CN100353650C - Brushless DC motor - Google Patents
Brushless DC motor Download PDFInfo
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- CN100353650C CN100353650C CNB031286720A CN03128672A CN100353650C CN 100353650 C CN100353650 C CN 100353650C CN B031286720 A CNB031286720 A CN B031286720A CN 03128672 A CN03128672 A CN 03128672A CN 100353650 C CN100353650 C CN 100353650C
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- magnetic pole
- magnetic
- seat
- pole seat
- conductive tube
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Abstract
The present invention relates to a brushless DC motor which has the advantages of simple structure, thin whole thickness, small members, convenient assembly, stable combination and low cost. The present invention comprises a magnetic pole seat, a magnetic pole sheet, a coil group, a rotor and a circuit board, wherein the rotor is provided with an axial rod and a permanent magnet; the circuit board is connected with a sensing element; the magnetic pole seat and the magnetic pole sheet are respectively formed by that single magnetic conductive sheets are punched and folded, and a plurality of magnetic pole surfaces and magnetism guiding pipes are respectively and integrally punched and formed; the magnetism guiding pipes are respectively formed at the magnetic pole seat and the central position of the magnetic pole sheet; the magnetic pole surfaces are respectively ranged around the magnetic pole seat and the magnetism guiding pipes of the magnetic pole sheet, the magnetic pole seat and the magnetism guiding pipe in the center of the magnetic pole sheet are mutually inserted and sheathed to form an axial pipe; the magnetic pole seat and the magnetic pole surface of the magnetic pole sheet are mutually arrayed in a staggered mode and are adjacent to the coil group; the axial pipe contains at least one bearing used for the penetration and combination of a rotor axis; the coil group and the circuit board are assembled on the magnetic pole seat.
Description
Technical field
The invention belongs to motor, particularly a kind of brushless DC motor.
Background technology
As shown in Figure 9, the axial coiling brushless DC motor of commonly using comprises upper and lower pole piece 10 coil groups 20, rotor 30, circuit board 40, metal central siphon 50 and pedestal 60.
Upper and lower pole piece 10 is coil holder 21 both sides that are mounted on coil groups 20, to form stator pack.
Stator pack and circuit board 40 utilize metal central siphon 30 simultaneously and axially are stacked on the pedestal 60; Rotor 30 can be arranged in metal central siphon 30, and drives rotor 30 rotations by the change in polarity of several magnetic pole strengths 101 of upper and lower pole piece 10.
Though, the structure of brushless DC motor is widely used in various electronic installations at present, but the stator component of brushless DC motor comprises coil groups 20, coil holder 21, circuit board 40, metal central siphon 50 and upper and lower pole piece 10, the number of components is too much, and, each stator component system is combined on the pedestal 60 with axial stack manner, therefore, causes brush-less Dc motor integral thickness and volume to be difficult to further effectively reduction.
Summary of the invention
The purpose of this invention is to provide the brushless DC motor that a kind of simple in structure, integral thickness is thin, member is few, assembling is convenient, combination is stable, cost is low.
The present invention includes magnetic pole seat, pole piece, coil groups, rotor and circuit board; Rotor is provided with axostylus axostyle and permanent magnet; Circuit board is provided with sensing element; Magnetic pole seat and pole piece system are bent to form by single magnetic conduction sheet punching press respectively, and integrated punching forms several magnetic pole strengths and magnetic conductive tube respectively; Each magnetic conductive tube is formed at the middle position of magnetic pole seat and pole piece respectively; The number magnetic pole strengths are respectively around being arranged in around magnetic pole seat and the pole piece magnetic conductive tube; The magnetic conductive tube of magnetic pole seat and pole piece middle position is chimeric sheathed formation central siphon mutually; And interlaced arrangement of the magnetic pole strength that makes magnetic pole seat and pole piece and adjacent coil group; Be installed with at least one bearing that wears combination for rotor shaft in the central siphon; The magnetic pole seat is provided with several for it is fixedly arranged on the location division in precalculated position; Coil groups and circuit board system are mounted on the magnetic pole seat.
Wherein:
The magnetic pole strength system of magnetic pole seat and pole piece is respectively equidistantly around around the magnetic conductive tube that is arranged in magnetic pole seat and pole piece.
Each magnetic pole strength top on magnetic pole seat and the pole piece is formed with breach.
The chimeric magnetic pole seat magnetic conductive tube that is sheathed on of pole piece magnetic conductive tube; And between magnetic pole seat top and bearing bottom, be folded with clasp so as to spacing rotor shaft.
