CN201639401U - Micro-motor with axial air gap - Google Patents
Micro-motor with axial air gap Download PDFInfo
- Publication number
- CN201639401U CN201639401U CN2010201105065U CN201020110506U CN201639401U CN 201639401 U CN201639401 U CN 201639401U CN 2010201105065 U CN2010201105065 U CN 2010201105065U CN 201020110506 U CN201020110506 U CN 201020110506U CN 201639401 U CN201639401 U CN 201639401U
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- Prior art keywords
- gap
- axle bed
- axial air
- bearing
- central siphon
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Abstract
The utility model discloses a micro-motor with an axial air gap, comprising a base, a coil assembly and a rotor, wherein, the base is provided with a shaft tube, one end of the shaft tube is shaped as an open end flange; the coil assembly is arranged on the base; the rotor is provided with a containing hole and a permanent magnet; a shaft support and a circular slot are arranged inside the containing hole; the shaft support is combined with a central shaft; the circular slot is encircled around the periphery of the shaft support; the central shaft is combined with the bearing of the base; the circular slot is provided with a datum plane facing the bearing; an axial air gap is arranged between the permanent magnet and the coil assembly; the shaft tube of the base is put through the containing hole of the rotor; the open end flange of the shaft tube is corresponded to the datum plane of the circular slot and a space is left between the open end flange and the datum plane, thereby the space forms a safety distance and ensures the rotor not to collide with the shaft tube in the rotation process.
Description
Technical field
The utility model is about a kind of motor, especially a kind of micro motor with axial air-gap.
Background technology
Please refer to shown in Figure 1, for the U.S. announces " the rotating shaft combined structure (SHAFT COUPLING ARRANGEMENT INCLUDINGOIL SLEEVE BEARING AND OIL SUPPLY) with oiliness bearing and fueller " patent case No. 6024496.Should comprise a pedestal 81 and a rotor 82 by existing motor 8; This pedestal 81 is provided with a central siphon 811, is provided with an oiliness bearing 812 in this central siphon 811; This rotor 82 has a wheel hub 821, and these wheel hub 821 inboards are provided with an axle bed 822, and this axle bed 822 can supply in conjunction with a rotating shaft 823, and this rotating shaft 823 is rotatably in conjunction with this oiliness bearing 812; In addition, the outer peripheral face of this central siphon 811 can supply in conjunction with a coil groups (not illustrating), these wheel hub 821 inboards can be for being provided with and the diametrically opposed permanent magnet (not illustrating) of this coil groups, has a radial air gap between this coil groups and this permanent magnet, whereby, can produce magnetic field after this coil groups energising, this magnetic field is by this radial air gap and this permanent magnet generation effect, to drive this rotor 82 rotary works.
Yet above-mentioned existing motor 8 with radial air gap still has the excessive and axial height of volume and is difficult for problems such as reduction.Generally under the precondition of directions such as microminiaturized trend research and development design, this existing motor 8 with radial air gap is difficult for being applied to various microminiaturized electronic product, for example: mobile phone, personal digital assistant (PDA) etc. at electronic product now.
For the motor configuration that more is applicable to microminiaturized trend is provided, present micro motor field is haply to have the motor configuration of axial air-gap.For example, as shown in Figure 2, be No. 97128615 " mini-fan " patent of TaiWan, China application case.It discloses the another kind of existing motor 9 that is applied to mini-fan, and this existing motor 9 comprises a pedestal 91, a coil groups 92, a rotor 93 and a permanent magnet 94.This pedestal 91 is provided with a central siphon 911, is provided with a bearing 912 in this central siphon 911; This coil groups 92 is arranged on this pedestal 91; This rotor 93 has an axle bed 931, this axle bed 931 extends axially out a loop portions 932 towards this pedestal 91, and the center of this axle bed 931 is provided with a central shaft 933, and this central shaft 933 rotatably is incorporated into this bearing 912, and makes this central siphon 911 can be contained in this loop portions 932 inboards relatively; This permanent magnet 94 is incorporated into loop portions 932 outer peripheral faces of this rotor 93, has an axial air-gap between this permanent magnet 94 and this coil groups 92; Whereby, can produce magnetic field after these coil groups 92 energisings, this magnetic field is by this axial air-gap and the 94 generation effects of this permanent magnet, to drive this rotor 93 rotary works.
