CN104617731A - Assembling structure for sensing magnetic ring and rotating shaft of motor rotor - Google Patents
Assembling structure for sensing magnetic ring and rotating shaft of motor rotor Download PDFInfo
- Publication number
- CN104617731A CN104617731A CN201510096223.7A CN201510096223A CN104617731A CN 104617731 A CN104617731 A CN 104617731A CN 201510096223 A CN201510096223 A CN 201510096223A CN 104617731 A CN104617731 A CN 104617731A
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- magnetic ring
- reaction magnetic
- rotating shaft
- main body
- copper sheathing
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- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Manufacture Of Motors, Generators (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention discloses an assembling structure for a sensing magnetic ring and a rotating shaft of a motor rotor, and belongs to the technical field of motor parts. The assembling structure comprises a step-mode rotating shaft, a rotor iron core, a main magnet body, a plastic bushing and a sensing magnetic ring, wherein the step-mode rotating shaft comprises a penetrating part A and a penetrating part B; the sensing magnetic ring comprises a sensing magnetic ring main body and a step-mode liner copper sleeve; the sensing magnetic ring main body and the step-mode liner copper sleeve are in inlaid close-fitting connection; the main magnet body is arranged outside the rotor iron core in a sleeving manner and is in adhesive connection with the rotor iron core; an annular step end surface A is arranged between the penetrating part A and the penetrating part B of the step-mode rotating shaft; an annular step end surface B is arranged in a central hole of the step-mode liner copper sleeve; a rotating shaft pressing fit section is arranged on the right side of the annular step end surface B; an avoiding gap is formed in the left side of the annular step end surface B; the length of the avoiding gap is greater than that of the matching section of the sensing magnetic ring main body. The assembling structure has the benefits that the sensing magnetic ring does not move and crack; the problems that sensing magnetic ring magnetic lines are distributed unevenly and the magnetic flux is low can be solved; the sensing of a Hall sensor does not fail; a motor can operate normally.
Description
Technical field
This product is the assembly structure of motor rotor, and particularly the reaction magnetic ring of motor rotor and rotating shaft assembling structure, belong to motor part technical field.
Background technology
Permanent-magnet brushless DC electric machine not only has that conventional DC brush efficiency is high, starting performance good and the advantage such as good speed adjustment features, and has that the life-span is long, reliability is high, noise is low, can be used for the features such as explosion-proof occasion, and in actual production, application widely.
But in Conventional permanent magnet DC brushless motor, reaction magnetic ring positional precision cannot ensure.As Fig. 1-1, as shown in Figure 1-2, all the optical axis and the reaction magnetic ring close-fitting that adopt circle, the position of reaction magnetic ring is controlled by machine die clamper, reaction magnetic ring shifting phenomena is easily there is in whole magnetizing process, or when reaction magnetic ring magnetizes and magnetized head to there is gap large, thus the reaction magnetic ring surface after magnetizing cannot meet instructions for use, reaction magnetic ring magnetic line of force skewness and the little problem of magnetic flux can be produced.
As everyone knows, in permanent-magnet brushless DC electric machine, the position of reaction magnetic ring and Hall element is vital, and Hall element is used for measuring the rotor-position of motor and rotating speed, and the installation accuracy of Hall element is directly connected to the operation of permanent-magnet brushless DC electric machine.Under normal circumstances, the selection of corresponding reaction magnetic ring and axle fit tolerance is very difficult.Be difficult to management and control in the design process and hold the cooperation of reaction magnetic ring and axle, to consider on the one hand reaction magnetic ring and axial compression join after evade power, whether another aspect will be considered to be press-fitted rear axle branch can scratch.Exist assembling time reaction magnetic ring break, or client use in complete machine process occur reaction magnetic ring displacement or break, make Hall element respond to lost efficacy, cause motor failure.
So the structure of this design, is not suitable for the high motor shaking and there is axial force, and can not be used for the motor that there is axial force.
Summary of the invention
The object of the invention is in the prior art for above-mentioned permanent-magnet brushless DC electric machine, in assembling and complete machine use procedure, easily there is reaction magnetic ring displacement or break, reaction magnetic ring magnetic line of force skewness and the little problem of magnetic flux can be produced, also Hall element can be made to respond to lost efficacy, cause the defect of motor failure, provide a kind of reaction magnetic ring and rotating shaft assembling structure of motor rotor, can reach in assembling and complete machine use procedure, reaction magnetic ring is not shifted, do not break, reaction magnetic ring magnetic line of force skewness and the little problem of magnetic flux can be solved, also Hall element can be made to respond to can not lose efficacy, the object that motor can run well.
