CN206481170U - A kind of rotor assembly of direct current generator - Google Patents
A kind of rotor assembly of direct current generator Download PDFInfo
- Publication number
- CN206481170U CN206481170U CN201621150672.1U CN201621150672U CN206481170U CN 206481170 U CN206481170 U CN 206481170U CN 201621150672 U CN201621150672 U CN 201621150672U CN 206481170 U CN206481170 U CN 206481170U
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- CN
- China
- Prior art keywords
- ball grooves
- circle
- twice
- rotor assembly
- ball
- 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- Withdrawn - After Issue
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Abstract
The utility model discloses a kind of rotor assembly of direct current generator, including rotating shaft.The first ball grooves of twice annular are formed with the outer surface interval of rotating shaft, the outer cover of the rotating shaft is provided with the installation set for surrounding the ball grooves of twice first, the inwall interval of the installation set is formed with corresponding second ball grooves of twice, provided with a circle ball between described the first ball grooves and the second ball grooves.A kind of rotor assembly of direct current generator 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 rotor assembly of direct current generator.
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 high rotating speed, 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, noise is produced.
Number of patent application discloses a kind of rotor assembly for 201280041747.0 patent of invention, 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 to by cover in bearing assembly, impeller is rotated freely through relative to cover.Due to one of cover formation 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 gap well limited between impeller and cover.Especially, gap can not be by turbine
The installation or alignment influence of rotor assembly in machine.
As shown in figure 1, the component of bearing 91 disclosed in the patent may include the bearing spaced apart surrounded by sleeve 9 for a pair
91.This, which is covered in, 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, the bearing 91 spaced apart that is surrounded by sleeve 9 is arranged
Apply the rigidity for adding rotor assembly, itself so that cause higher first to bend frequency.Therefore, the rotor assembly can make more
Operated at high subcritical speed.
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, between the outer ring that two bearings 91 are made by spring 92
There is repulsion, to offset the power that jumps of a part.Although the prior art greatly improves the performance of rotor 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 to be directed to above-mentioned state of the art, and provides a kind of direct current generator
Rotor assembly, enormously simplify the structure of revolute pair, it is to avoid jump and rock caused by bearing, greatly improve rotor assembly
Stability and quietness under high-speed rotation.
The utility model solve the technical scheme that is used of above-mentioned technical problem for：A kind of rotor assembly of direct current generator,
Including rotating shaft, the outer surface interval of the rotating shaft is formed with the first ball grooves of twice annular, and the outer cover of the rotating shaft is provided with bag
The installation set of the ball grooves of twice first is enclosed, the inwall interval of the installation set is formed with corresponding second ball grooves of twice,
Provided with a circle ball between the first described ball grooves and the second ball grooves.
For 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.
The radius of above-mentioned first axial cross section and the radius of the second axial cross section are respectively greater than the radius of ball.
The first circular arc center of circle of the first axial cross section, the second circular arc center of circle of the second axial cross section and rolling described in any side
The center of circle of pearl interlaces out.
The first circular arc distance of center circle between the above-mentioned ball grooves of 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 above-mentioned ball grooves of 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 upper end of above-mentioned rotating shaft is connected with impeller, and lower end is provided with rotor；Described impeller has bottom plate and upper lid, described
Bottom plate and upper lid between be fixed with rotating vane.
Above-mentioned installation set is fixed in the installation cavity of electric machine casing.
Compared with prior art, the rotor assembly of a kind of direct current generator of the present utility model, it is not necessary to use bearing conduct
Rotating connector, it is to avoid because fit-up gap causes jumping and rocking for rotating shaft between bearing outer ring, bearing inner race and ball, together
When save spring between two bearings, simplify assembling structure, make 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 Fig. 2 B-B direction profile.
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 Fig. 6 C-C to profile.
Fig. 8 is the structural representation of guide vane in Fig. 5.
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, bottom 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 utility model, including electric machine casing 5 and determining in electric machine casing 5
Sub-component 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 guide vane 52 being integrally formed with the outside of end cover of fan 51, end cover of fan 51 around impeller 4.Before
The edge of end cap has with the side wall of electric machine casing 5 is spaced and constitutes air channel 54, and guide vane 52 is in involute arc, one end and wind
The outer wall of generator terminal lid 51 is integrally connected, and the madial wall of the other end across air channel 54 and electric machine casing 5 is integral to be connected, leading separately
The wind guide channel 53 being connected with air channel 54 is formed between wind piece 52.
Impeller 4 has bottom plate 41 and upper lid 42, and the center of upper lid 42 is formed with the air inlet 42a raised up, the He of bottom 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, the minimum separation distances of rotating vane 43 and guide vane 52 are less than or equal to 0.4mm.Guide vane 52 is using the axle center of rotating shaft 1 in
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 discharged into by rotating vane 43
53.The spacing distance of rotating vane 43 and guide vane 52 is smaller, and pneumatic noise is smaller, while air mass flow can be improved.
