CN1315242C - Rotor core for brushless direct-current machine - Google Patents
Rotor core for brushless direct-current machine Download PDFInfo
- Publication number
- CN1315242C CN1315242C CNB021567530A CN02156753A CN1315242C CN 1315242 C CN1315242 C CN 1315242C CN B021567530 A CNB021567530 A CN B021567530A CN 02156753 A CN02156753 A CN 02156753A CN 1315242 C CN1315242 C CN 1315242C
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- rotor core
- magnet
- rivet hole
- motor
- magnet slot
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- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The present invention discloses a rotor core for a brushless DC motor, which comprises a rotor core 10, a plurality of magnets 21, 22 and a rotary shaft 31, wherein the rotor core 10 is formed by laminating a plurality of disc-shaped steel plates 11 in an insulating mode; the magnets 21 are adjacently connected to the periphery of the rotor core 10 and are contained and combined at equal intervals in the circumferential direction; the rotary shaft 31 and the shaft center of the rotor core 10 are connected into a whole body; a shaft hole 12 for the insertion of the rotary shaft 31 is formed at the center of the rotor core 10 in a penetrating mode. Magnet grooves 14, 15 are used for containing the magnets 21, 22 and penetrate through the rotor core 10; rivet holes 16 are distributed on the inner sides of magnet grooves 14, 15 in the radial direction of the magnet grooves 14, 15 and penetrate in an axial direction of the rotary shaft 31. the cut parts 18, 19 which are gradually enlarged to the center are arranged on the adjacent edge parts of the magnet grooves 14, 15 and the rivet holes 16. according to the structure, the rotor core for a brushless DC motor, which enables magnets to more easily to be inserted in, is provided.
Description
Technical field
The present invention relates to the rotor core in a kind of electricity field motor, particularly relate to a kind of rotor core that makes the brshless DC motor that the magnet installation procedure is more prone to.
Background technology
In general, brushless direct-current (Blushless DC) motor comprises: form magnetic field, with transmission of torque to outside rotor, according to produce the amateurish coil of torque with the interaction in magnetic field, when adjusting amateurish coil, form magnetic circuit stator core, can find the position sensible element of rotor accurate location.
Shown in Figure 1 is the perspective diagram of existing brushless DC motor rotor.Shown in Figure 2 is the sectional view of the rotor among Fig. 1.And the rotor core among the Fig. 2 of being shown in Figure 3 look closely schematic diagram.Shown in above accompanying drawing, rotor comprises: steel plate 11 insulation by several disc-shapes laminates the rotor core 10 that forms, the periphery that abuts against rotor core 10, along its circumferencial direction with several magnets 21 of uniformly-spaced accommodating combination and the rotating shaft 31 that fuses with the axle center of rotor core 10.
Connect on each steel plate 11 of rotor core 10 and be formed with: central authorities can insert the axis hole 12 of rotating shaft 31, the magnet slot 14 that magnet 21 can be accommodated in the edge.And be formed with between axis hole 12 and the magnet slot 14: in the steel plate 11 that rivet 23 perforation insertion mutually insulateds can be laminated, the rivet hole 16 that steel plate 11 is combined into one.Axis direction along rotating shaft 31 is combined with respectively in the both sides of steel plate 11: prevent that magnet from moving and the anti-detachment parts 25 that break away from and anti-moving member 27 and be combined with balanced stone roller 29 in its a side along the axis direction of rotating shaft 31.
But, for the rotor core 10 of structure existing brshless DC motor as above, when magnet bore 14 formed 16 formation of back rivet hole, the zone between magnet slot 14 and the rivet hole 16 can be along the outwards outstanding distortion of radial direction, the width that causes magnet slot 14 thus diminishes, and magnet 21 inserts difficulty.
Summary of the invention
The technical problem to be solved in the present invention is, overcomes the above-mentioned defective that existing brushless DC motor rotor exists, and the rotor core of the brshless DC motor that a kind of insertion that makes magnet is more prone to is provided.
The present invention provides following technical scheme for solving the problems of the technologies described above.
Rotor core according to brshless DC motor of the present invention, it comprises that the steel plate insulation by several disc-shapes laminates the rotor core that forms, abut against the periphery of rotor core, along its circumferencial direction with several magnets of uniformly-spaced accommodating combination and the rotating shaft that fuses with the axle center of rotor core, central authorities at rotor core connect the axis hole that is formed with the insertion rotating shaft, accommodate magnet the perforation rotor core magnet slot and be distributed in the magnet slot inboard along its radial direction, and the rivet hole that connects along the axis direction of rotating shaft, wherein, form the extension of this magnet slot in the mode that cuts to the increasing amplitude of central side at the position, edge of described magnet slot and described rivet hole adjacency.