The technical scheme that the present invention takes to achieve these goals is: the reaction magnetic ring of motor rotor and rotating shaft assembling structure, described motor is permanent-magnet brushless DC electric machine, and the reaction magnetic ring of described permanent-magnet brushless DC electric machine rotor and rotating shaft assembling structure comprise rotating shaft, rotor core, main magnet, plastic bushing and reaction magnetic ring; Described rotating shaft comprises and wears portion A and wear portion B, and described rotor core and plastic bushing are located on the portion that the wears A of rotating shaft, and described reaction magnetic ring is located on the portion that the wears B of rotating shaft; Plastic bushing is arranged between rotor core and reaction magnetic ring, is provided with more than 3 plush coppers on the right side of plastic bushing, reaction magnetic ring is provided with more than 3 connecting holes, plush copper is equal with connecting hole quantity, size matches; Plastic bushing and reaction magnetic ring are by plush copper and connecting hole socket connection, and reaction magnetic ring left side coordinates with plastic bushing right side; Reaction magnetic ring comprises reaction magnetic ring main body and liner copper sheathing, and described liner copper sheathing is arranged on inside the centre bore of reaction magnetic ring main body, for close-fitting is connected between reaction magnetic ring main body with liner copper sheathing; Described main magnet is set in the outer and bonding connection of rotor core;
Described rotating shaft is step pattern rotating shaft, the portion that the wears A of step pattern rotating shaft and wear between portion B and be provided with ring-shaped step end face A, the diameter wearing portion B is less than the diameter wearing portion A, and reaction magnetic ring left side coordinates near central part with ring-shaped step end face A and contacts with each other; Reaction magnetic ring left side outer part coordinates with plastic bushing right side;
Described liner copper sheathing is step pattern liner copper sheathing; Being provided with ring-shaped step end face B in step pattern liner copper sheathing centre bore, is the rotating shaft section of being press-fitted on the right side of ring-shaped step end face B; After step pattern liner copper sheathing and rotating shaft are assembled, on the left of ring-shaped step end face B, form empty avoiding gap;
Described step pattern liner copper sheathing outer surface comprises reaction magnetic ring main body and coordinates section and the extroversion section of stretching out; Described empty avoiding gap and reaction magnetic ring main body coordinate the position of section inside and outside corresponding, and the length in empty avoiding gap is greater than the length of reaction magnetic ring main body cooperation section; That is the length in empty avoiding gap is greater than the length of liner copper sheathing and reaction magnetic ring main body auxiliary section, makes the position that is press-fitted of reaction magnetic ring and rotating shaft transfer to completely in the step pattern liner copper sheathing extroversion section of stretching out centre bore like this, avoids reaction magnetic ring position;
Be connected for inlaying close-fitting between described reaction magnetic ring main body with step pattern liner copper sheathing.
Described plastic bushing arranged outside has 8 plush coppers, reaction magnetic ring is provided with 8 connecting holes, and described connecting hole is through hole.
Inwall two ends, described reaction magnetic ring main center hole respectively comprise one section of annular concave arc groove, the reaction magnetic ring main body of described step pattern liner copper sheathing outer surface coordinates section two ends respectively to comprise one section of annular convex arc, the annular concave arc groove of reaction magnetic ring main body and the mutual grafting of annular convex arc of step pattern liner copper sheathing, inlays and is connected.
Compared with prior art, the invention has the beneficial effects as follows:
(1) due to step pattern rotating shaft the portion that wears A and wear between portion B and be provided with ring-shaped step end face A, reaction magnetic ring left side outer part is made to coordinate with ring-shaped step end face and contact with each other, ensure that reaction magnetic ring will cause greatly reaction magnetic ring to be shifted because of cylinder thrust when magnetizing by ring-shaped step end face A, there is not gap between reaction magnetic ring and magnetized head, solve reaction magnetic ring magnetic line of force skewness and the little problem of magnetic flux like this;
(2) because the position that is press-fitted of reaction magnetic ring and rotating shaft is transferred in the step pattern liner copper sheathing extroversion section of stretching out centre bore completely, avoid reaction magnetic ring position, effectively prevent because being press-fitted the bad phenomenon causing reaction magnetic ring to break, thorough like this solve reaction magnetic ring be press-fitted problem, substantially increase conforming product rate, reduce production cost, ensure that product quality;
(3) product stability is good, is applicable to all types of motor product, comprises the motor being suitable for high vibrations and there is axial force.
