular arc center of circle 1c, rolling
Pearl 11, installation set 2, the second ball grooves 2a, the second axial cross section 2b, the second circular arc center of circle 2c, retainer 3, impeller 4, base plate 41,
Upper lid 42, air inlet 42a, rotating vane 43, electric machine casing 5, end cover of fan 51, axle hole 51a, guide vane 52, wind guide channel 53,
Air channel 54, sleeve 9, bearing 91, spring 92.
A kind of Miniature digital direct current generator of the present invention, the stator pack including electric machine casing 5 and in electric machine casing 5
Part and rotor assembly.Rotor assembly includes being provided with the rotating shaft 1 of impeller 4 and rotor.
The inside of electric machine casing 5 is formed with the end cover of fan 51 being connected with electric machine casing 5 one, the middle part tool of end cover of fan 51
There is the axle hole 51a installing rotating shaft 1.Rotating shaft 1 passes through end cover of fan 51, and is rotatably installed in the 51a of axle hole.
Impeller 4 is located at the outside of end cover of fan 51, and end cover of fan 51 is integrally formed with the guide vane 52 around impeller 4.Before
The side wall of the edge of end cap and electric machine casing 5 has and is spaced and constitutes air channel 54, and guide vane 52 is in involute arc, one end and wind
The outer wall one of generator terminal lid 51 is connected, and the other end is connected across the medial wall one of air channel 54 and electric machine casing 5, leading separately
Form the wind guide channel 53 being connected with air channel 54 between wind piece 52.
Impeller 4 has base plate 41 and upper lid 42, and the center of upper lid 42 is formed with the air inlet 42a raising up, base plate 41 He
It is fixed with rotating vane 43, rotating vane 43 is being distributed in air inlet 42a periphery between upper lid 42.Rotating shaft 1 can be with impeller 4
With tens of thousands of rpms of high-speed rotation, impeller 4 passes through rotating vane 43 and sucks air-flow from air inlet 42a, and by air-flow to
The wind guide channel 53 of impeller 4 periphery is discharged.
End cover of fan 51 outer wall is formed with 15 to 19 guide vanes 52 that one is connected.The quantity of guide vane 52 is preferably 17
Individual, rotating vane 43 is less than or equal to 0.4mm with the minimum separation distances of guide vane 52.During guide vane 52 with the axle center of rotating shaft 1 is
The heart is symmetrical, and the radian of each guide vane 52 is in involute, can quickly guide air-flow to discharge from air channel 54, reduces air-flow
Sound, improves air-flow and passes through efficiency.
During impeller 4 high-speed rotation, air stream enters impeller 4 from air inlet 42a, enters wind guide channel through rotating vane 43
53.Rotating vane 43 is less with the spacing distance of guide vane 52, and pneumatic noise is less, can improve air mass flow simultaneously.
The end of guide vane 52 is extended into air channel 54 and is connected with the electric machine casing 5 side wall in air channel 54.Each is led
Wind piece 52 is equidistantly arranged on the outer wall of end cover of fan 51, and wind guide channel 53 is near the entrance of rotating vane 43 and near air channel 54
Exit width identical.
It is formed with the first ball grooves 1a of twice annular at the outer surface interval of rotating shaft 1, the outside of rotating shaft 1 is arranged with encirclement two
The installation set 2 of road the first ball grooves 1a, the inwall interval of installation set 2 is formed with the corresponding second ball grooves 2a of twice, in the first rolling
It is provided with a circle ball 11 between pearl groove 1a and the second ball grooves 2a.In the present invention, rotating shaft 1 and installation set 2 directly constitute rotation pair,
Between do not need to install bearing additional.Two circle balls 11 are separately positioned between twice the first ball grooves 1a and the second ball grooves 2a,
Because rotating shaft 1 and installation set 2 are all rigid bodies, constrain two circle balls 11 in the stability of high-speed rotation process, greatly improve
The high speed running performance of rotating shaft 1, and reduce the impact such as noise.
It is provided with retainer 3 between installation set 2 and rotating shaft 1.The body of retainer 3 is annular, has and separate on annular solid
The interval body of each ball 11.Retainer 3 loads from the two ends of installation set 2, is fixed with envelope again in the end of installation set 2.
The second axial cross section 2b of the first axial cross section 1b of the first ball grooves 1a and the second ball grooves 2a is respectively circular arc
Face.The radius of the radius of the first axial cross section 1b and the second axial cross section 2b is respectively greater than the radius of ball 11.
The center of circle of arbitrarily side the first circular arc center of circle 1c, the second circular arc center of circle 2c and ball 11 interlaces out.
