CN205304470U - Stator structure of drag cup permanent magnetism direct current micromotor - Google Patents
Stator structure of drag cup permanent magnetism direct current micromotor Download PDFInfo
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- CN205304470U CN205304470U CN201521123861.5U CN201521123861U CN205304470U CN 205304470 U CN205304470 U CN 205304470U CN 201521123861 U CN201521123861 U CN 201521123861U CN 205304470 U CN205304470 U CN 205304470U
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- direct current
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Abstract
The utility model discloses a stator structure of drag cup permanent magnetism direct current micromotor, including bush, magnet steel and steel bushing, the bush is inside to be equipped with a passageway along its axial, and the one end that the axle passageway is close to the rotor is equipped with the inner bearing room, and the one end of keeping away from the rotor is equipped with the outer bearing room, the outer bearing indoor with the indoor antifriction bearing that is equipped with of inner bearing, the magnet steel is both ends open -ended hollow structure, and the magnet steel includes first portion of cup jointing and the second portion of cup jointing coaxial and that the external diameter equals, and the internal diameter of the first portion of cup jointing is greater than the internal diameter of the second portion of cup jointing, and the magnet steel cover is located outside the bush, the inner wall of the second portion of cup jointing cooperates with the outer wall of bush, forms annular gap between the inner wall of the first portion of cup jointing and the outer wall of inner bearing room, the steel bushing is located in the annular gap, this steel bushing outer wall cooperates with the inner wall of the first portion of cup jointing, and this steel bushing inner wall cooperates with the outer wall of inner bearing room, the utility model provides high magnet steel magnetic field intensity.
Description
Technical field
The utility model relates to hollow cup permanent magnetic direct current micromotor technical field, more specifically relates to the stator structure of a kind of hollow cup permanent magnetic direct current micromotor.
Background technology
Hollow cup permanent magnetic direct current micromotor is because volume is little, torque big, efficiency advantages of higher is widely used in medical instruments field. Hollow cup permanent magnetic direct current micromotor is for assembling rolling bearing conventional design as shown in Figure 1, stator structure comprises machine shell 1, lining 2, magnet steel 3, rolling bearing 4 and steel bushing 5, steel bushing 5 is assemblied in outside lining 2, magnet steel 3 is assemblied in outside steel bushing 5, machine shell 1 is socketed on lining 2, in lining 2 bearing chamber, it is respectively charged into rolling bearing, it is assembled into motor stator, then be assembled into complete motor with rotor and end cap. The torque that hollow cup permanent magnetic direct current micromotor produces produces the magnetic field generation interaction force of magnetic field and stator permanent magnet by rotor windings energising and rotates, design being considered, rolling bearing installs the working accuracy of bearing chamber, it is necessary to select the lining of aluminum alloy material. Compare oil bearing due to rolling bearing external diameter can significantly increase, the interior hole of magnet steel can be amplified by design and assemble, this just cause magnet steel relative subtract thin, magneticstrength reduces, on identical rotor electrical property, the motor torque of rolling bearing design obviously reduces.
Practical novel content
For solving above-mentioned problems of the prior art, the utility model provides the stator structure of a kind of hollow cup permanent magnetic direct current micromotor, the internal diameter of the first socket part on magnet steel is set to be less than the internal diameter of the 2nd socket part, the inwall of the 2nd socket part coordinates with the outer wall of lining, so only reduce the internal diameter of the first socket part, the internal diameter of the 2nd socket part is constant, thus improves magnet steel magneticstrength.
The technical solution of the utility model is: the stator structure of a kind of hollow cup permanent magnetic direct current micromotor, comprise lining, magnet steel and steel bushing, described bush inside is axially arranged with axis channel along it, described axis channel is provided with neck bearing room near one end of rotor, one end away from rotor is provided with outer bearing room, and described outer bearing is indoor is provided with rolling bearing with described neck bearing indoor;
Described magnet steel is the hollow structure of both ends open, described magnet steel comprises the first coaxial socket part and the 2nd socket part, the internal diameter of described first socket part is greater than the internal diameter of described 2nd socket part, described magnetic steel sleeve is located at outside described lining, the described inwall of the 2nd socket part coordinates with the outer wall of described lining, forms circular clearance between the inwall of described first socket part and the outer wall of described neck bearing room;
Described steel bushing is located in described circular clearance, and this steel bushing outer wall coordinates with the inwall of the first socket part, and this steel bushing inwall coordinates with the outer wall of neck bearing room.
Described first socket part and described 2nd socket part are one-body molded.
The outer wall of described lining forms four annular step surfaces, is followed successively by the first step surface, the 2nd step surface, the 3rd step surface and the 4th step surface from top to bottom, and the inwall of shell coordinates with the 3rd step surface, and the 2nd socket part coordinates with the first step surface.
Described lining adopts aluminum alloy materials to make.
The stator structure of the hollow cup permanent magnetic direct current micromotor that the utility model proposes, the internal diameter of the first socket part on magnet steel is set to be less than the internal diameter of the 2nd socket part, the inwall of the 2nd socket part coordinates with the outer wall of lining, so only reduce the internal diameter of the first socket part, the internal diameter of the 2nd socket part is constant, thus improves magnet steel magneticstrength.
Accompanying drawing explanation
Fig. 1 is stator architecture figure in prior art;
Fig. 2 is the utility model stator architecture figure.