Be provided with the top bracing member of radially shoring magnetic conductive tube in the magnetic pole seat magnetic conductive tube.
Top bracing member upwards forms ring flange; And between top bracing member ring flange top and bearing bottom, be folded with clasp so as to spacing rotor shaft.
The magnetic pole pipe of pole piece is for upwards being bent to form than weak point and towards rotor; The chimeric magnetic pole seat magnetic conductive tube outer wall that is sheathed on of the magnetic pole pipe of pole piece is to dwindle magnetic pole seat and pole piece magnetic conductive tube top to the gap between the rotor inner wall.
The circuit board periphery is provided with the extension that is provided with for sensing element, so that sensing element is pressed close to the permanent magnet of rotor.
Circuit board directly connects sensing element with lead; The punching press of magnetic pole seat forms for the outward extending conduit of lead, so that sensing element is pressed close to the permanent magnet of rotor.
Sensing element is arranged in the short slot of the corresponding magnetic pole strength punching press formation of magnetic pole seat.
Sensing element is arranged in the slotted eye that punching press forms on the magnetic pole seat.
Circuit board is incorporated into magnetic pole seat lower surface.
The location division is to be convexly set in the lug that magnetic pole seat outer peripheral edges are provided with the hole.
The location division is several location holes that are arranged at magnetic pole seat outer rim.
Owing to the present invention includes magnetic pole seat, pole piece, coil groups, rotor and circuit board; Rotor is provided with axostylus axostyle and permanent magnet; Circuit board is provided with sensing element; Magnetic pole seat and pole piece system are bent to form by single magnetic conduction sheet punching press respectively, and integrated punching forms several magnetic pole strengths and magnetic conductive tube respectively; Each magnetic conductive tube is formed at the middle position of magnetic pole seat and pole piece respectively; The number magnetic pole strengths are respectively around being arranged in around magnetic pole seat and the pole piece magnetic conductive tube; The magnetic conductive tube of magnetic pole seat and pole piece middle position is chimeric sheathed formation central siphon mutually; And interlaced arrangement of the magnetic pole strength that makes magnetic pole seat and pole piece and adjacent coil group; Be installed with at least one bearing that wears combination for rotor shaft in the central siphon; Coil groups and circuit board system are mounted on the magnetic pole seat.Magnetic pole seat and pole piece utilize the direct punching press of single magnetic conduction sheet to form respectively, and magnetic pole seat and pole piece all are respectively equipped with several magnetic pole strengths and magnetic conductive tube, and make circuit board, coil groups and magnetic pole strength also are arranged on the magnetic pole seat in preferable arranged radially mode as far as possible, and pole piece is also directly chimeric sheathed to be incorporated on the magnetic pole seat with the magnetic conductive tube of magnetic conductive tube and magnetic pole seat, so that form firm combination between magnetic pole seat and pole piece therefore, the present invention has really can reduce align member quantity, simplify overall structure, reduce manufacturing cost relatively, effectively axial integral thickness of reduction and raising stator pack are in conjunction with the effect of convenience and intensity.Not only simple in structure, integral thickness approaches, member is few, and assembling is convenient, combination is stable, cost is low, thereby reaches purpose of the present invention.
Description of drawings
Fig. 1, be the embodiment of the invention one decomposition texture schematic isometric.
Fig. 2, be the embodiment of the invention one structural representation cutaway view.
Fig. 3, be the embodiment of the invention two decomposition texture schematic isometric.
Fig. 4, be the embodiment of the invention two structural representation cutaway views.
Fig. 5, be the embodiment of the invention three decomposition texture schematic isometric.
Fig. 6, be the embodiment of the invention three structural representation cutaway views.
Fig. 7, be the embodiment of the invention four decomposition texture schematic isometric.
Fig. 8, be the embodiment of the invention four structural representation cutaway views.
Fig. 9, axial coiling brushless DC motor decomposition texture schematic isometric for commonly using.
Embodiment
Embodiment one
As shown in Figure 1 and Figure 2, the present invention includes magnetic pole seat 10a, pole piece 10a ', coil groups 20a, rotor 30a and circuit board 40a.
Moreover as shown in Figure 1 and Figure 2, breach 111a, the 111a ' of suitable shape can select to form in each the magnetic pole strength 11a on magnetic pole seat 10a and the pole piece 10a ', 11a ' top system.When starting power supply, can produce uneven alternating magnetic field by breach 111a, 111a ', rotate to impel rotor 30a, thereby the function that the present invention is had be easy to start.