Compared to the existing motor 8 with radial air gap, above-mentioned characteristics with existing motor 9 of axial air-gap are: can utilize the axial air-gap design between this permanent magnet 94 and this coil groups 92, with the overall volume of this existing motor 9 of effective reduction; In addition, because this central siphon 911 can directly be contained in this loop portions 932 inboards, therefore, the top of this central siphon 911 can comparatively be close to this axle bed 931, further to reduce the axial height of this motor 9; Whereby, but these existing motor 9 broader applications with axial air-gap in various microminiaturized electronic product.
Yet, please refer to shown in Fig. 2 and 3, should have motor 9 now after actual assembled, central horizontal when this rotor 93 is installed with this central siphon 911 proofread and correct problem, central siphon 911 whether deflection, bearing 912 various factors such as select for use, all may cause this coil groups 92 when this rotor 93 of driving begins to rotate or in the rotary course, produce the situation of slightly beat as shown in Figure 3; The central siphon 911 that wherein should have motor 9 now directly is contained in this loop portions 932 inboards, to reach the purpose of reduction axial height, because the top of this central siphon 911 is close to this axle bed 931, therefore, when this rotor 93 because of spinning movement slightly during beat, 931 tops of colliding this central siphon 911 quite easily of the axle bed of this rotor 93 cause this motor 9 to produce situations such as noise even damage.
For improving this problem, the axle bed 931 of supposing suitably to strengthen this rotor 93 and the top of this central siphon 911 apart from the time (for example increasing central shaft 933 length), can cause the axial height of this motor 9 to increase on the contrary, violate the original idea that original desire reduces axial height; Again, suppose suitably to reduce the axial height of this axle bed 931, under the condition of the axial height that does not increase this motor 9, when the distance on this axle bed 931 and the top of this central siphon 911 is increased, cause the bonded area deficiency of this axle bed 931 and this central shaft 933 on the contrary easily; Therefore, all non-suitable mode that can improve problem fully of aforesaid way.
The utility model content
The purpose of this utility model is to improve at above-mentioned shortcoming with existing micro motor of axial air-gap, it mainly is not increase axial height and do not reducing under the condition of axle bed and central shaft bonded area, provide a kind of and can guarantee rotor in rotary course, be difficult for the micro motor of collision central siphon.
As follows for reaching the technological means that aforementioned utility model purpose used:
A kind of micro motor with axial air-gap comprises: a pedestal, have a surface, and this surface is provided with a central siphon, and this central siphon one end forms an opening, and this open circumferential is an opening ora terminalis, and a bearing is set in this central siphon; One coil groups is arranged at this pedestal; And a rotor, having a medial surface, this medial surface is provided with a containing hole and a permanent magnet, and this containing hole has relative a blind hole portion and an opening portion in the axial direction; This blind hole portion is provided with an axle bed and an annular groove, and this axle bed is in conjunction with a central shaft, and this annular groove is around the neighboring of this axle bed; Wherein, this central shaft is in conjunction with the bearing of this pedestal, this central shaft axially on, this annular groove has the datum level in the face of this bearing, have an axial air-gap between this permanent magnet and this coil groups, the medial surface of this rotor and opening portion are towards the surface of this pedestal, and the central siphon of this pedestal is contained in the containing hole of this rotor, the datum level of this annular groove of opening ora terminalis contraposition of this central siphon has a spacing between this opening ora terminalis and this datum level.
The beneficial effect that the utlity model has the micro motor of axial air-gap is, by formed axial air-gap between this coil groups and this permanent magnet, and the central siphon of this pedestal can stretch to the structural designs such as containing hole of this rotor, with effective reduction volume and reduce axial height.Moreover, in the basic structure of above-mentioned micro motor, the utility model further utilizes the annular groove of this rotor of opening ora terminalis contraposition of this central siphon, make have between this opening ora terminalis and this annular groove spacing with form safe distance architectural feature, and then provide a kind of and can guarantee that this rotor is in rotary course, the micro motor that is difficult for this central siphon of collision is conveniently to be applied to various microminiaturized electronic product.
Description of drawings
Fig. 1: existing assembled sectional view with motor of radial air gap.
Fig. 2: existing assembled sectional view with motor of axial air-gap.
Fig. 3: the existing action schematic diagram of motor in the course of work with radial air gap.
Fig. 4: the three-dimensional exploded view that the utlity model has the micro motor of axial air-gap.
Fig. 5: the assembled sectional view that the utlity model has the micro motor of axial air-gap.
Fig. 6: the action schematic diagram of micro motor in the course of work that the utlity model has axial air-gap.
Fig. 7: the micro motor that the utlity model has axial air-gap has the three-dimensional exploded view of buckle end.
Fig. 8: the micro motor that the utlity model has axial air-gap has the assembled sectional view of buckle end.