Embodiment
As shown in Figure 2, the stator structure of the hollow cup permanent magnetic direct current micromotor that the utility model proposes, comprise shell 1, lining 2, magnet steel 3 and steel bushing 5, lining 2 inside is axially arranged with axis channel 21 along it, axis channel 21 is provided with neck bearing room 22 near one end of rotor, and the one end away from rotor is provided with outer bearing room 23, is equipped with rolling bearing 4 in outer bearing indoor 23 and neck bearing room 22, the diameter of rolling bearing 4 is greater than the diameter of axis channel 21, and lining adopts aluminum alloy materials to make.
Magnet steel 3 is the hollow structure of both ends open, magnet steel 3 comprises the first socket part 31 and the 2nd socket part 32, first socket part 31 and the 2nd socket part 32 are coaxial and external diameter is equal, the internal diameter of the first socket part 31 is greater than the internal diameter of the 2nd socket part 32, magnet steel 3 is sheathed on outside lining 2, the inwall of the 2nd socket part 32 coordinates with the outer wall of lining 2, forms circular clearance between the inwall of the first socket part 31 and the outer wall of neck bearing room 22. Steel bushing 5 is located in circular clearance, and steel bushing 5 outer wall coordinates with the inwall of the first socket part 31, and steel bushing 5 inwall coordinates with the outer wall of neck bearing room 22.
In the present embodiment, the first socket part 31 and the 2nd socket part 32 are one-body molded.
The outer wall of lining 2 forms four annular step surfaces, is followed successively by the first step surface, the 2nd step surface, the 3rd step surface and the 4th step surface from top to bottom, and the inwall of shell 1 coordinates with the 3rd step surface, and the 2nd socket part 32 coordinates with the first step surface.
The utility model by being set to be less than the internal diameter of the 2nd socket part by the internal diameter of the first socket part on magnet steel, the inwall of the 2nd socket part coordinates with the outer wall of lining, so only reducing the internal diameter of the first socket part, the internal diameter of the 2nd socket part is constant, thus improves magnet steel magneticstrength.
Above specific embodiment is only in order to illustrate design of the present utility model, and the those of ordinary skill of this area can make various deformation and change under design of the present utility model, and these distortion and change include within protection domain of the present utility model.
Claims (4)
1. the stator structure of a hollow cup permanent magnetic direct current micromotor, comprise lining (2), magnet steel (3) and steel bushing (5), described bush inside is axially arranged with axis channel (21) along it, described axis channel is provided with neck bearing room (22) near one end of rotor, one end away from rotor is provided with outer bearing room (23), and described outer bearing is indoor is provided with rolling bearing (4) with described neck bearing indoor;
It is characterized in that: described magnet steel is the hollow structure of both ends open, described magnet steel comprises coaxial and that external diameter is equal the first socket part (31) and the 2nd socket part (32), the internal diameter of described first socket part is greater than the internal diameter of described 2nd socket part, described magnetic steel sleeve is located at described lining (2) outward, the described inwall of the 2nd socket part coordinates with the outer wall of described lining, forms circular clearance between the inwall of described first socket part and the outer wall of described neck bearing room (22);
Described steel bushing is located in described circular clearance, and this steel bushing outer wall coordinates with the inwall of the first socket part (31), and this steel bushing inwall coordinates with the outer wall of neck bearing room (22).
2. the stator structure of hollow cup permanent magnetic direct current micromotor according to claim 1, it is characterised in that: described first socket part (31) and described 2nd socket part (32) are one-body molded.
3. the stator structure of hollow cup permanent magnetic direct current micromotor according to claim 1, it is characterized in that: the outer wall of described lining (2) forms four annular step surfaces, it is followed successively by the first step surface, the 2nd step surface, the 3rd step surface and the 4th step surface from top to bottom, the inwall of shell (1) coordinates with the 3rd step surface, and the 2nd socket part coordinates with the first step surface.
4. the stator structure of hollow cup permanent magnetic direct current micromotor according to claim 3, it is characterised in that: described lining (2) adopts aluminum alloy materials to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521123861.5U CN205304470U (en) | 2015-12-31 | 2015-12-31 | Stator structure of drag cup permanent magnetism direct current micromotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521123861.5U CN205304470U (en) | 2015-12-31 | 2015-12-31 | Stator structure of drag cup permanent magnetism direct current micromotor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205304470U true CN205304470U (en) | 2016-06-08 |
Family
ID=56469607
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521123861.5U Active CN205304470U (en) | 2015-12-31 | 2015-12-31 | Stator structure of drag cup permanent magnetism direct current micromotor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205304470U (en) |
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2015
- 2015-12-31 CN CN201521123861.5U patent/CN205304470U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Zhang Zhenjian Inventor after: Zhang Lv Inventor after: Wang Changjun Inventor before: Zhang Zhenjian Inventor before: Zhang Lv Inventor before: Wang Changjun |
|
| COR | Change of bibliographic data | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220921 Address after: Room 603, 501, 5th Floor, Ruihui Building, Watch Base, Mashantou Community, Matian Street, Guangming District, Shenzhen, Guangdong Province Patentee after: Shenzhen dedaxing Drive Technology Co.,Ltd. Address before: 518000 Guangdong Shenzhen Futian District Che Kung Temple Tianan science and Technology Pioneer Park A701 room Patentee before: SHENZHEN CANGXINGDA TECHNOLOGY Co.,Ltd. |