Embodiment two
As shown in Figure 3, Figure 4, the present invention includes magnetic pole seat 10b, pole piece 10b ', coil groups 20b, rotor 30b and circuit board 40b.
Embodiment three
As Fig. 5, shown in Figure 6, the present invention includes magnetic pole seat 10c, pole piece 10c ', coil groups 20c, rotor 30c and circuit board 40c.
The magnetic pole strength 11c of magnetic pole seat 10c system is equally spacedly around being arranged in around the magnetic pole seat 10c magnetic conductive tube 12c; The magnetic pole strength 11c ' of pole piece 10c ' is equally spacedly around being arranged in corresponding to pole piece 10c ' magnetic conductive tube 12c ' on every side, and magnetic pole strength 11c, the 11c ' of magnetic pole seat 10c and pole piece 10c ' can interlaced arrangement and adjacent coil group 20c; Magnetic conductive tube 12c, 12c ' are that the middle position punching press by magnetic pole seat 10c and pole piece 10c ' forms, upwards be bent to form the short and chimeric magnetic conductive tube 12c ' that is sheathed on magnetic pole seat 10c magnetic conductive tube 12c outer wall of length by pole piece 10c ', so that form firm combination between magnetic pole seat 10c and pole piece 10c ', the while magnetic conductive tube 12c of magnetic pole seat 10c is installed with at least one bearing 121c, is positioned at the clasp 311c and the top bracing member 122c of bearing 121c bottom; Bearing 121c can be self-lubricating bearing or ball bearing, its not only can in conjunction with and the axostylus axostyle 31c of location rotor 30c, and also can radially shore to increase by two magnetic conductive tube 12c, the 12c ' bond strength after chimeric.Top bracing member 122c upwards forms ring flange, so as to clasp 311c being located between top bracing member 122c flange top and the bearing 121c bottom, with the axostylus axostyle 31c of spacing rotor 30c.Location division 13c is convexly set in the lug that magnetic pole seat 10c outer peripheral edges are provided with the hole, and it is magnetic pole seat 10c to be selected to be fixedly arranged on the housing of heat emission fan or directly to be installed on electronic installation by several setting elements 131c, in notebook computer.Circuit board 40c is arranged at magnetic pole seat 10c upper surface, and the sensing element 42c that order is arranged on its extension 41c is located in the magnetic pole seat 10c slotted eye 14c, so that make sensing element 42c between on-stream period, press close to the permanent magnet 32c of rotor 30c, with the change in polarity of detecting permanent magnet 32c.
Moreover as Fig. 5, shown in Figure 6, breach 111c, the 111c ' of suitable shape can select to form in each the magnetic pole strength 11c on magnetic pole seat 10c and the pole piece 10c ', 11c ' top system.When starting power supply, can produce uneven alternating magnetic field by breach 111c, 111c ', rotate to impel rotor 30c, thereby the function that the present invention is had be easy to start.
Embodiment four
As Fig. 7, shown in Figure 8, the present invention includes magnetic pole seat 10d, pole piece 10d ', coil groups 20d, rotor 30d and circuit board 40d.
Magnetic pole seat 10d and the preferable system of pole piece 10d ' are formed by the folding that bends in the single magnetic conduction sheet respectively.
Magnetic pole seat 10d is the pedestal of stator components such as upper surface carrying coil groups 20d and combined circuit plate 40d, and magnetic pole seat 10d preferable be that integrated punching forms several magnetic pole strength 11d that forms corresponding short slot, magnetic conductive tube 12d, several location divisions 13d and the outward extending conduit 15d of power circuit board 40d lead 43d.
Pole piece 10d ' also integrated punching forms several magnetic pole strengths 11d ' and magnetic conductive tube 12d '.