The end of guide vane 52 extends into air channel 54 and is connected with the side wall of electric machine casing 5 in air channel 54.Each is led
Wind piece 52 is equidistantly arranged on the outer wall of end cover of fan 51, entrance and close air channel 54 of the wind guide channel 53 close to rotating vane 43
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 outer cover of rotating shaft 1 is provided with encirclement two
Road the first ball grooves 1a installation set 2, the inwall interval of installation set 2 is formed with the corresponding second ball grooves 2a of twice, in the first rolling
Provided with a circle ball 11 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, is fixed with closing set again in the end of installation set 2.
First ball grooves 1a the first axial cross section 1b and the second ball grooves 2a the second axial cross section 2b are respectively circular arc
Face.First axial cross section 1b radius and the second axial cross section 2b radius are respectively greater than the radius of ball 11.
Any side first axle is to section 1b the first circular arc center of circle 1c, the second axial cross section 2b the second circular arc center of circle 2c
Interlaced out with the center of circle of ball 11.
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 ball grooves of twice 2a the second circular arc center of circle 2c is located at the ball of twice first
Between groove 1a the first circular arc center of circle 1c.Therefore, any the first circular arc of 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, the first ball grooves of twice 1a the first circular arc center of circle 1c and the second ball grooves 2a the second circle
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
One ball grooves 1a left side is engaged, while being engaged with the second ball grooves 2a right side, 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 first ball grooves 1a and the second ball grooves 2a radius of radius ratio ball 11 is big, there is fit-up gap.But
Ball 11 can still eliminate the influence of fit-up gap after loading, and 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 ball grooves of twice 1a the first circular arc center of circle 1c is located at twice
Between second ball grooves 2a the second circular arc center of circle 2c.In this embodiment, the first circular arc center of circle 1c of any side, second
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 rotor assembly of direct current generator, including rotating shaft (1), it is characterized in that：The outer surface interval of the rotating shaft (1) is formed with
The first ball grooves (1a) of twice annular, the outer cover of the rotating shaft (1) is provided with the encirclement ball grooves of twice first (1a)
Installation set (2), the inwall interval of the installation set (2) is formed with corresponding second ball grooves (2a) of twice, in the first described rolling
Provided with a circle ball (11) between pearl groove (1a) and the second ball grooves (2a).
2. a kind of rotor assembly of direct current generator according to claim 1, it is characterized in that：Described installation set (2) is with turning
Retainer (3) is provided between axle (1), described retainer (3) has the interval body for separating each ball (11).
3. a kind of rotor assembly of direct current generator according to claim 2, it is characterized in that：First ball grooves (1a)
The second axial cross section (2b) of first axial cross section (1b) and the second ball grooves (2a) is respectively arc surface.
4. a kind of rotor assembly of direct current generator according to claim 3, it is characterized in that：First axial cross section (1b)
Radius and the radius of the second axial cross section (2b) be respectively greater than the radiuses of ball (11).
5. a kind of rotor assembly of direct current generator according to claim 4, it is characterized in that：First axially described in any side
The first circular arc center of circle (1c) in section (1b), the second circular arc center of circle (2c) of the second axial cross section (2b) and the center of circle of ball (11)
Interlace out.
6. a kind of rotor assembly of direct current generator according to claim 5, it is characterized in that：The ball grooves of twice first
The first circular arc distance of center circle between (1a) is more than the second circular arc distance of center circle between the ball grooves of twice second (2a), and twice second
The second circular arc center of circle (2c) of ball grooves (2a) is located between the first circular arc center of circle (1c) of the ball grooves of twice first (1a).
7. a kind of rotor assembly of direct current generator according to claim 5, it is characterized in that：The ball grooves of twice first
The first circular arc distance of center circle between (1a) is less than the second circular arc distance of center circle between the ball grooves of twice second (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 the ball grooves of twice second (2a).
8. a kind of rotor assembly of direct current generator according to claim 6 or 7, it is characterized in that：The upper end of the rotating shaft (1)
Impeller (4) is connected with, lower end is provided with rotor；Described impeller (4) has bottom plate (41) and upper lid (42), described bottom plate
(41) it is fixed with rotating vane (43) between upper lid (42).
9. a kind of rotor assembly of direct current generator according to claim 8, it is characterized in that：Described installation set (2) is fixed
In the installation cavity of electric machine casing (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621150672.1U CN206481170U (en) | 2016-10-24 | 2016-10-24 | A kind of rotor assembly of direct current generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621150672.1U CN206481170U (en) | 2016-10-24 | 2016-10-24 | A kind of rotor assembly of direct current generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206481170U true CN206481170U (en) | 2017-09-08 |
Family
ID=59755754
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621150672.1U Withdrawn - After Issue CN206481170U (en) | 2016-10-24 | 2016-10-24 | A kind of rotor assembly of direct current generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206481170U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106374671A (en) * | 2016-10-24 | 2017-02-01 | 宁波纽新克电机股份有限公司 | Rotor assembly of DC motor |
-
2016
- 2016-10-24 CN CN201621150672.1U patent/CN206481170U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106374671A (en) * | 2016-10-24 | 2017-02-01 | 宁波纽新克电机股份有限公司 | Rotor assembly of DC motor |
| CN106374671B (en) * | 2016-10-24 | 2019-02-05 | 宁波纽新克电机股份有限公司 | A kind of rotor assembly of direct current generator |
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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: 20170908 Effective date of abandoning: 20190205 |