CN2770203Y - Small-sized motor - Google Patents
Small-sized motor Download PDFInfo
- Publication number
- CN2770203Y CN2770203Y CN 200520002763 CN200520002763U CN2770203Y CN 2770203 Y CN2770203 Y CN 2770203Y CN 200520002763 CN200520002763 CN 200520002763 CN 200520002763 U CN200520002763 U CN 200520002763U CN 2770203 Y CN2770203 Y CN 2770203Y
- Authority
- CN
- China
- Prior art keywords
- rotor
- fixed
- drop
- proof component
- magnet
- 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.)
- Expired - Lifetime
Links
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 9
- 239000013536 elastomeric material Substances 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 3
- 239000013013 elastic material Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 9
- 238000005452 bending Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- XEEYBQQBJWHFJM-BJUDXGSMSA-N Iron-55 Chemical compound [55Fe] XEEYBQQBJWHFJM-BJUDXGSMSA-N 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Images
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- Motor Or Generator Frames (AREA)
- Brushless Motors (AREA)
Abstract
A small-sized motor is composed of a rotor (11) and a stator (12), wherein the rotor comprises a rotating shaft (13), a rotor frame (14) fixed on the rotating shaft, an attraction magnet (18) fixed on the upper part of the rotor frame, a slip-off preventing component (19) made of elastic material and fixed on the rotor frame, and a rotor magnet (15) fixed on the rotor frame; the stator comprises a base (21), a housing (24) fixed on the base and holding a bearing (25), and a stator core (22) arranged opposite to the rotor magnet, and is characterized in that a retaining member (19) is provided with a fixing part (19a) fixed on the upper end surface of the rotor frame, an engaging part (19c) at the lower end part, an engaged part (24c) with an outward opening shape at the upper end part of the housing, and a retaining mechanism (27) of the rotor is formed by engaging the engaging parts.
Description
Technical field
The utility model relates to the drop-proof structure of the rotor of the miniature motor that the disc that makes Mini Disc, CD etc. is rotated.
Background technology
In the miniature motor that the disc that makes Mini Disc, CD etc. is rotated, need prevent that the rotor when load when the magnetic attracting force that makes rotor magnet and stator core improves puts on motor from coming off.Again, these equipment drive on the rotary body for the disc with Mini Disc, CD etc. is installed in, and are fixed on the rotor of motor with the method for clamping of magnetic etc.Therefore, the structure that when the loading and unloading of medium rotor is come off from stator is indispensable.
Because such necessity in miniature motor, has generally been added the drop-proof structure of rotor.Drop-proof structure is located at the portion of being stuck on the case, and drop-proof component is located at the rotor portions relative with case, the general structure that they are engaged that adopts.As the documents and materials relevant with the application's utility model, for example known have a flat 10-23702 communique of Japanese Patent Application Laid-Open.Also know to have groove is located on the part of rotating shaft, makes structure that drop-proof component engages with this groove etc. again.
Fig. 4 represents the structure of miniature motor in the past.Miniature motor in the past shown in Figure 4 is made of rotor 51 and stator 52.The rotating shaft 53 of rotor 51 is fixed on the rotor frame 54, in addition, columnar rotor magnet 56 is installed at rotor yoke iron 55 and on interior week.Be provided with the attraction magnet 57 that medium is clamped usefulness on the top of rotor frame 54 again.
On the other hand, the case 62 of stator 52 is installed on the pedestal 61, and perimembranous is installed with bearing 52 within it, and rotating shaft 53 rotations are kept freely.Again,, fixing stator core 64 with coil 65 at the outer circumferential side of case 62, and relative with rotor magnet 56.Again, be provided with axial thrust bearing 66, become and the preceding end in contact of rotating shaft 53 and the structure of bearing axial load in the bottom of case 62.
Here, the drop-proof component 58 by elastomeric material constitutes is fixed on the rotor frame 54 with suitable method.Drop-proof component 58 has holding section 58a at its front end, on the other hand, has the 62a of the portion that is stuck to foreign side's expanded shape in the upper end of case 62.
