CN206211734U - A kind of DC micromotor - Google Patents
A kind of DC micromotor Download PDFInfo
- Publication number
- CN206211734U CN206211734U CN201621150660.9U CN201621150660U CN206211734U CN 206211734 U CN206211734 U CN 206211734U CN 201621150660 U CN201621150660 U CN 201621150660U CN 206211734 U CN206211734 U CN 206211734U
- Authority
- CN
- China
- Prior art keywords
- ball grooves
- twice
- circle
- circular arc
- center
- 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.)
- Withdrawn - After Issue
Links
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model discloses a kind of DC micromotor, including electric machine casing and in electric machine casing stator assembly and rotor assembly.Rotor assembly includes being provided with the rotating shaft of impeller and rotor, the outer surface interval of the rotating shaft is formed with the first ball grooves of twice annular, the outside of the rotating shaft is arranged with an installation set for the encirclement ball grooves of twice first, the inwall interval of the installation set is formed with corresponding second ball grooves of twice, and multiple balls are provided between described the first ball grooves and the second ball grooves.A kind of DC micromotor of the present utility model, bearing need not be used as rotating connector, avoid between bearing outer ring, bearing inner race and ball because fit-up gap causes jumping and rocking for rotating shaft, the spring between two bearings is saved simultaneously, assembling structure is simplified, makes rotating shaft have the advantages that to stablize Jing Yin at high speeds.
Description
Technical field
The utility model is related to a kind of motor, specifically a kind of DC micromotor.
Background technology
The rotor assembly of direct current generator may include impeller, and the impeller rotates relative to the cover being fixed in turbine.Direct current
Motor is mainly used in dust catcher, hand dryer etc. as vacuumizing driving source, the motor part rotating speed of turbine can be up to 50,000 to
100000 rpm.Herein under rotating speed high, 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, impeller can be caused relative to the vibrations of cover, produce noise.
Number of patent application is that 201280041747.0 patent of invention discloses a kind of rotor assembly, and the rotor assembly includes
Axle, bearing assembly, impeller and cover, the impeller and bearing assembly are installed to axle, and the cover is installed to bearing assembly to cover
Lid impeller.It is installed in bearing assembly by cover, impeller is rotated freely through relative to cover.Because cover forms of rotor assembly
Point, due to impeller caused by the vibrations of rotor assembly displacement along with cover displacement.Do not examining in gap between impeller and cover
It is kept in the case of the vibrations for considering rotor assembly.As a result, noise less during operation is produced by rotor assembly.Cover is pacified
Bearing assembly is attached to also allow for setting up the good gap for limiting between impeller and cover.Especially, gap can not receive turbine
The installation or alignment influence of the rotor assembly in machine.
As shown in figure 1, the component of bearing 91 disclosed in the patent may include a pair by sleeve 9 around bearing spaced apart
91.This covers in and is mounted to sleeve 9, and sleeve 9 provides relatively large surface, and it is to be mounted on a surface to cover in.Relatively
Good fixation can be formed between cover and the component of bearing 91.Additionally, by sleeve 9 around bearing 91 spaced apart arrange
Apply the rigidity that increased rotor assembly, itself so that cause higher first to bend frequency.Therefore, the rotor assembly can make more
Operated at subcritical speed high.
Prior art disclosed in the patent, due to inevitably there is dress between bearing inner race, bearing outer ring and ball
With gap, under tens of thousands of turns of high speed rotation, very big influence is played in the gap to the stability of rotor.In the prior art,
In order to eliminate the influence of bearing inner race and bearing outer ring, stability under keeping rotor at a high speed and Jing Yin, two bearings 91 except
Surround outer by sleeve 9, spring 92 is also assembled between two bearings 91, made between two outer rings of bearing 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, but
Assembling structure is complicated, and eliminates the influence that jumps by spring force, has certain scope of application, when load is more than spring force still
The stability of rotating shaft can be influenceed.
The content of the invention
Technical problem to be solved in the utility model is directed to above-mentioned state of the art, and provides a kind of minisize dc
Motor, enormously simplify and rotate secondary structure, it is to avoid what bearing caused jumping and rocking, and greatly improves rotor assembly at a high speed
Stability and quietness under rotating.
The utility model solve the technical scheme that is used of above-mentioned technical problem for：A kind of DC micromotor, including electricity
Casing body and in electric machine casing stator assembly and rotor assembly.Rotor assembly includes being provided with turning for impeller and rotor
Axle, the outer surface interval of the rotating shaft is formed with the first ball grooves of twice annular, and the outside of the rotating shaft is arranged with an encirclement
The installation set of the ball grooves of twice first, the inwall interval of the installation set is formed with corresponding second ball grooves of twice, described
Multiple balls are provided between first ball grooves and the second ball grooves.