In a preferred embodiment, the first circular arc distance of center circle between twice the first ball grooves 1a rolls more than twice second
The second circular arc distance of center circle between pearl groove 2a, and the second circular arc center of circle 2c of twice the second ball grooves 2a is located at twice first ball
Between the first circular arc center of circle 1c of groove 1a.Therefore, any side the first circular arc center of circle 1c, the second circular arc center of circle 2c and ball 11
The center of circle is staggered.
In the present invention, because rotating shaft 1 and installation set 2 are all an entirety, two circle balls 11 direct and rotating shaft 1 and installation set
2 match.As shown in figure 4, the second circular arc circle of the first circular arc center of circle 1c and the second ball grooves 2a of twice the first ball grooves 1a
Heart 2c is simultaneously misaligned.So when the ball 11 on right side loads between the first ball grooves 1a and the second ball grooves 2a, being and the first rolling
Match in the left side of pearl groove 1a, match with the right-hand part of the second ball grooves 2a simultaneously, and the ball 11 in left side is exactly simultaneously
Symmetrical.Because the center of circle at two circle balls 11 is all misaligned, can nature produce to middle restraining forceies under high-speed rotation, with
Payment load or external environment condition cause
Although radius ratio ball 11 radius of the first ball grooves 1a and the second ball grooves 2a is big, there is fit-up gap.But in ball
The impact of fit-up gap still can be eliminated after 11 loadings, be automatically fitted close with the first ball grooves 1a and the second ball grooves 2a.This
Sample, when rotating shaft 1 is with respect to installation set 2 high-speed rotation, two circle balls 11 can effectively prevent rotating shaft 1 in the axial direction jump and
Rocking radially.
In another kind of preferred implementation, the first circular arc distance of center circle between twice the first ball grooves 1a can be less than two
The second circular arc distance of center circle between road the second ball grooves 2a, and the first circular arc center of circle 1c of twice the first ball grooves 1a is located at twice
Between the second circular arc center of circle 2c of the second ball grooves 2a.In this embodiment, the first circular arc center of circle 1c of any side, second
Circular arc center of circle 2c is equally staggered with the center of circle of ball 11.
Highly preferred embodiment of the present invention illustrates, and the various change made by those of ordinary skill in the art or remodeling are not
Can depart from the scope of the present invention.
Claims (10)
1. a kind of Miniature digital direct current generator, the stator module including electric machine casing (5) and in electric machine casing (5) and turn
Sub-component, is characterized in that：Described rotor assembly includes being provided with the rotating shaft (1) of impeller (4) and rotor；Described electric machine casing
(5) inside is formed with the end cover of fan (51) being connected with electric machine casing (5) one, and the middle part of described end cover of fan (51) has peace
Fill the axle hole (51a) of described rotating shaft (1)；Described impeller (4) is located at the outside of end cover of fan (51), described end cover of fan
(51) integrally it is formed with the guide vane (52) around impeller (4) on；The edge of described drive end bearing bracket is had with the side wall of electric machine casing (5)
It is spaced and constitutes air channel (54), described guide vane (52) is in involute arc, the outer wall one of one end and end cover of fan (51)
Be connected, the other end is integrally connected across the medial wall of described air channel (54) and electric machine casing (5), guide vane (52) separately it
Between form the wind guide channel (53) that is connected with air channel (54).
2. a kind of Miniature digital direct current generator according to claim 1, is characterized in that：Described impeller (4) has base plate
(41) and upper lid (42), the center of described upper lid (42) is formed with the air inlet (42a) raising up, described base plate (41) and upper
It is fixed with rotating vane (43), described rotating vane (43) is being distributed in air inlet (42a) periphery between lid (42).
3. a kind of Miniature digital direct current generator according to claim 2, is characterized in that：Described end cover of fan (51) is formed with
15 to 19 guide vanes (52) that one is connected；Rotating vane (43) is less than or equal to the minimum separation distances of guide vane (52)
0.4mm.
4. a kind of Miniature digital direct current generator according to claim 3, is characterized in that：The end of described guide vane (52) to
Extend in described air channel (54) and be connected with electric machine casing (5) the side wall in air channel (54)；Each described guide vane (52)
Equidistantly it is arranged on the outer wall of end cover of fan (51), described wind guide channel (53) is near the entrance of rotating vane (43) and near wind
The exit width in road (54) is identical.