Magnetic pole strength 11d, the 11d ' of magnetic pole seat 10d and pole piece 10d ' is respectively equally spacedly around being arranged in magnetic pole seat 10d and pole piece 10d ' magnetic conductive tube 12d, 12d ' on every side, and magnetic pole strength 11d, the 11d ' of magnetic pole seat 10d and pole piece 10d ' can interlaced arrangement and adjacent coil group 20d; Magnetic conductive tube 12d, 12d ' are that the middle position punching press by magnetic pole seat 10d and pole piece 10d ' forms, magnetic conductive tube 12d, 12d ' by magnetic pole seat 10d and pole piece 10d ' middle position are chimeric sheathed mutually, so that form firm combination between magnetic pole seat 10d and pole piece 10d ', the chimeric formation of magnetic conductive tube 12d, 12d ' of magnetic pole seat 10d and pole piece 10d ' simultaneously is installed with the central siphon of at least one bearing 121d and top bracing member 122d; Bearing 121d can be self-lubricating bearing or ball bearing, its not only can in conjunction with and the axostylus axostyle 31d of location rotor 30d, and also can radially shore to increase by two magnetic conductive tube 12d, the 12d ' bond strength after chimeric.Location division 13d is convexly set in the lug that magnetic pole seat 10d outer peripheral edges are provided with the hole, and it is magnetic pole seat 10d to be selected to be fixedly arranged on the housing of heat emission fan or directly to be installed on electronic installation by several setting elements 131d, in notebook computer.Circuit board 40d is arranged at magnetic pole seat 10d upper surface, and sensing element 43d can be arranged in the punching press short slot corresponding with magnetic pole strength 13d, thereby make sensing element 43d between on-stream period, press close to the permanent magnet 32d of rotor 30d, with the change in polarity of detecting permanent magnet 32d.So, circuit board 40d need not be provided with extension and dwindle area, therefore, can further avoid circuit board 40d and coil groups 20d to form axially piles up, thereby can reduce integral thickness of the present invention, or increase the number of turns of coil groups 20d relatively, to increase the excitatory intensity of alternation of stator pack.
Moreover as Fig. 7, shown in Figure 8, breach 111d, the 111d ' of suitable shape can select to form in each the magnetic pole strength 11d on magnetic pole seat 10d and the pole piece 10d ', 11d ' top system.When starting power supply, can produce uneven alternating magnetic field by breach 111d, 111d ', rotate to impel rotor 30d, thereby the function that the present invention is had be easy to start.
As mentioned above, because the present invention system utilizes the direct punching press of single magnetic conduction sheet to form magnetic pole seat 10a respectively, 10b, 10c, 10d and pole piece 10a ', 10b ', 10c ', 10d ', and magnetic pole seat 10a, 10b, 10c, 10d and pole piece 10a ', 10b ', 10c ', 10d ' all is respectively equipped with several magnetic pole strength 11a, 11b, 11c, 11d, 11a ', 11b ', 11c ', 11d ' and magnetic conductive tube 12a, 12b, 12c, 12d, 12a ', 12b ', 12c ', 12d ', and make circuit board 40a, 40b, 40c, 40d, coil groups 20a, 20b, 20c, 20d and magnetic pole strength 11a, 11b, 11c, 11d, 11a ', 11b ', 11c ', 11d ' also is arranged at magnetic pole seat 10a in preferable arranged radially mode as far as possible, 10b, 10c, on the 10d, and pole piece 10a ', 10b ', 10c ', 10d ' is also directly with magnetic conductive tube 12a ', 12b ', 12c ', 12d ' and magnetic pole seat 10a, 10b, 10c, the magnetic conductive tube 12a of 10d, 12b, 12c, 12d is chimeric sheathed to be incorporated into magnetic pole seat 10a, 10b, 10c, on the 10d, therefore, the present invention has really and can reduce align member quantity, simplify overall structure, reduce manufacturing cost relatively, effectively axial integral thickness of reduction and raising stator pack are in conjunction with the effect of convenience and intensity.
Claims (14)
1, a kind of brushless DC motor, it comprises coil groups, rotor and circuit board; Rotor is provided with axostylus axostyle and permanent magnet; Circuit board is provided with sensing element; It is characterized in that described coil groups, rotor and circuit board group be located on the magnetic pole seat and pole piece that combines; Magnetic pole seat and pole piece are bent to form by single magnetic conduction sheet punching press respectively, and integrated punching forms several magnetic pole strengths and magnetic conductive tube respectively; Each magnetic conductive tube is formed at the middle position of magnetic pole seat and pole piece respectively; Described several magnetic pole strengths are respectively around being arranged in around magnetic pole seat and the pole piece magnetic conductive tube; The magnetic conductive tube of magnetic pole seat and pole piece middle position is chimeric sheathed formation central siphon mutually; And interlaced arrangement of the magnetic pole strength that makes magnetic pole seat and pole piece and adjacent coil group; Be installed with at least one bearing that wears combination for rotor shaft in the central siphon; Described magnetic pole seat is provided with several for it is fixedly arranged on the location division in precalculated position.