It is optimization above-mentioned technical proposal, the utility model also includes following improved technical scheme.
Retainer is provided between above-mentioned installation set and rotating shaft, described retainer has the interval for separating each ball
Body.
First axial cross section of above-mentioned first ball grooves and the second axial cross section of the second ball grooves are respectively arc surface；Institute
State the radius of the radius of the first axial cross section and the radius respectively greater than ball of the second axial cross section.
The arbitrarily first circular arc center of circle of above-mentioned first axial cross section in side, the second circular arc center of circle of the second axial cross section and rolling
The center of circle of pearl interlaces out.
The first circular arc distance of center circle between the ball grooves of above-mentioned twice first is more than the second circle between the ball grooves of twice second
Arc distance of center circle, and the ball grooves of twice second the second circular arc center of circle be located at the ball grooves of twice first the first circular arc center of circle between.
The first circular arc distance of center circle between the ball grooves of above-mentioned twice first is less than the second circle between the ball grooves of twice second
Arc distance of center circle, and the ball grooves of twice first the first circular arc center of circle be located at the ball grooves of twice second the second circular arc center of circle between.
The inside of above-mentioned electric machine casing is formed with the end cover of fan being connected with electric machine casing one, the middle part of the end cover of fan
Axle hole with the fixation installation set；The edge of the end cover of fan and the side wall of electric machine casing have and are spaced and constitute wind
Road.
Above-mentioned end cover of fan is formed with least 15 connected guide vanes of one, and each described guide vane is curved, one end
It is connected with the outer wall of end cover of fan, the other end is connected with the madial wall of electric machine casing.
Above-mentioned impeller tool base plate and upper lid, rotating vane is fixed between described base plate and upper lid.
Compared with prior art, a kind of DC micromotor of the present utility model, it is not necessary to use bearing as the company of rotation
Fitting, it is to avoid because fit-up gap causes jumping and rocking for rotating shaft between bearing outer ring, bearing inner race and ball, while saving
Spring between two bearings, simplifies assembling structure, makes the rotating shaft have the advantages that to stablize Jing Yin at high speeds.
Brief description of the drawings
Fig. 1 is the structural representation of rotating shaft in the prior art.
Fig. 2 is the structural representation of rotating shaft in the utility model.
Fig. 3 is the B-B direction profile of Fig. 2.
Fig. 4 is the A portions close-up schematic view in Fig. 3.
Fig. 5 is assembling decomposing schematic representation of the present utility model.
Fig. 6 is cross-sectional view of the present utility model.
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
Embodiment of the present utility model is described in further detail below in conjunction with accompanying drawing.
Fig. 1 to Fig. 8 show structural representation of the present utility model.
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 DC micromotor of the present utility model, including electric machine casing 5 and the stator pack 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 the one of electric machine casing 5, the middle part tool of end cover of fan 51
There is the axle hole 51a for 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 the guide vane 52 around impeller 4 is integrally formed with end cover of fan 51.Before
With the side wall of electric machine casing 5 with being spaced and constituting air channel 54, guide vane 52 is in involute arc, one end and wind at the edge of end cap
The outer wall one of generator terminal lid 51 is connected, and the other end is integrally connected across the madial wall of air channel 54 and electric machine casing 5, leading separately
The wind guide channel 53 that formation is 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 for raising up, the He of base plate 41
Rotating vane 43 is fixed between upper lid 42, rotating vane 43 is being distributed in air inlet 42a peripheries.Rotating shaft 1 can be with impeller 4
Rotated with tens of thousands of rpms of high speed, impeller 4 is sucked air-flow from air inlet 42a by rotating vane 43, and by air-flow to
The wind guide channel 53 of the periphery of impeller 4 is discharged.
The outer wall of end cover of fan 51 is formed with connected 15 to 19 guide vanes 52 of one.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 is with the axle center of rotating shaft 1
The heart is symmetrical, and the radian of each guide vane 52 is in involute, can quickly guide air-flow to be discharged from air channel 54, reduces air-flow
Sound, improves air-flow and passes through efficiency.
When impeller 4 rotates at a high speed, air stream enters impeller 4 from air inlet 42a, and wind guide channel is entered by rotating vane 43
53.Rotating vane 43 is smaller with the spacing distance of guide vane 52, and pneumatic noise is smaller, while air mass flow can be improved.
The end of guide vane 52 extends and is connected with the side wall of electric machine casing 5 in air channel 54 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 close to the entrance of rotating vane 43 and is close to air channel 54
Exit width it is identical.