Accompanying drawing explanation
Fig. 1-1 is: conventional permanent-magnet brushless DC electric machine reaction magnetic ring and axle assemble front sectional view;
Fig. 1-2 is: Fig. 1-1A portion enlarged drawing;
Fig. 2-1 is: reaction magnetic ring of the present invention and axle assemble front sectional view;
Fig. 2-2 is: Fig. 2-1B portion enlarged drawing;
Fig. 3-1 is: induced magnetism of the present invention looks around left view;
Fig. 3-2 is: reaction magnetic ring front sectional view of the present invention;
Fig. 3-3 is: Fig. 3-2C portion enlarged drawing.
Description of reference numerals: rotating shaft 1, wear portion A 101, wear portion B 102, ring-shaped step end face A 103, rotor core 2, main magnet 3, plastic bushing 4, plush copper 401, reaction magnetic ring 5, connecting hole 501, reaction magnetic ring main body 502, liner copper sheathing 503, reaction magnetic ring main body coordinate section 5031, the extroversion section of stretching out 5032, annular concave arc groove 504, annular convex arc 505, ring-shaped step end face B 506, the rotating shaft section of being press-fitted 507, empty avoiding gap 6.
Embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described, but not as a limitation of the invention.
As shown in Fig. 2-1 to Fig. 3-3, the reaction magnetic ring of motor rotor and rotating shaft assembling structure, described motor is permanent-magnet brushless DC electric machine, and the reaction magnetic ring of described permanent-magnet brushless DC electric machine rotor and rotating shaft assembling structure comprise step pattern rotating shaft 1, rotor core 2, main magnet 3, plastic bushing 4 and reaction magnetic ring 5.
Described step pattern rotating shaft 1 comprises and wears portion A 101 and wear portion B 102, and described rotor core 2 and plastic bushing 4 are located on the portion that the wears A 101 of step pattern rotating shaft 1, and described reaction magnetic ring 5 is located on the portion that the wears B 102 of step pattern rotating shaft 1; Plastic bushing 4 is arranged between rotor core 2 and reaction magnetic ring 5, is provided with 8 plush coppers 401 on the right side of plastic bushing 4, reaction magnetic ring 5 is provided with 8 connecting holes 501, and plush copper 401 and connecting hole 501 size match; Plastic bushing 4 and reaction magnetic ring 5 are by plush copper 401 and connecting hole 501 socket connection, and reaction magnetic ring 5 left side coordinates with plastic bushing 4 right side.
The portion that the wears A 101 of described step pattern rotating shaft 1 and wear between portion B 102 and be provided with ring-shaped step end face A 103, the diameter wearing portion B 102 is less than the diameter wearing portion A 101, and reaction magnetic ring 5 left side coordinates near central part with ring-shaped step end face A 103 and contacts with each other; Reaction magnetic ring 5 left side outer part coordinates with plastic bushing 4 right side.
Described reaction magnetic ring 5 comprises reaction magnetic ring main body 502 and step pattern liner copper sheathing 503, described step pattern liner copper sheathing 503 is arranged on inside the centre bore of reaction magnetic ring main body 502, described reaction magnetic ring main body 502 center bore inner wall two ends respectively comprise one section of annular concave arc groove 504, the reaction magnetic ring main body of described step pattern liner copper sheathing 503 outer surface coordinates section 5031 two ends respectively to comprise one section of annular convex arc 505, the annular concave arc groove 504 of reaction magnetic ring main body 502 and annular convex arc 505 grafting mutually of step pattern liner copper sheathing 503, inlay connection, thus make to be connected for inlaying close-fitting between reaction magnetic ring main body 502 with step pattern liner copper sheathing 503, described main magnet 3 is set in the outer and bonding connection of rotor core 2.
Being provided with ring-shaped step end face B 506 in described step pattern liner copper sheathing 503 centre bore, is the rotating shaft section of being press-fitted 507 on the right side of ring-shaped step end face B 506; After step pattern liner copper sheathing 503 and rotating shaft 1 are assembled, on the left of ring-shaped step end face B 506, form empty avoiding gap 6.