Fig. 9: the micro motor that the utlity model has axial air-gap has the assembled sectional view of extension.
Figure 10: the utlity model has the assembled sectional view of the micro motor of axial air-gap as radiator fan.
The main element symbol description:
1 pedestal, 11 surperficial 12 central siphons, 121 opening ora terminalis
131 bearing faces, 2 coil groups, 21 coils, 22 substrates
3 rotors, 31 medial surfaces, 32 containing holes, 321 blind hole portions
322 opening portions, 33 axle beds, 331 axle bed end faces, 34 annular grooves
341 datum levels, 35 central shafts, 36 permanent magnets, 37 blades
4 frameworks, 41 connectors, 42 air intake vents, 43 air outlets
8 motors, 81 pedestals, 811 central siphons, 812 oiliness bearings
823 rotating shafts of 82 rotors, 821 wheel hubs, 822 axle beds
9 motors, 91 pedestals, 911 central siphons, 912 bearings
92 coil groups, 93 rotors, 931 axle beds, 932 loop portions
933 central shafts, 94 permanent magnets
Embodiment
For above-mentioned and other purpose of the present utility model, feature and advantage can be become apparent, preferred embodiment of the present utility model cited below particularly, and conjunction with figs. are described in detail below:
Please refer to shown in Fig. 4 and 5, the micro motor that the utlity model has axial air-gap comprises a pedestal 1, a coil groups 2 and a rotor 3.This coil groups 2 is arranged at this pedestal 1; This rotor 3 is rotatably in conjunction with this pedestal 1.
This pedestal 1 has a surface 11, and this surface 11 is provided with a central siphon 12, and this central siphon 12 forms an opening (not indicating) away from an end on this surface 11, and this open circumferential is an opening ora terminalis 121, and the preferable bearing 13 that is provided with in this central siphon 12.
This coil groups 2 is arranged at this pedestal 1, and for example, this coil groups 2 can directly be incorporated into the surface 11 of this pedestal 1, perhaps, also can not contact (not illustrating) with the surface 11 of this pedestal 1 in fact.In addition, in the preferred embodiment as shown in the figure, this coil groups 2 comprises several coils 21 and a substrate 22, and respectively this coil 21 can wire laying mode be located at the surface of this substrate 22, this substrate 22 is incorporated into the surface 11 of this pedestal 1, so that further reduce the axial height of this coil groups 2.
This rotor 3 has a medial surface 31, and this medial surface 31 is provided with a containing hole 32, and this containing hole 32 has a relative blind hole portion 321 and an opening portion 322 in the axial direction; This blind hole portion 321 is provided with an axle bed 33 and an annular groove 34, and this axle bed 33 is positioned at this 321 central authorities of blind hole portion, and this annular groove 34 is around the neighboring of this axle bed 33.In addition, this axle bed 33 is in conjunction with a central shaft 35, these central shaft 35 rotatable bearings 13 that are incorporated into this pedestal 1; Again, after this rotor 3 and this pedestal 1 mutually combined, this medial surface 31 and this opening portion 322 be towards the surface 11 of this pedestal 1, and the medial surface 31 of this rotor 3 is provided with a permanent magnet 36, has an axial air-gap G between this permanent magnet 36 and this coil groups 2.
More in detail, when this rotor 3 during rotatably in conjunction with the central siphon 12 of this pedestal 1, the central siphon 12 of this pedestal 1 stretches to the containing hole 32 of this rotor 3, to reduce the axial height of the utility model micro motor; In addition, this central shaft 35 axially on, this annular groove 34 has the datum level 341 in the face of this bearing 13, the datum level 341 of 121 these annular grooves 34 of further contraposition of the opening ora terminalis of this central siphon 12, make to have an interval S 1 between this opening ora terminalis 121 and this datum level 341, this interval S 1 is a safe distance; As shown in Figure 5, this safe distance preferred range be this central shaft 35 axially on, this axle bed 33 has the axle bed end face 331 in the face of this bearing 13, this bearing 13 also has the bearing face 131 in the face of this axle bed 33, have a gap S2 between this axle bed end face 331 and this bearing face 131, this gap S2 is preferable less than this interval S 1.Whereby, when these coil groups 2 these rotors 3 of driving begin to rotate or in the process of rotary work, even this rotor 3 produces the situation of slightly beat as shown in Figure 6, utilize formed interval S 1 between this opening ora terminalis 121 and this datum level 341, can guarantee effectively that still this rotor 3 is unlikely to collide the opening ora terminalis 121 of this central siphon 12.
