CN105529853A - Rotor housing and outer rotor motor - Google Patents
Rotor housing and outer rotor motor Download PDFInfo
- Publication number
- CN105529853A CN105529853A CN201610102617.3A CN201610102617A CN105529853A CN 105529853 A CN105529853 A CN 105529853A CN 201610102617 A CN201610102617 A CN 201610102617A CN 105529853 A CN105529853 A CN 105529853A
- Authority
- CN
- China
- Prior art keywords
- rotor case
- guide frame
- sidewall
- magnet ring
- rotor
- 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.)
- Pending
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The present invention provides a rotor housing and an outer rotor motor. The interior of the rotor housing is used for mounting a magnetic ring; the rotor housing comprises a base and a side wall formed by extending from the base, wherein a free end of the side wall is provided with a guide structure circumferentially arranged on the side wall; and an inner diameter of the guide structure is greater than that of the side wall. The present invention reasonably designs the guide structure of the rotor housing, to effectively avoid that the magnetic ring is destroyed because of being pressed into the rotor housing during motor production; a position limiting structure is formed by stamping the guide structure, to ensure the fixation of an axial position of the magnetic ring and avoid the axial endplay of the magnetic ring in the rotor housing; and a reasonable slotting design can ensure the determination of a position of a joint when the magnetic ring is pressed into the rotor housing, to avoid a magnetizing problem.
Description
Technical field
The present invention relates to field of electromechanical technology, particularly a kind of rotor case and external rotor electric machine.
Background technology
The rotor of existing external rotor electric machine is generally made up of armature spindle, rotor case (as shown in Figure 1) and permanent magnet.Wherein permanent magnet is arranged in rotor case, and permanent magnet surfaces contacts with rotor case inner surface.Wherein, consider that the general strip-shaped rubber ferrite that adopts (is not shown in detail figure) after tentatively rolling into magnet ring, in press-in rotor case from technique, cost aspect.But existing rotor mainly contains following shortcoming:
1, when being pressed into magnet ring, finally roll up circle because now magnet ring does not complete, magnet ring external diameter is greater than rotor case internal diameter, there is the risk of structural deterioration, be squeezed and split as magnet ring when therefore both coordinate.
2, this rotor case designs because ring axial magnetic does not have position limiting structure, and under some operating mode, magnet ring may occur axial endplay, affects the stability of motor.
3, because magnet ring is rolled by magnetic stripe, there is seam in magnet ring Cheng Yuanhou, when magnetizing in order to ensure the effect that magnetizes, should avoid magnetizing at seam crossing as far as possible, but this design cannot be guaranteed that magnet ring seam is relative with rotor case position and determines.
In view of this, in order to solve at least one above-mentioned technical problem, the invention provides a kind of rotor case and external rotor electric machine.
Summary of the invention
For the problems referred to above, the object of this invention is to provide a kind of rotor case and external rotor electric machine, it can solve situation that magnet ring press-in when motor is produced may occur that magnet ring is destroyed, technical problem that ring axial magnetic play situation that motor occurs when running and/or magnet ring cannot guarantee to avoid magnet ring seam crossing when magnetizing.
For reaching above-mentioned purpose, the invention provides a kind of rotor case, its be have internal cavities for hold magnet ring cylindrical tube structure, the sidewall that this cylindrical tube structure comprises annular and the bottom surface connected with one end of this sidewall, the other end of described sidewall is unlimited free end, the free end of wherein said sidewall is provided with the guide frame along the sidewall internal cavities for magnet ring being fit into described rotor case circumferentially, and the inner surface of described guide frame is towards the structure away from the truncated conical shape of the direction flaring of the free end of described sidewall.
Preferably, the inner surface of described guide frame is equal with the internal diameter of the free end joint of described sidewall, and the inner surface of described guide frame is greater than the internal diameter of described sidewall away from the internal diameter of the free end of described sidewall.
Preferably, bus angle formed by intersection of the cylindrical tube structure that each bus on the inner surface of described guide frame contacts with it is an obtuse angle.