5. a kind of Miniature digital direct current generator according to claim 4, is characterized in that：Between the outer surface of described rotating shaft (1)
Every the first ball grooves (1a) being formed with twice annular, the outside of described rotating shaft (1) is arranged with described twice first ball grooves of encirclement
(1a) installation set (2), the inwall interval of described installation set (2) is formed with corresponding second ball grooves of twice (2a), described
It is provided with a circle ball (11) between first ball grooves (1a) and the second ball grooves (2a).
6. a kind of Miniature digital direct current generator according to claim 5, is characterized in that：Described installation set (2) and rotating shaft
(1) it is provided with retainer (3) between, described retainer (3) has the interval body separating each ball (11).
7. a kind of Miniature digital direct current generator according to claim 6, is characterized in that：The of described first ball grooves (1a)
Second axial cross section (2b) of one axial cross section (1b) and the second ball grooves (2a) is respectively arc surface；Described first axial cross section
(1b) radius and the radius of the radius of the second axial cross section (2b) respectively greater than ball (11).
8. a kind of Miniature digital direct current generator according to claim 7, is characterized in that：The first circular arc arbitrarily described in side
The center of circle (1c), the second circular arc center of circle (2c) and the center of circle of ball (11) interlace out.
9. a kind of Miniature digital direct current generator according to claim 8, is characterized in that：Described twice first ball grooves (1a)
Between the first circular arc distance of center circle be more than the second circular arc distance of center circle between twice second ball grooves (2a), and twice second ball
The second circular arc center of circle (2c) of groove (2a) is located between the first circular arc center of circle (1c) of twice first ball grooves (1a).
10. a kind of Miniature digital direct current generator according to claim 8, is characterized in that：Described twice first ball grooves
(1a) the first circular arc distance of center circle between is less than the second circular arc distance of center circle between twice second ball grooves (2a), and twice first
The first circular arc center of circle (1c) of ball grooves (1a) is located between the second circular arc center of circle (2c) of twice second ball grooves (2a).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610925660.XA CN106411026B (en) | 2016-10-24 | 2016-10-24 | A kind of Miniature digital direct current generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610925660.XA CN106411026B (en) | 2016-10-24 | 2016-10-24 | A kind of Miniature digital direct current generator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106411026A true CN106411026A (en) | 2017-02-15 |
| CN106411026B CN106411026B (en) | 2019-06-14 |
Family
ID=58013171
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610925660.XA Active CN106411026B (en) | 2016-10-24 | 2016-10-24 | A kind of Miniature digital direct current generator |
Country Status (1)
| Country | Link |
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| CN (1) | CN106411026B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108306453A (en) * | 2018-03-02 | 2018-07-20 | 追觅科技（天津）有限公司 | A kind of motor and hair-dryer |
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| CN203691122U (en) * | 2013-12-26 | 2014-07-02 | 东明机电（深圳）有限公司 | Dust collector motor provided with wind-guiding disc |
| CN203933219U (en) * | 2014-06-12 | 2014-11-05 | 莱克电气股份有限公司 | A kind of end cap of motor of dust collector |
| CN105587773A (en) * | 2016-02-23 | 2016-05-18 | 安徽省宁国顺昌机械有限公司 | High-hardness bearing |
| CN206211737U (en) * | 2016-10-24 | 2017-05-31 | 宁波纽新克电机股份有限公司 | A kind of Miniature digital direct current generator |
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- 2016-10-24 CN CN201610925660.XA patent/CN106411026B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201771833U (en) * | 2010-08-23 | 2011-03-23 | 湖北飞剑泵业有限公司 | Water-proof coupling bearing for water pump |
| CN203691122U (en) * | 2013-12-26 | 2014-07-02 | 东明机电（深圳）有限公司 | Dust collector motor provided with wind-guiding disc |
| CN203933219U (en) * | 2014-06-12 | 2014-11-05 | 莱克电气股份有限公司 | A kind of end cap of motor of dust collector |
| CN105587773A (en) * | 2016-02-23 | 2016-05-18 | 安徽省宁国顺昌机械有限公司 | High-hardness bearing |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108306453A (en) * | 2018-03-02 | 2018-07-20 | 追觅科技（天津）有限公司 | A kind of motor and hair-dryer |
| CN108306453B (en) * | 2018-03-02 | 2023-09-01 | 追觅创新科技(苏州)有限公司 | Motor and blower |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106411026B (en) | 2019-06-14 |
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Address after: 315100 Zhejiang city of Ningbo province Yinzhou District Jingu Road No. 219 Patentee after: Ningbo Newark Electric Co., Ltd Address before: 315100 Zhejiang city of Ningbo province Yinzhou District Jingu Road No. 219 Patentee before: Ningbo new G motor Limited by Share Ltd |