By the architectural feature of preceding taking off, the main feature that the utlity model has the micro motor of axial air-gap is: the structural design that can hold for this central siphon 12 based on the containing hole 32 of this rotor 3, and have the effect that can reduce axial height equally, and still have enough bonded areas between this axle bed 33 and this central shaft 35; The more important thing is, though the opening ora terminalis 121 of this central siphon 12 quite approaches this axle bed 33, but the formed interval S 1 in datum level 341 backs by this this annular groove 34 of opening ora terminalis 121 contrapositions, still can make this rotor 3 in rotary course, be difficult for colliding the opening ora terminalis 121 of this central siphon 12, to avoid producing situations such as noise or damage.Generally speaking, the micro motor that the utlity model has axial air-gap can not increase axial height and not reduce under the condition of this axle bed 33 and these central shaft 35 bonded areas really, reaches the main purpose that makes this rotor 3 be difficult for the opening ora terminalis 121 of this central siphon 12 of collision in rotary course.
By the above-mentioned structural design notion that the utlity model has the micro motor of axial air-gap, the utility model also can further comprise at least one accessory structure feature or its combination as described below, and it is perfect that function of the present utility model is more leveled off to, wherein:
Please refer to shown in Fig. 4,5 and 6, make progress in the footpath of this rotor 3, this axle bed 33 has a maximum outside diameter D1, and the opening of this central siphon 12 has a maximum caliber D2; Wherein this maximum outside diameter D1 is less than this maximum caliber D2.Whereby, cooperate the structural design of above-mentioned this annular groove 34,, can guarantee that still this axle bed 33 can not touch the opening ora terminalis 121 of this central siphon 12 even this axle bed 33 more is close to this central siphon 12.
Please refer to shown in Fig. 7 and 8 the opening ora terminalis 121 preferable formation one buckle ends 122 of this central siphon 12.When actual assembled, when this bearing 13 is placed in central siphon 12 inside of this pedestal 1, can utilize anchor clamps (not illustrating) further to compress this opening ora terminalis 121 to form this buckle end 122, and then utilize this buckle end 122 effective these bearings 13 of butt, these bearing 13 preferred positioning to be provided and to prevent deviating from effect; In addition, as shown in Figure 8, this buckle end 122 has an ora terminalis 122a, the position of these buckle end 122 same these annular grooves 34 of contraposition, and the preferable direction diagonally extending towards this bearing 13 of the ora terminalis 122a of this buckle end 122 dwindle the relative distance between this ora terminalis 122a and this axle bed 33, so, have under the condition of positioning function at this buckle end 122, hold concurrently and to avoid entering this central siphon 12, to reach many effects such as dustproof or protection against the tide as foreign matters such as dusts.
Please refer to shown in Figure 9, between this opening ora terminalis 121 and this annular groove 34, still have under the condition of an interval S 1, the opening ora terminalis 121 of this central siphon 12 has an extension 121a, and this central shaft 35 axially on, this axle bed 33 has this axle bed end face 331 in the face of this bearing 13, this extension 121a is preferable towards these annular groove 34 extensions and above this axle bed end face 331, makes this extension 121a can be positioned at this annular groove 34; Whereby, can utilize this extension 121a further to prevent to enter this central siphon 12, to reach better dustproof or moistureproof effect as foreign matters such as dusts.
The micro motor that the utlity model has axial air-gap can be applicable to cooling fan structure in addition, as blast-type cooling fan or axial-flow type radiator fan.Please refer to shown in Figure 10ly, disclose the utility model and be applied to axial-flow type radiator fan; Wherein this pedestal 1 can have the fan frame structure of an air intake vent 42 and an air outlet 43 directly with the external framework 4 of several connectors 41 (as rib or stator blade) with formation; In addition, this rotor 3 can radially extend several blades 37.Whereby, this radiator fan can be installed in various electronic installation or electronic instrument, and when these rotor 3 rotary works, this blade 37 can be introduced extraneous air-flow from this air intake vent 42, and this air-flow exported to a heat source position from this air outlet 43, to reach predetermined thermolysis.
By on learn that the utility model is by formed axial air-gap G between this coil groups 2 and this permanent magnet 36, and the central siphon 12 of this pedestal 1 can stretch to the structural designs such as containing hole 32 of this rotor 3, with effective reduction volume and reduce axial height.Moreover, in the basic structure of above-mentioned micro motor, the utility model further utilizes the annular groove 34 of this rotor 3 of opening ora terminalis 121 contrapositions of this central siphon 12, make have between this opening ora terminalis 121 and this annular groove 34 interval S 1 with form safe distance architectural feature, and then provide a kind of and can guarantee that this rotor 3 is in rotary course, the micro motor that is difficult for this central siphon 12 of collision is conveniently to be applied to various microminiaturized electronic product.