Preferably, the bus of the cylindrical tube structure that the extended line of each bus on the inner surface of described guide frame contacts with it in the scope of angle formed by intersection in 15 ~ 30 °.
Preferably, the diameter of the outer surface of described guide frame is equal with the external diameter of described cylindrical tube structure.
Preferably, the coefficient of friction of the inner surface of described guide frame is less than the coefficient of friction of the inner surface of sidewall.
Preferably, the inner surface of described guide frame is also provided with chamfering with the free end inner surface joint of described sidewall.
Preferably, the end surface thickness of the end opposite of holding that connects with described sidewall of described guide frame is 0.5-1mm.
Preferably, when magnet ring is pressed in rotor case, to the center position punching press guide frame of rotor case, guide frame is made to be formed as carrying out the spacing position limiting structure of axis direction perpendicular to the axis direction of described rotor case to described magnet ring.
Preferably, described guide frame be circumferentially provided with at least one fluting.
The present invention also provides a kind of external rotor electric machine, and it comprises the rotor case according to aforementioned any one.
Beneficial effect of the present invention: the present invention, by the guide frame of appropriate design rotor case, effectively prevent magnet ring when motor is produced and is destroyed because of press-in rotor case; And form position limiting structure by punching press guide frame, guarantee the fixing of ring axial magnetic position, avoid the axial endplay of magnet ring in rotor case; The position designing seam crossing when can ensure magnet ring press-in rotor case by rationally slotting is determined, avoids the problem that magnetizes to occur.
Above-mentioned explanation is only the general introduction of technical solution of the present invention, in order to better understand technological means of the present invention, and can be implemented according to the content of specification, coordinates accompanying drawing to be described in detail as follows below with preferred embodiment of the present invention.
Accompanying drawing explanation
Also will be described in more detail the present invention with reference to accompanying drawing based on embodiment hereinafter.Wherein:
Fig. 1 is the structural representation of existing rotor case;
Fig. 2 is the structural representation of rotor case of the present invention (before assembling state);
Fig. 3 is the cutaway view of rotor case of the present invention;
Fig. 4 is the partial enlarged drawing of part A in Fig. 3;
Fig. 5 is the structural representation of rotor case of the present invention (after assembling state);
Fig. 6 is the structural representation of rotor case of the present invention and magnet ring.
In the accompanying drawings, identical parts use identical Reference numeral.Accompanying drawing is not according to the ratio of reality.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in Figure 2, be the structural representation of rotor case of the present invention (assembling before state).Described rotor case 1 for have internal cavities for hold magnet ring 2 (see Fig. 6) cylindrical tube structure.Rotor case 1 (i.e. cylindrical tube structure) comprising: the sidewall 12 of annular and the bottom surface 11 (being preferably rounded bottom surface) connected with one end of this sidewall, the other end of described sidewall 12 is unlimited free end.The free end of described sidewall 12 is provided with the guide frame 13 along sidewall 12 internal cavities for magnet ring being fit into described rotor case circumferentially, and the inner surface of described guide frame 13 is the structure towards the truncated conical shape (being preferably horn mouth shape) away from the direction flaring of the free end of described sidewall.By arranging the guide frame of the truncated conical shape of outside flaring, finally circle is rolled up because now magnet ring 2 does not complete, when effectively can ensure that motor is produced, magnet ring portion press-in rotor case can little by little reduce its external diameter, and then be finally pressed into safely in (slipping into along guide frame) rotor case, efficiently avoid its external diameter when magnet ring being pressed into rotor case and reduce suddenly and the generation of the phenomenon causing magnet ring to be destroyed.
Preferably, the internal diameter of described guide frame 13 is greater than the internal diameter of sidewall 12, therefore when being pressed into magnet ring 2, finally circle is rolled up because now magnet ring 2 does not complete, magnet ring 2 external diameter is greater than the internal diameter of the sidewall 12 of rotor case, therefore magnet ring 2 be easier to enter into have compared with large diameter guide frame 13 enclose the space of putting, and then be easy to enter into sidewall 12 enclose the space (namely in rotor case 1) of putting, thus effectively avoid the risk that magnet ring structure destroys.