The rotor core of aforesaid brshless DC motor, the width of wherein said extension when forming described rivet hole cause that the width of deflection is big.
The rotor core of aforesaid brshless DC motor, the arcuation length of wherein said extension is bigger than the diameter of above-mentioned rivet hole.
The present invention compared with prior art has tangible advantage and good effect.By above technical scheme as can be known, the rotor core of brshless DC motor of the present invention, comprise that the steel plate insulation by several disc-shapes laminates the rotor core that forms, abut against the periphery of rotor core, along its circumferencial direction with several magnets of uniformly-spaced accommodating combination and the rotating shaft that fuses with the axle center of rotor core, central authorities at rotor core connect the axis hole that is formed with the insertion rotating shaft, accommodate magnet the perforation rotor core magnet slot and be distributed in the magnet slot inboard along its radial direction, and the rivet hole that connects along the axis direction of rotating shaft, and, have to central side extension more and more significantly at the position, edge of magnet slot and described rivet hole adjacency.According to this structure, can provide the rotor core that makes magnet be easy to the brshless DC motor that inserts more.
The rotor core of brshless DC motor of the present invention, because of its position, edge in the adjacency magnet slot, cut with the width that increases compared with the neighboring area and to have formed extension, prevented the reduced width phenomenon of the magnet slot that distortion that rivet hole produces when forming causes, make easier the finishing of insertion operation of magnet.
In sum, the invention provides the rotor core of the brshless DC motor that a kind of insertion that makes magnet is more prone to, it is in limited field, technical development space, no matter structurally or bigger improvement all arranged on the function, and have large improvement technically, and produced handy and practical effect, and have the effect of enhancement really, thereby being suitable for practicality more, really is a new and innovative, progressive, practical new invention.
Concrete structure of the present invention is provided in detail by following examples and accompanying drawing thereof.
Description of drawings
Fig. 1 is the perspective diagram of existing brushless DC motor rotor core.
Fig. 2 is the sectional view of the rotor core among Fig. 1.
Fig. 3 be among Fig. 1 rotor core look closely schematic diagram.
Fig. 4 is the user mode schematic diagram according to a preferred embodiment of brushless DC motor rotor core of the present invention.
Fig. 5 is the end-view of the rotor core among Fig. 4.
Fig. 6 is the enlarged drawing of the major part among Fig. 5.
Fig. 7 is the user mode schematic diagram according to another preferred embodiment of brushless DC motor rotor core of the present invention.
Fig. 8 be among Fig. 7 rotor core look closely enlarged drawing.
Fig. 9 is the enlarged drawing of the major part among Fig. 8.
The label declaration of main parts size among the figure:
10: rotor 11: steel plate
12: axis hole 14: magnet slot
15: magnet slot 16: rivet hole
18: extension 19: extension
21: magnet 22: magnet
23: rivet 25: coming-off preventing member
27: anti-moving member 29: balanced stone roller
31: rotating shaft
Embodiment
Below in conjunction with accompanying drawing and preferred embodiment, to its concrete structure, feature and the effect thereof that foundation the present invention proposes, describe in detail as after.
See also Fig. 4 to Fig. 6, the preferred embodiment of the rotor core of brshless DC motor of the present invention comprises: steel plate 11 insulation by several disc-shapes laminate the rotor core 10 that forms, the periphery that abuts against rotor core 10 is inserted several magnets 21 of combination, fuse with the axle center of rotor core 10, and rotatable rotary axle 31, the axis hole 12 that central part connects in order to insert rotating shaft 31, the magnet slot 14 that connects for magnet 21 is inserted outer peripheral face, be formed at the rivet hole 16 between axis hole 12 and the magnet slot 14 for rivet 23 is inserted and cut the extension 18 of formation at the position, edge of described magnet slot 14 and described rivet hole 16 adjacency.
At this, the wide cut of above-mentioned each extension 18 cans be compared to most when forming 16 formation of back rivet hole along with magnet slot 14, zone between each magnet slot 14 and the rivet hole 16, preferably constitutes with its length circular shape bigger than the diameter of rivet hole 16 big the time along the deflection of the outwards outstanding distortion of radial direction.
By above structure, but with 11 insulation of each steel plate laminate the cambium layer body, in the coming-off preventing member 25 of a certain side setting open magnet groove 14 of steel plate 11, the inside that magnet 21 is inserted each magnet slot 14 again.At this moment, the deflection that the formation wide cut of each extension 18 produces when forming than rivet hole 16 is big, makes each magnet 21 can be easier to insert in the corresponding magnet slot 14.When magnet 21 in conjunction with operation intact after, at opposite side anti-moving member 27, coming-off preventing member 25 and the equilibrium stone roller 29 that prevents magnet 21 and move is set respectively, and in each rivet hole 16 that connects mutually, inserts rivet 23 31 on formation end rotating shafts and insert combination in the axis hole 12 that connects mutually.