Claims (10)
1. micro motor with axial air-gap is characterized in that comprising:
A pedestal has a surface, and this surface is provided with a central siphon, and this central siphon one end forms an opening, and this open circumferential is an opening ora terminalis, and a bearing is set in this central siphon;
A coil groups is arranged at this pedestal; And
A rotor has a medial surface, and this medial surface is provided with a containing hole and a permanent magnet, and this containing hole has relative a blind hole portion and an opening portion in the axial direction; This blind hole portion is provided with an axle bed and an annular groove, and this axle bed is in conjunction with a central shaft, and this annular groove is around the neighboring of this axle bed;
Wherein, this central shaft is in conjunction with the bearing of this pedestal, this central shaft axially on, this annular groove has a datum level in the face of this bearing, have an axial air-gap between this permanent magnet and this coil groups, the medial surface of this rotor and opening portion are towards the surface of this pedestal, and the central siphon of this pedestal is contained in the containing hole of this rotor, the datum level of this annular groove of opening ora terminalis contraposition of this central siphon has a spacing between this opening ora terminalis and this datum level.
2. according to the described micro motor of claim 1 with axial air-gap, it is characterized in that, this central shaft axially on, this axle bed has an axle bed end face in the face of this bearing, this bearing also has a bearing face in the face of this axle bed, have a gap between this axle bed end face and this bearing face, this gap is less than formed this spacing between this opening ora terminalis and this datum level.
3. according to the described micro motor with axial air-gap of claim 1, it is characterized in that this axle bed has a maximum outside diameter, the opening of this central siphon has a maximum caliber, and this maximum outside diameter is less than this maximum caliber.
4. according to claim 1,2 or 3 described micro motors, it is characterized in that the opening ora terminalis of this central siphon forms a buckle end, this this bearing of buckle end butt with axial air-gap.
5. according to the described micro motor with axial air-gap of claim 4, it is characterized in that this buckle end has an ora terminalis, the ora terminalis of this buckle end is towards the direction diagonally extending of this bearing.
6. according to claim 1 or 3 described micro motors with axial air-gap, it is characterized in that, this central shaft axially on, this axle bed has an axle bed end face in the face of this bearing, the opening ora terminalis of this central siphon has an extension, and this extension is towards this annular groove extension and surpass this axle bed end face.
7. according to the described micro motor with axial air-gap of claim 2, it is characterized in that the opening ora terminalis of this central siphon has an extension, this extension is towards this annular groove extension and surpass this axle bed end face.
8. according to claim 1,2 or 3 described micro motors with axial air-gap, it is characterized in that this coil groups comprises several coils and a substrate, respectively this coil is located at the surface of this substrate with wire laying mode, and this substrate is incorporated into the surface of this pedestal.
9. according to the described micro motor with axial air-gap of claim 4, it is characterized in that this coil groups comprises several coils and a substrate, respectively this coil is located at the surface of this substrate with wire laying mode, and this substrate is incorporated into the surface of this pedestal.
10. according to the described micro motor with axial air-gap of claim 6, it is characterized in that this coil groups comprises several coils and a substrate, respectively this coil is located at the surface of this substrate with wire laying mode, and this substrate is incorporated into the surface of this pedestal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201105065U CN201639401U (en) | 2010-02-09 | 2010-02-09 | Micro-motor with axial air gap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201105065U CN201639401U (en) | 2010-02-09 | 2010-02-09 | Micro-motor with axial air gap |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201639401U true CN201639401U (en) | 2010-11-17 |
Family
ID=43083908
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201105065U Expired - Lifetime CN201639401U (en) | 2010-02-09 | 2010-02-09 | Micro-motor with axial air gap |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201639401U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110022026A (en) * | 2018-01-10 | 2019-07-16 | 建准电机工业股份有限公司 | Micro motor and its fan |
| TWI667867B (en) * | 2018-03-07 | 2019-08-01 | 台達電子工業股份有限公司 | Mechanical device and bearingless motor thereof |
-
2010
- 2010-02-09 CN CN2010201105065U patent/CN201639401U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110022026A (en) * | 2018-01-10 | 2019-07-16 | 建准电机工业股份有限公司 | Micro motor and its fan |
| TWI667867B (en) * | 2018-03-07 | 2019-08-01 | 台達電子工業股份有限公司 | Mechanical device and bearingless motor thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20101117 |
|
| CX01 | Expiry of patent term |