Enter in rotor case 1 more easily to impel magnet ring 2 further, preferably, the inner surface of described guide frame 13 is equal with the internal diameter of the free end joint of described sidewall 12, and the inner surface of described guide frame 13 is greater than the internal diameter of described sidewall 12 away from the internal diameter of the free end of described sidewall 12.Specifically see Fig. 3 and Fig. 4, bus angle formed by intersection of the cylindrical tube structure that each bus on the inner surface of described guide frame contacts with it is an obtuse angle, so just effectively make inner surface be the shape of flaring along the direction away from the free end of sidewall, and then ensure that the generation avoiding situation about being destroyed in magnet ring press-in rotor case process.And the bus of cylindrical tube structure that contacts with it of the extended line of each bus on the inner surface of described guide frame in the scope of angle α formed by intersection in 15 ~ 30 °, this is preferred angular range value, but not as limit, if angle is excessive, the deformation then caused in magnet ring process of press in is larger, extruding force is comparatively strong, there is the risk damaging magnet ring; If this angle is less, then in importing process, guide effect is not obvious; Through testing authentication, this angular range internal magnetic ring press-in rotor case effect is comparatively obvious.Therefore, when magnet ring 2 touches guide frame 13, the inside of rotor case 1 can be pressed into along the inner surface of guide frame 13.
In addition, the diameter of the outer surface of described guide frame 13 is equal with the external diameter of described cylindrical tube structure.Can ensure that the external diameter surface of guide frame is concordant with the external diameter surface of cylindrical tube structure like this, smoothly transit, the two can one-body moldedly be processed, the resistance of running brought when simultaneously also preventing both unequal and the generation of other unnecessary situations, ensure that the normal effective of rotor runs, improve operational efficiency.
Enter in rotor case 1 to impel magnet ring 2 more further, the coefficient of friction of the inner surface of described guide frame 13 is set to the coefficient of friction of the inner surface being less than sidewall, namely the inner surface of guide frame 13 is more smooth than the inner surface of sidewall, makes magnet ring more can easily load in rotor case via guide frame like this.
Enter in rotor case 1 to further impel magnet ring 2, the inner surface of guide frame 13 also can arrange undercut ss with the free end inner surface joint of sidewall 12, in other words, undercut ss makes to be in arc transition between the inner surface of the inner surface of guide frame 13 and sidewall 12, and not there is wedge angle, therefore can more easily magnet ring 2 be pressed in rotor case 1, and the wedge angle that can not be directed between structure 13 and sidewall 12 interfered, and avoids magnet ring 2 outer surface to be scratched.For realizing this object, the radius of undercut ss can be very large.
In addition, defining described guide frame 13 along the length of the axial direction of rotor case 1 is L, the end surface thickness of the free end of guide frame 13 is W, wherein, the end surface thickness W of guide frame 13 free end should tentatively roll into round external diameter design according to magnet ring 2, different according to the size of rotor case 1, the size of end surface thickness W is generally 0.5-1mm.Certainly, when more extreme, end surface thickness W's is also feasible close to zero, this means that the free end of guide frame 13 is wedge shape, can reach equally to be convenient to magnet ring 2 and to enter rotor case 1 and avoid damaging the object of magnet ring 2; But when W close to 0 time, rotor case may be caused to be out of shape during press-in magnet ring 2, and W close to 0 time acute angle is comparatively sharp may cause damage to magnet ring.