2, brushless DC motor according to claim 1, the magnetic pole strength system that it is characterized in that described magnetic pole seat and pole piece is respectively equidistantly around around the magnetic conductive tube that is arranged in magnetic pole seat and pole piece.
3, brushless DC motor according to claim 1 is characterized in that each the magnetic pole strength top on described magnetic pole seat and the pole piece is formed with breach.
4, brushless DC motor according to claim 1 is characterized in that the chimeric magnetic pole seat magnetic conductive tube that is sheathed on of described pole piece magnetic conductive tube; And between magnetic pole seat top and bearing bottom, be folded with clasp so as to spacing rotor shaft.
5, brushless DC motor according to claim 1 is characterized in that being provided with the top bracing member of radially shoring magnetic conductive tube in the described magnetic pole seat magnetic conductive tube.
6, brushless DC motor according to claim 5 is characterized in that described top bracing member upwards forms ring flange; And between top bracing member ring flange top and bearing bottom, be folded with clasp so as to spacing rotor shaft.
7, brushless DC motor according to claim 1, the magnetic pole pipe that it is characterized in that described pole piece is for upwards being bent to form than weak point and towards rotor; The chimeric magnetic pole seat magnetic conductive tube outer wall that is sheathed on of the magnetic pole pipe of pole piece is to dwindle magnetic pole seat and pole piece magnetic conductive tube top to the gap between the rotor inner wall.
8, brushless DC motor according to claim 1 is characterized in that described circuit board periphery is provided with the extension that is provided with for sensing element, so that sensing element is pressed close to the permanent magnet of rotor.
9, brushless DC motor according to claim 1 is characterized in that described circuit board directly connects sensing element with lead; The punching press of magnetic pole seat forms for the outward extending conduit of lead, so that sensing element is pressed close to the permanent magnet of rotor.
10, according to Claim 8 or 9 described brushless DC motors, it is characterized in that described sensing element is arranged in the short slot that the corresponding magnetic pole strength punching press of magnetic pole seat forms.
11, according to Claim 8 or 9 described brushless DC motors, it is characterized in that described sensing element is arranged in the slotted eye that punching press forms on the magnetic pole seat.
12, brushless DC motor according to claim 1 is characterized in that described circuit board is incorporated into magnetic pole seat lower surface.
13, brushless DC motor according to claim 1 is characterized in that described location division is to be convexly set in the lug that magnetic pole seat outer peripheral edges are provided with the hole.
14, brushless DC motor according to claim 1 is characterized in that described location division is several location holes that are arranged at magnetic pole seat outer rim.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031286720A CN100353650C (en) | 2003-04-29 | 2003-04-29 | Brushless DC motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031286720A CN100353650C (en) | 2003-04-29 | 2003-04-29 | Brushless DC motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1543043A CN1543043A (en) | 2004-11-03 |
| CN100353650C true CN100353650C (en) | 2007-12-05 |
Family
ID=34322209
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031286720A Expired - Fee Related CN100353650C (en) | 2003-04-29 | 2003-04-29 | Brushless DC motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100353650C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101847911B (en) * | 2009-03-25 | 2013-08-28 | 鸿富锦精密工业（深圳）有限公司 | Motor driver and power supply wiring device |
| CN103779981B (en) * | 2014-01-24 | 2015-11-18 | 深圳市正德精密技术有限公司 | A kind of brush DC electrical micro-machine |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2109658U (en) * | 1991-11-02 | 1992-07-08 | 洪银树 | Improved structure of brushless dc motor stator |
| CN2358256Y (en) * | 1998-11-13 | 2000-01-12 | 八明实业有限公司 | Double-rotor brushless dc fan |
| US6358357B1 (en) * | 1995-07-27 | 2002-03-19 | Morton International, Inc. | Packaging adhesive mixtures for controlled gas barrier properties |
-
2003
- 2003-04-29 CN CNB031286720A patent/CN100353650C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2109658U (en) * | 1991-11-02 | 1992-07-08 | 洪银树 | Improved structure of brushless dc motor stator |
| US6358357B1 (en) * | 1995-07-27 | 2002-03-19 | Morton International, Inc. | Packaging adhesive mixtures for controlled gas barrier properties |
| CN2358256Y (en) * | 1998-11-13 | 2000-01-12 | 八明实业有限公司 | Double-rotor brushless dc fan |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1543043A (en) | 2004-11-03 |
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| C06 | Publication | ||
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071205 Termination date: 20120429 |