Described step pattern liner copper sheathing 503 outer surface comprises reaction magnetic ring main body and coordinates section 5031 and the extroversion section of stretching out 5032; Described empty avoiding gap 6 and reaction magnetic ring main body coordinate the position of section 5031 inside and outside corresponding, and the length m in empty avoiding gap 6 is greater than the length n of reaction magnetic ring main body cooperation section 5031.
Installation steps: be first pressed in step pattern rotating shaft 1 by rotor core 2 hydraulic press (not shown), are then fixed on rotor core 2 by main magnet 3 anaerobic adhesive, form tape spool rotor core 2 assembly; Then plastic bushing 4 is enclosed within reaction magnetic ring 5, locates with 8 connecting holes 501, form plastic bushing 4 and reaction magnetic ring 5 assembly; Finally by plastic bushing 4 and reaction magnetic ring 5 assembly disposable press-in tape spool rotor core 2 assembly, located the position of reaction magnetic ring 5 press-in by ring-shaped step end face A 103.
Above-described embodiment, the just one of the present invention's more preferably embodiment, the usual change that those skilled in the art carries out within the scope of technical solution of the present invention and replacing all should be included in protection scope of the present invention.
Claims (3)
1. the reaction magnetic ring of motor rotor and rotating shaft assembling structure, described motor is permanent-magnet brushless DC electric machine, and the reaction magnetic ring of described permanent-magnet brushless DC electric machine rotor and rotating shaft assembling structure comprise rotating shaft, rotor core, main magnet, plastic bushing and reaction magnetic ring; Described rotating shaft comprises and wears portion A and wear portion B, and described rotor core and plastic bushing are located on the portion that the wears A of rotating shaft, and described reaction magnetic ring is located on the portion that the wears B of rotating shaft; Plastic bushing is arranged between rotor core and reaction magnetic ring, is provided with more than 3 plush coppers on the right side of plastic bushing, reaction magnetic ring is provided with more than 3 connecting holes, plush copper is equal with connecting hole quantity, size matches; Plastic bushing and reaction magnetic ring are by plush copper and connecting hole socket connection, and reaction magnetic ring left side coordinates with plastic bushing right side; Reaction magnetic ring comprises reaction magnetic ring main body and liner copper sheathing, and described liner copper sheathing is arranged on inside the centre bore of reaction magnetic ring main body, for close-fitting is connected between reaction magnetic ring main body with liner copper sheathing; Described main magnet is set in the outer and bonding connection of rotor core, it is characterized in that:
Described rotating shaft is step pattern rotating shaft, the portion that the wears A of step pattern rotating shaft and wear between portion B and be provided with ring-shaped step end face A, and reaction magnetic ring left side coordinates near central part with ring-shaped step end face A and contacts with each other;
Described liner copper sheathing is step pattern liner copper sheathing; Being provided with ring-shaped step end face B in step pattern liner copper sheathing centre bore, is the rotating shaft section of being press-fitted on the right side of ring-shaped step end face B; After step pattern liner copper sheathing and rotating shaft are assembled, on the left of ring-shaped step end face B, form empty avoiding gap;
Described step pattern liner copper sheathing outer surface comprises reaction magnetic ring main body and coordinates section and the extroversion section of stretching out; Described empty avoiding gap and reaction magnetic ring main body coordinate the position of section inside and outside corresponding, and the length in empty avoiding gap is greater than the length of reaction magnetic ring main body cooperation section;
Be connected for inlaying close-fitting between described reaction magnetic ring main body with step pattern liner copper sheathing.
2. the reaction magnetic ring of a kind of motor rotor according to claim 1 and rotating shaft assembling structure, it is characterized in that: described plastic bushing arranged outside has 8 plush coppers, reaction magnetic ring is provided with 8 connecting holes, described connecting hole is through hole.