As shown in Figure 5, be the structural representation of rotor case of the present invention (assembling after state).When magnet ring 2 is pressed in rotor case 1, to the center position punching press guide frame 13 of rotor case 1, the axis direction making guide frame 13 be essentially perpendicular to described rotor case 1 carries out the spacing position limiting structure of axis direction 14 to described magnet ring 2.Magnet ring 2 can be limited in the inside of rotor case 1 by described position limiting structure 14, avoids magnet ring 2 that axial play occurs in rotor case 1, improves its stability; The position limiting structure 14 formed after punching press can have a part of covering effect to magnet ring 2 end face, and when impact has transducer to control, electromechanical transducer obtains signal, and the length L therefore in Fig. 4 should choose suitable size, ensures that transducer is not positioned at above covering place.Whether suitable size is mainly considered 1, is enough to play position-limiting action; 2, whether affect magnet ring magnetic field to be obtained by transducer; 1, L size is generally not less than to 1/3 of magnet ring radial thickness; For 2, depend on whether sensor installation and sensing station.For position-sensorless control mode, the size of length L can be chosen according to technique etc.And, because guide frame 13 is thinner relative to sidewall 12, be therefore convenient to strike out position limiting structure 14.
Shown in last composition graphs 6, described guide frame 13 be circumferentially provided with at least one fluting 15, the length of described fluting 15 can be less than the length L of guide frame 13, or equals length L.By the guide frame 13 in rotor case 1 arranges fluting 15, during magnet ring press-in, the fluting 15 on the guide frame 13 of rotor case 1 is aimed at by press-in device by seam 21 place of magnet ring 2, can realize the determination of rotor case 1 and magnet ring 2 seam crossing relative position.Fluting 15 position according to rotor case 1 when magnetizing can position magnetizing coil, thus avoids seam crossing.
Preferably, when designing the quantity of fluting 15, should consider when magnetizing coil no matter navigate to which slot 15 time, all the other are slotted arbitrarily and 15 to be all in when magnetizing between the two poles of the earth.When the quantity of fluting 15 is one, be convenient to processing, be also convenient to arrange magnetizing coil, but the damage risk of guide frame 13 in punching course can be increased; When the quantity of fluting 15 is more than one, in punching course, the damage risk of guide frame 13 reduces greatly, but too increases generation step and production cost simultaneously, and needs reasonable Arrangement magnetizing coil.Therefore, the quantity designing fluting is as the case may be needed.
According to the structure of rotor case of the present invention, below brief description operation principle of the present invention:
First by magnet ring 2 volume circle, and make magnet ring 2 be pressed in rotor case 1 through guide frame 13, and need one of them fluting 15 ensured in the seam crossing alignment guide structure 1 of magnet ring 2, re-use stamping tool and guide frame 13 is carried out punching press to the direction of rotor case 1, guide frame 13 is made to be essentially perpendicular to the sidewall 12 of rotor case 1, and be formed as position limiting structure 14, magnet ring 2 is limited in the inside of rotor case 1 by described position limiting structure 14, thus completes the assembling of rotor case 1 and magnet ring 2.
The present invention also provides a kind of external rotor electric machine, and it comprises above-mentioned rotor case.
In sum, the present invention has following beneficial effect: the present invention, by the guide frame 13 of appropriate design rotor case, effectively prevent magnet ring 2 when motor is produced and is destroyed because of press-in rotor case 1; And form position limiting structure 14 by punching press guide frame 13, guarantee the fixing of ring axial magnetic position, avoid the axial endplay of magnet ring 2 in rotor case 1; When can ensure that magnet ring 2 is pressed into rotor case 1 by 15 designs of rationally slotting, the position of seam crossing is determined, avoids the problem that magnetizes to occur.
Although invention has been described with reference to preferred embodiment in the explanation of nouns of relevant technical terms, without departing from the scope of the invention, various improvement can be carried out to it and parts wherein can be replaced with equivalent.Especially, only otherwise there is structural hazard, the every technical characteristic mentioned in each embodiment all can combine in any way.The present invention is not limited to specific embodiment disclosed in literary composition, but comprises all technical schemes fallen in the scope of claim.
Claims (11)
1. a rotor case, its be have internal cavities for hold magnet ring cylindrical tube structure, the sidewall that this cylindrical tube structure comprises annular and the bottom surface connected with one end of this sidewall, the other end of described sidewall is unlimited free end, it is characterized in that, the free end of described sidewall is provided with the guide frame along the sidewall internal cavities for magnet ring being fit into described rotor case circumferentially, and the inner surface of described guide frame is towards the structure away from the truncated conical shape of the direction flaring of the free end of described sidewall.