The first ball grooves 1a of twice annular is formed with 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
A circle ball 11 is provided between pearl groove 1a and the second ball grooves 2a.In the utility model, rotating shaft 1 and installation set 2 are directly constituted and turned
Dynamic pair, need not install bearing additional between.Two circle balls 11 are separately positioned on twice the first ball grooves 1a and the second ball grooves 2a
Between, because rotating shaft 1 and installation set 2 are all rigid bodies, two circle balls 11 are constrained in the stability of high-speed rotation process, significantly
The high speed running performance of rotating shaft 1 is improved, and reduces the influence such as noise.
Retainer 3 is provided between installation set 2 and rotating shaft 1.The body of retainer 3 is annular, has on annular solid and separates
The interval body of each ball 11.Retainer 3 loads from the two ends of installation set 2, and closing set is fixed with again in the end of installation set 2.
The second axial cross section 2b of the first axial cross section 1b and the second ball grooves 2a of the first ball grooves 1a 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.
Any side first axle is to the first circular arc center of circle 1c of section 1b, the second circular arc center of circle 2c of the second axial cross section 2b
The center of circle with ball 11 interlaces out.
In a preferred embodiment, the first circular arc distance of center circle between the first ball grooves of twice 1a is rolled 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 the second ball grooves of twice 2a is located at the ball of twice first
Between the first circular arc center of circle 1c of groove 1a.Therefore, the first circular arc of any side center of circle 1c, the second circular arc center of circle 2c and ball 11
The center of circle is staggered.
In the utility model, because rotating shaft 1 and installation set 2 are all an entirety, two circle balls 11 directly with rotating shaft 1 and peace
Encapsulation 2 is engaged.As shown in figure 4, second circle of the first circular arc center of circle 1c and the second ball grooves 2a of the first ball grooves of twice 1a
Arc center of circle 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
The left side of one ball grooves 1a is engaged, while be engaged with the right side of the second ball grooves 2a, while the ball 11 in left side is just
It is well symmetrical.Because the center of circle at two circle balls 11 is all misaligned, meeting nature is produced to middle constraint under high-speed rotation
Power.
Although the radius of radius ratio ball 11 of the first ball grooves 1a and the second ball grooves 2a is big, there is fit-up gap.But
Ball 11 can still eliminate the influence of fit-up gap after loading, closely match somebody with somebody with the first ball grooves 1a and the second ball grooves 2a automatically
Close.So, when rotating shaft 1 is relative to 2 high-speed rotation of installation set, two circle balls 11 can effectively prevent the leaping up in the axial direction of rotating shaft 1
Dynamic and rocking radially.
In another preferred embodiment, the first circular arc distance of center circle between the first ball grooves of twice 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 the first ball grooves of twice 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, second of any side
Circular arc center of circle 2c is same with the center of circle of ball 11 to be staggered.
Most preferred embodiment of the present utility model has been illustrated, the various change or remodeling made by those of ordinary skill in the art
All without departing from scope of the present utility model.
Claims (9)
1. a kind of DC micromotor, including electric machine casing (5) and stator module and rotor set in electric machine casing (5)
Part, it is characterized in that：Described rotor assembly includes being provided with the rotating shaft (1) of impeller (4) and rotor, the appearance of the rotating shaft (1)
Face interval is formed with first ball grooves (1a) of twice annular, and the outside of the rotating shaft (1) is arranged with an encirclement twice first and rolls
The installation set (2) of pearl groove (1a), the inwall interval of the installation set (2) is formed with corresponding second ball grooves (2a) of twice, in institute
Multiple balls (11) are provided between the first ball grooves (1a) and the second ball grooves (2a) stated.
2. a kind of DC micromotor according to claim 1, it is characterized in that：Described installation set (2) and rotating shaft (1) it
Between be provided with retainer (3), described retainer (3) is with the interval body for separating each ball (11).
3. a kind of DC micromotor according to claim 2, it is characterized in that：The first axle of first ball grooves (1a)
Arc surface is respectively to second axial cross section (2b) of section (1b) and the second ball grooves (2a)；First axial cross section (1b)
Radius and the radius of the second axial cross section (2b) be respectively greater than the radius of ball (11).
4. a kind of DC micromotor according to claim 3, it is characterized in that：First axial cross section described in any side
The first circular arc center of circle (1c) of (1b), the second circular arc center of circle (2c) of the second axial cross section (2b) and the center of circle of ball (11) are distinguished
It is staggered.