3. the reaction magnetic ring of a kind of motor rotor according to claim 1 and rotating shaft assembling structure, it is characterized in that: inwall two ends, described reaction magnetic ring main center hole respectively comprise one section of annular concave arc groove, the reaction magnetic ring main body of described step pattern liner copper sheathing outer surface coordinates section two ends respectively to comprise one section of annular convex arc, the annular concave arc groove of reaction magnetic ring main body and the mutual grafting of annular convex arc of step pattern liner copper sheathing, inlays and is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510096223.7A CN104617731B (en) | 2015-03-04 | 2015-03-04 | The reaction magnetic ring of motor rotor and rotating shaft assembling structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510096223.7A CN104617731B (en) | 2015-03-04 | 2015-03-04 | The reaction magnetic ring of motor rotor and rotating shaft assembling structure |
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| Publication Number | Publication Date |
|---|---|
| CN104617731A true CN104617731A (en) | 2015-05-13 |
| CN104617731B CN104617731B (en) | 2016-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510096223.7A Active CN104617731B (en) | 2015-03-04 | 2015-03-04 | The reaction magnetic ring of motor rotor and rotating shaft assembling structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108718137A (en) * | 2018-05-29 | 2018-10-30 | 浙江德宏汽车电子电器股份有限公司 | A kind of motor rotation axis shaft end position sensor assembly |
| CN112217370A (en) * | 2019-07-09 | 2021-01-12 | 大族激光科技产业集团股份有限公司 | Tubular linear motor rotor |
Citations (9)
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| JPH06327212A (en) * | 1993-05-12 | 1994-11-25 | Matsushita Electric Ind Co Ltd | Rotor of brushless motor |
| EP1003270A1 (en) * | 1998-11-19 | 2000-05-24 | Moriyama Kogyo Kabushiki Kaisha | Magnetic pole position detector and annular sheet with sheet-like magnets for a brushless DC motor |
| JP2002058186A (en) * | 2000-08-07 | 2002-02-22 | Matsushita Seiko Co Ltd | Dc motor |
| JP2004048829A (en) * | 2002-07-08 | 2004-02-12 | Nidec Shibaura Corp | Brushless dc motor |
| JP2008206354A (en) * | 2007-02-22 | 2008-09-04 | Mitsuba Corp | Brushless motor |
| JP2009284658A (en) * | 2008-05-22 | 2009-12-03 | Asmo Co Ltd | Rotor and motor |
| CN201708673U (en) * | 2010-07-01 | 2011-01-12 | 中山大洋电机制造有限公司 | Motor rotor system |
| CN102480204A (en) * | 2010-11-26 | 2012-05-30 | 中山大洋电机股份有限公司 | Rotor assembly |
| CN204408155U (en) * | 2015-03-04 | 2015-06-17 | 余姚市爱优特电机有限公司 | The reaction magnetic ring of motor rotor and rotating shaft assembling structure |
-
2015
- 2015-03-04 CN CN201510096223.7A patent/CN104617731B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06327212A (en) * | 1993-05-12 | 1994-11-25 | Matsushita Electric Ind Co Ltd | Rotor of brushless motor |
| EP1003270A1 (en) * | 1998-11-19 | 2000-05-24 | Moriyama Kogyo Kabushiki Kaisha | Magnetic pole position detector and annular sheet with sheet-like magnets for a brushless DC motor |
| JP2002058186A (en) * | 2000-08-07 | 2002-02-22 | Matsushita Seiko Co Ltd | Dc motor |
| JP2004048829A (en) * | 2002-07-08 | 2004-02-12 | Nidec Shibaura Corp | Brushless dc motor |
| JP2008206354A (en) * | 2007-02-22 | 2008-09-04 | Mitsuba Corp | Brushless motor |
| JP2009284658A (en) * | 2008-05-22 | 2009-12-03 | Asmo Co Ltd | Rotor and motor |
| CN201708673U (en) * | 2010-07-01 | 2011-01-12 | 中山大洋电机制造有限公司 | Motor rotor system |
| CN102480204A (en) * | 2010-11-26 | 2012-05-30 | 中山大洋电机股份有限公司 | Rotor assembly |
| CN204408155U (en) * | 2015-03-04 | 2015-06-17 | 余姚市爱优特电机有限公司 | The reaction magnetic ring of motor rotor and rotating shaft assembling structure |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108718137A (en) * | 2018-05-29 | 2018-10-30 | 浙江德宏汽车电子电器股份有限公司 | A kind of motor rotation axis shaft end position sensor assembly |
| CN112217370A (en) * | 2019-07-09 | 2021-01-12 | 大族激光科技产业集团股份有限公司 | Tubular linear motor rotor |
| CN112217370B (en) * | 2019-07-09 | 2022-07-05 | 大族激光科技产业集团股份有限公司 | Tubular linear motor rotor |
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| Publication number | Publication date |
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| CN104617731B (en) | 2016-11-23 |
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