The rotating shaft 53 of the rotor after finishing 51 vertically is inserted in stator 52 bearings 63 after finishing.At this moment, the 62a of the portion that the is stuck butt of the holding section 58a of drop-proof component 58 and case 62 by further pushing, utilizes the elastic reaction of drop-proof component 58 to open to foreign side's expansion, can cross over the 62a of the portion that is stuck of case 62.Drop-proof component 58, with the non-contacting state of the 62a of the portion that is stuck of case 62 under finish assembling.After assembling was finished, the holding section 58a by drop-proof component 58 engaged with the 62a of the portion that is stuck of case 62, becomes drop-proof structure.
But, in above-mentioned structure in the past, owing to the outside of drop-proof component 58 from motor is difficult to operate, so have the decomposition after the assembling, the big problem that maintenance becomes difficulty.Again, owing to drop-proof component 58 is housed in the very narrow and small gap of rotor frame 54 and stator core 64, so there is the elastic problem that is difficult to suitably set drop-proof component 58, also, be difficult to the bending angle is maintained at high-precision problem because of comprising the bending operation so exist because drop-proof component 58 is generally formed by the punch process of metallic plate.
Technology contents
Miniature motor of the present utility model, be that rotor and stator combination are formed, described rotor comprises rotating shaft, be fixed on rotor frame on this rotating shaft, be fixed on the top of this rotor frame attraction magnet, constitute and be fixed on drop-proof component on the rotor frame, be fixed on the rotor magnet on the rotor frame with elastomeric material; Described stator comprises pedestal, be fixed on this pedestal and case that bearing is kept, the stator core of relatively disposing with rotor magnet, with following structures as feature.
Drop-proof component, its fixed part is fixed on the upper surface of rotor frame, is provided with the holding section in its bottom, and to be provided with shape in the upper end of case be to the open portion that is stuck of foreign side, by they being engaged the anti-avulsion mechanism that forms rotor.
In addition, drop-proof component in another embodiment, the angle that its fixed part and its line part constituted makes before the installation of described attraction magnet more than 90 degree.Not installing under the state that attracts magnet, rotor is installed on the stator.At this moment, can be not install with the portion that the is stuck butt ground of the upper end of case the holding section of drop-proof component, and then, by to attracting magnet to install, the angle that fixed part and its line part constituted of drop-proof component is constrained to roughly 90 and spends.
Adopt such structure, the utility model can provide and decompose after assembling easily and be easy to miniature motor that the size of drop-proof component is adjusted and elasticity is set.
Description of drawings
Fig. 1 is the cutaway view of the miniature motor of embodiment 1 of the present utility model.
Fig. 2 is the cutaway view of the miniature motor of embodiment 2 of the present utility model.
Fig. 3 is the key diagram in the assembling way of miniature motor of embodiment 2 of the present utility model.
Fig. 4 is the cutaway view of miniature motor in the past.
Embodiment
[embodiment 1]
Below, with reference to accompanying drawing embodiment 1 of the present utility model is described.Fig. 1 is the cutaway view of miniature motor of the present utility model.Among Fig. 1, the miniature motor of present embodiment is the brushless motor of the outer-rotor type that is made of rotor 11 and stator 12.Rotor 11 engages rotating shaft 13 by retaining member 16 with the rotor frame 14 of cup-shaped.In the interior week of rotor frame 14, rotor magnet 15 cylindraceous is being fixed by yoke member 20 and with means such as bonding.To attract magnet 18 to be fixed on the top of rotor frame 14 with means such as bonding again.
On the other hand, cylindric case 24 usefulness of stator 12 mode such as are pressed into and engage with pedestal 21, also with being pressed into the means that wait bearing 25 are fixed on the inside of case 24, rotating shaft 13 are rotated keep freely.Again,, fixing stator core 22 with coil 23 at the outer circumferential side of case 24, and relative with rotor magnet 15.Again, be provided with axial thrust bearing 26, become and the preceding end in contact of rotating shaft 13 and the structure of bearing axial load at the central portion of pedestal 21.