5. a kind of DC micromotor according to claim 4, it is characterized in that：Between the ball grooves of the twice first (1a)
The first circular arc distance of center circle more than the second circular arc distance of center circle between the ball grooves of twice second (2a), and the ball grooves of twice second
The second circular arc center of circle (2c) of (2a) is located between the first circular arc center of circle (1c) of the ball grooves of twice first (1a).
6. a kind of DC micromotor according to claim 4, it is characterized in that：Between the ball grooves of the twice first (1a)
The first circular arc distance of center circle less than the second circular arc distance of center circle between the ball grooves of twice second (2a), and the ball grooves of twice first
The first circular arc center of circle (1c) of (1a) is located between the second circular arc center of circle (2c) of the ball grooves of twice second (2a).
7. a kind of DC micromotor according to claim 5 or 6, it is characterized in that：The inside system of the electric machine casing (5)
The middle part for having the end cover of fan (51) being connected with electric machine casing (5) one, the end cover of fan (51) has the fixation installation
Cover the axle hole (51a) of (2)；The edge of the end cover of fan (51) and the side wall of electric machine casing (5) have and are spaced and constitute wind
Road (54).
8. a kind of DC micromotor according to claim 7, it is characterized in that：Described end cover of fan (51) is formed with one
At least 15 connected guide vanes (52), each described guide vane (52) is curved, the outer wall phase of one end and end cover of fan (51)
Even, the other end is connected with the madial wall of electric machine casing (5).
9. a kind of DC micromotor according to claim 8, it is characterized in that：Described impeller (4) have base plate (41) and
Upper lid (42), rotating vane (43) is fixed between described base plate (41) and upper lid (42).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621150660.9U CN206211734U (en) | 2016-10-24 | 2016-10-24 | A kind of DC micromotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621150660.9U CN206211734U (en) | 2016-10-24 | 2016-10-24 | A kind of DC micromotor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206211734U true CN206211734U (en) | 2017-05-31 |
Family
ID=58758729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621150660.9U Withdrawn - After Issue CN206211734U (en) | 2016-10-24 | 2016-10-24 | A kind of DC micromotor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206211734U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106340994A (en) * | 2016-10-24 | 2017-01-18 | 宁波纽新克电机股份有限公司 | Micro direct current motor |
| CN110896253A (en) * | 2019-10-08 | 2020-03-20 | 苏州德能电机股份有限公司 | Quick heat dissipation motor |
-
2016
- 2016-10-24 CN CN201621150660.9U patent/CN206211734U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106340994A (en) * | 2016-10-24 | 2017-01-18 | 宁波纽新克电机股份有限公司 | Micro direct current motor |
| CN110896253A (en) * | 2019-10-08 | 2020-03-20 | 苏州德能电机股份有限公司 | Quick heat dissipation motor |
| CN110896253B (en) * | 2019-10-08 | 2022-02-11 | 苏州德能电机股份有限公司 | Quick heat dissipation motor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102782333B (en) | Centrifugal blower assembly | |
| US9869319B2 (en) | Vacuum pump | |
| CN102454620B (en) | Air supply fan | |
| EP3147510B1 (en) | Coreless donut-type motor fan for ventilation and cooling | |
| CN206575273U (en) | A kind of direct current induced-draught electric motor | |
| CN107532614A (en) | Centrifugal blower and dust catcher | |
| CN206211734U (en) | A kind of DC micromotor | |
| CN107461354A (en) | A kind of shaftless blower fan of wheel rim drive-type | |
| CN106787395A (en) | A kind of direct current induced-draught electric motor | |
| CN206211737U (en) | A kind of Miniature digital direct current generator | |
| CN208522602U (en) | Motor and rotating screw device | |
| CN101790640B (en) | Vertical axis dual vortex downwind inward flow impulse wind turbine | |
| US20150093267A1 (en) | Centrifugal Impeller and Centrifugal Blower | |
| KR20150072466A (en) | generator with roof exhaust fan | |
| CN109477496A (en) | Electric blowing machine and electrical equipment | |
| CN206481170U (en) | A kind of rotor assembly of direct current generator | |
| CN106374671A (en) | Rotor assembly of DC motor | |
| CN106411026B (en) | A kind of Miniature digital direct current generator | |
| CN109798259B (en) | High-speed fan motor | |
| CN106340994B (en) | A kind of miniature DC motor | |
| CN201750290U (en) | Novel cooling-mode DC dust collector motor | |
| CN209875503U (en) | High-speed fan motor | |
| KR101459061B1 (en) | High-speed multi-stage blower | |
| US20090257876A1 (en) | Blower Impeller with Partial Tip Blockage | |
| TW202023151A (en) | Motor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170531 Effective date of abandoning: 20190205 |