2. rotor case according to claim 1, it is characterized in that, the inner surface of described guide frame is equal with the internal diameter of the free end joint of described sidewall, and the inner surface of described guide frame is greater than the internal diameter of described sidewall away from the internal diameter of the free end of described sidewall.
3. rotor case according to claim 2, is characterized in that, bus angle formed by intersection of the cylindrical tube structure that each bus on the inner surface of described guide frame contacts with it is an obtuse angle.
4. rotor case according to claim 3, is characterized in that, the bus of the cylindrical tube structure that the extended line of each bus on the inner surface of described guide frame contacts with it in the scope of angle formed by intersection in 15 ~ 30 °.
5. rotor case according to any one of claim 1 to 4, is characterized in that, the diameter of the outer surface of described guide frame is equal with the external diameter of described cylindrical tube structure.
6. rotor case according to any one of claim 1 to 5, is characterized in that, the coefficient of friction of the inner surface of described guide frame is less than the coefficient of friction of the inner surface of sidewall.
7. rotor case according to any one of claim 1 to 6, is characterized in that, the inner surface of described guide frame is also provided with chamfering with the free end inner surface joint of described sidewall.
8. rotor case according to any one of claim 1 to 7, is characterized in that, the end surface thickness of the end opposite of holding that connects with described sidewall of described guide frame is 0.5-1mm.
9. rotor case according to any one of claim 1 to 8, it is characterized in that, when magnet ring is pressed in rotor case, to the center position punching press guide frame of rotor case, guide frame is made to be formed as carrying out the spacing position limiting structure of axis direction perpendicular to the axis direction of described rotor case to described magnet ring.
10. rotor case according to any one of claim 1 to 9, is characterized in that, described guide frame be circumferentially provided with at least one fluting.
11. 1 kinds of external rotor electric machines, is characterized in that, comprise rotor case according to any one of claim 1 to 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610102617.3A CN105529853A (en) | 2016-02-24 | 2016-02-24 | Rotor housing and outer rotor motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610102617.3A CN105529853A (en) | 2016-02-24 | 2016-02-24 | Rotor housing and outer rotor motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105529853A true CN105529853A (en) | 2016-04-27 |
Family
ID=55771906
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610102617.3A Pending CN105529853A (en) | 2016-02-24 | 2016-02-24 | Rotor housing and outer rotor motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105529853A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0279145U (en) * | 1988-12-01 | 1990-06-18 | ||
| CN1083619A (en) * | 1992-03-18 | 1994-03-09 | 住友特殊金属株式会社 | The motor of the cylinder type ferrite magnet of radial anisotropic and manufacture method thereof and this magnet of use |
| JPH10145995A (en) * | 1996-11-13 | 1998-05-29 | Denso Corp | Rotor for magnet generator |
| JP2000037054A (en) * | 1998-07-17 | 2000-02-02 | Denso Corp | Magnet type power generator and manufacturer thereof |
| CN205407448U (en) * | 2016-02-24 | 2016-07-27 | 珠海格力节能环保制冷技术研究中心有限公司 | Rotor shell and external rotor electric machine |
-
2016
- 2016-02-24 CN CN201610102617.3A patent/CN105529853A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0279145U (en) * | 1988-12-01 | 1990-06-18 | ||
| CN1083619A (en) * | 1992-03-18 | 1994-03-09 | 住友特殊金属株式会社 | The motor of the cylinder type ferrite magnet of radial anisotropic and manufacture method thereof and this magnet of use |
| JPH10145995A (en) * | 1996-11-13 | 1998-05-29 | Denso Corp | Rotor for magnet generator |
| JP2000037054A (en) * | 1998-07-17 | 2000-02-02 | Denso Corp | Magnet type power generator and manufacturer thereof |
| CN205407448U (en) * | 2016-02-24 | 2016-07-27 | 珠海格力节能环保制冷技术研究中心有限公司 | Rotor shell and external rotor electric machine |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160427 |