Seeing also Fig. 7 to Fig. 9, is another preferred embodiment of rotor core of brshless DC motor of the present invention, and it comprises: steel plate 11 insulation by several disc-shapes laminate the rotor core 10 that forms, the outer peripheral face that abuts against rotor core 10.Mutually several circular-arc magnets 21 of uniformly-spaced arranging, fuse with the axle center of rotor core 10.And rotatable rotary axle 31, has the axis hole 12 that central part connects, zone with the outer peripheral face adjacency, the shape of respective magnet 22, magnet slot 15 with the arcuation perforation, for make rivet 23 inserts described magnet slot 15 along radial direction inboard along a side of portion and several rivet holes 16 that connect and described rivet hole in abutting connection with the position, when forming, rivet hole 16 outwards cuts the extension 19 of formation at this in the zone of outstanding distortion along radial direction, when the deflection that the wide cut of each extension 19 produces when forming than rivet hole 16 was big, its arc length also diameter than rivet hole 16 was big.
The technological innovation of the rotor core of the brshless DC motor of the present invention that above-mentioned structure like this constitutes all has many saving graces for technical staff of the same trade now, and the progressive that possesses skills really.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed or be modified to the equivalent embodiment of equivalent variations, but every technical solution of the present invention content that do not break away from,, all still belong in the scope of technical solution of the present invention any simple modification, equivalent variations and modification that above embodiment did according to technical spirit of the present invention.
Claims (3)
1, a kind of rotor core of brshless DC motor, comprise that steel plate (11) insulation by several disc-shapes laminates the rotor core (10) that forms, abut against the periphery of rotor core (10), along its circumferencial direction with several magnets (21) of uniformly-spaced accommodating combination and the rotating shaft (31) that fuses with the axle center of rotor core (10), central authorities at rotor core (10) connect the axis hole (12) that is formed with insertion rotating shaft (31), accommodate magnet (21, the described magnet slot (14 of perforation rotor core (10) 22), 15) and along its radial direction be distributed in magnet slot (14,15) inboard, and, it is characterized in that along the rivet hole (16) that the axis direction of rotating shaft (31) connects:
At the position, edge of described magnet slot (14,15) and described rivet hole (16) adjacency, form the extension (18,19) of this magnet slot in the mode that cuts to the increasing amplitude of central side.
2, the rotor core of brshless DC motor according to claim 1, the width that it is characterized in that described extension (18,19) when forming described rivet hole (16) cause that the width of deflection is big.
3, the rotor core of brshless DC motor according to claim 1 and 2 is characterized in that the arcuation length of described extension (18,19) is bigger than the diameter of described rivet hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021567530A CN1315242C (en) | 2002-12-17 | 2002-12-17 | Rotor core for brushless direct-current machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021567530A CN1315242C (en) | 2002-12-17 | 2002-12-17 | Rotor core for brushless direct-current machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1508946A CN1508946A (en) | 2004-06-30 |
| CN1315242C true CN1315242C (en) | 2007-05-09 |
Family
ID=34236382
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021567530A Expired - Fee Related CN1315242C (en) | 2002-12-17 | 2002-12-17 | Rotor core for brushless direct-current machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1315242C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110858734A (en) * | 2018-08-20 | 2020-03-03 | 无锡小天鹅电器有限公司 | Rotor, motor and washing machine |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1051654C (en) * | 1992-08-12 | 2000-04-19 | 精工爱普生株式会社 | Permanent magnetic rotator of brushless electric motor and manufacture thereof |
| CN1283889A (en) * | 1999-08-06 | 2001-02-14 | 爱德利工业股份有限公司 | Permanent-megnet electric motor |
| CN1352481A (en) * | 2000-11-10 | 2002-06-05 | 株式会社三协精机制作所 | Permanent magnetic baried type motor and its producing method |
-
2002
- 2002-12-17 CN CNB021567530A patent/CN1315242C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1051654C (en) * | 1992-08-12 | 2000-04-19 | 精工爱普生株式会社 | Permanent magnetic rotator of brushless electric motor and manufacture thereof |
| CN1283889A (en) * | 1999-08-06 | 2001-02-14 | 爱德利工业股份有限公司 | Permanent-megnet electric motor |
| CN1352481A (en) * | 2000-11-10 | 2002-06-05 | 株式会社三协精机制作所 | Permanent magnetic baried type motor and its producing method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1508946A (en) | 2004-06-30 |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070509 Termination date: 20100118 |