Here, on the fixed part 17 of being located at rotor frame 14 tops, the bonding or screw of drop-proof component 19 usefulness is fastening etc., and method is fixed.Drop-proof component 19 is elastomeric material to be carried out punch process form, and its cross section is made of fixed part 19a, line part 19b, holding section 19c.The relative line part 19b of fixed part 19a is bent into roughly 90 degree.Again, 19c relative line part 19b in holding section is bent into such shape of turning back circular-arcly.Or the section shape of this holding section 19c also can be the acutangulate rectilinear form of relative line part 19b bending.That is, holding section 19c and line part 19b constitute angle of section becomes below 90 degree.
Again, case 24 end thereon has the 24c of the portion of being stuck, and the cross section becomes to the circular-arc shape of foreign side's flare up.This cross sectional shape also can be that relative case 24 has the rectilinear form of 90 degree with upper angle.
Then, the assemble method of rotor 11 with stator 12 described.The rotating shaft 13 of the rotor after finishing 11 vertically is inserted in the bearing 25 of the stator 12 after finishing.At this moment, the 24c of the portion that the is stuck butt of the holding section 19c of drop-proof component 19 and case 24 by further pushing, utilizes the elastic reaction of drop-proof component 19 to open to foreign side's expansion, can cross over the 24c of the portion that is stuck of case 24.Drop-proof component 19, with the non-contacting state of the 24c of the portion that is stuck of case 24 under, finish assembling.After assembling was finished, the holding section 19c by drop-proof component 19 engaged with the 24c of the portion that is stuck of case 24, becomes anti-avulsion mechanism 27.
In order to revise defective products, when taking place to need to decompose, with fixedly removing of the fixed part 19a of drop-proof component 19, by with fixed part 19a pull-up and can be with rotor 11 from stator 12 dismountings.
In addition, above explanation the brushless motor of outer-rotor structure is described, but the utility model is not limited to this structure, also can be widely applicable for the miniature motor of other kind.
[embodiment 2]
Below, with reference to accompanying drawing embodiment 2 of the present utility model is described.Fig. 2 is the cutaway view of the miniature motor of embodiment 2 of the present utility model, and Fig. 3 is the key diagram in the assembling way.Among Fig. 2, the miniature motor of embodiment 2 is the brushless motor of the outer-rotor type that is made of rotor 31 and stator 32.Rotor 31 is engaging rotating shaft 33 by retaining member 36 with the rotor frame 34 of cup-shaped.In the interior week of rotor frame 34, rotor magnet 35 cylindraceous is being fixed by yoke member 40 and with means such as bonding.Again, means will attract magnet 38 to be fixed on the top of rotor frame 34 with bonding or screw is fastening etc.
On the other hand, stator 32 engages case 44 cylindraceous with being pressed into the means that wait with pedestal 41, and also the means that are pressed into etc. of usefulness are fixed on the inside of case 44 with bearing 45, rotating shaft 33 is rotated keep freely.Again,, fixing stator core 42 with coil 43 at the outer circumferential side of case 44, and relative with rotor magnet 35.Again, be provided with axial thrust bearing 46, become and the preceding end in contact of rotating shaft 33 and the structure of bearing axial load at the central portion of pedestal 41.
Here, on the fixed part 37 on the top of being located at rotor frame 34, drop-proof component 39 is being mounted.Drop-proof component 39 carries out punch process with elastomeric material and makes, and its section is made of fixed part 39a, line part 39b, holding section 39c.Line part 39b is attracted the interior week restriction of magnet 38, and the 39a of relative fixed portion is bent into roughly 90 degree.Again, 39c relative line part 39b in holding section is bent into such shape of turning back circular-arcly.Or the cross sectional shape of this holding section 39c also can be the acutangulate rectilinear form of relative line part 39b bending.That is, holding section 39c and line part 39b constitute angle of section becomes below 90 degree.
Again, case 44 end thereon has the 44c of the portion of being stuck, and its cross sectional shape becomes that relative case 24 has the following angle of 90 degree and to the open shape of foreign side.
Then, Fig. 3 is the key diagram in the assembling way of expression present embodiment, with this figure assemble method is described.The angle of the line part 39b of drop-proof component 39 relative its fixed part 39a is set roughly 100 degree for greater than 90 degree.Therefore, assemble in front to the open shape of foreign side.Under this state, rotor 31 is installed on the stator 32.Because the holding section 39c of drop-proof component 39 opens to foreign side, so can successfully not insert with the 44c of the portion that the is stuck butt of case 44.Then, will attract magnet 38 to be installed in the top of rotor frame 34.At this moment, the interior perimembranous 38a that is attracted magnet 38 that opens of drop-proof component 39 limits, and the angle of the line part 39b relative with its fixed part 39a becomes roughly 90 degree.Thus, the holding section 39c of drop-proof component 39, with the 44c of the portion that is stuck of case 44 with non-contacting state engage form till off line structure 47.
Again, attract magnet 38, the method fastening etc. with bonding or screw is installed on the rotor frame 34.Drop-proof component 39 if size is strictly controlled, also can not be fixed on the rotor frame 34.
For with the defective products correction etc., take place to decompose need the time, will attract fixedly removing of magnet 38.The holding section 39c of drop-proof component 39 opens to foreign side's expansion owing to utilize the elastic recovery effect, rotor 31 successfully can be dismantled from stator 32.
In addition, in the present embodiment, the holding section 39c of drop-proof component 39 needs not be the shape of being with fillet, as long as relative line part 39b is just passable below 90 degree.Again, the 44c of the portion that is stuck of case 44 too, as long as relative line part 39b be 90 the degree below just passable.
In addition, above explanation the brushless motor of outer-rotor structure is described, but the utility model is not limited to this structure, also can be widely applicable for the miniature motor of other kind.
Claims (6)
1, a kind of miniature motor, form by rotor and stator combination, described rotor comprises rotating shaft, be fixed on rotor frame on the described rotating shaft, be fixed on the top of described rotor frame attraction magnet, constitute and be fixed on drop-proof component on the described rotor frame, be fixed on the rotor magnet on the described rotor frame with elastomeric material; Described stator comprises pedestal, be fixed on the described pedestal and case that bearing is kept, with the stator core that described rotor magnet relatively disposes, it is characterized in that,
Described drop-proof component, its fixed part is fixed on the upper surface of described rotor frame, be provided with the holding section in its bottom, and be provided with shape to the open portion that is stuck of foreign side, by they being engaged the anti-avulsion mechanism that forms rotor in the upper end of described case.
2, miniature motor as claimed in claim 1 is characterized in that, described drop-proof component, and the cross section of its holding section is a circular shape.
3, miniature motor as claimed in claim 1 is characterized in that, it is below 90 degree that described drop-proof component, its holding section and its line part constitute angle of section.
4, miniature motor as claimed in claim 1 is characterized in that, described drop-proof component, and the angle that its fixed part and its line part constitute is more than 90 degree before the installation of described attraction magnet.
5, miniature motor as claimed in claim 4 is characterized in that, described drop-proof component, and the angle that its fixed part and its line part constitute, the installation by described attraction magnet is constrained to 90 degree.
6, miniature motor as claimed in claim 4 is characterized in that, described rotor, can make described drop-proof component not with the portion that the is stuck butt of described case be installed on the stator.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004137413 | 2004-05-06 | ||
| JP2004137413A JP2005323420A (en) | 2004-05-06 | 2004-05-06 | Brushless motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2770203Y true CN2770203Y (en) | 2006-04-05 |
Family
ID=35470276
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520002763 Expired - Lifetime CN2770203Y (en) | 2004-05-06 | 2005-02-28 | Small-sized motor |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2005323420A (en) |
| CN (1) | CN2770203Y (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8156513B2 (en) | 2009-08-21 | 2012-04-10 | Nidec Corporation | Motor and storage disk drive apparatus |
| CN101996656B (en) | 2009-08-21 | 2013-03-20 | 日本电产株式会社 | Motor, storage disk drive apparatus and motor manufacturing method |
-
2004
- 2004-05-06 JP JP2004137413A patent/JP2005323420A/en not_active Withdrawn
-
2005
- 2005-02-28 CN CN 200520002763 patent/CN2770203Y/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP2005323420A (en) | 2005-11-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20150228 Granted publication date: 20060405 |