CN110912329B - Electric machine - Google Patents
Electric machine Download PDFInfo
- Publication number
- CN110912329B CN110912329B CN201911298703.6A CN201911298703A CN110912329B CN 110912329 B CN110912329 B CN 110912329B CN 201911298703 A CN201911298703 A CN 201911298703A CN 110912329 B CN110912329 B CN 110912329B
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- CN
- China
- Prior art keywords
- end cover
- mounting column
- motor
- long bearing
- end cap
- 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.)
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-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/24—Casings; Enclosures; Supports specially adapted for suppression or reduction of noise or vibrations
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Frames (AREA)
Abstract
The invention discloses a motor, which comprises a first end cover, a second end cover, a long bearing, a stator component and a rotor component which are oppositely arranged, the first end cover extends towards the second end cover to form a mounting column, the second end cover extends towards the second end cover to form a sleeve part sleeved on the periphery of the mounting column, a radial gap is reserved between the sleeve part and the mounting column, the long bearing is sleeved on the periphery of the mounting column and is positioned in the radial gap, the stator component is arranged on the periphery of the sleeve part, the rotor component is annularly arranged and sleeved on the periphery of the stator component, the rotor component is fixedly connected with the second end cover, wherein an end of the long bearing adjacent the first end cap extends to a region between the stator assembly and the mounting post, and an end of the long bearing adjacent the second end cap extends to the second end cap; the motor provided by the invention has small jitter and small noise.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a motor.
Background
At present, motors (such as micro special motors) running at high speed in the market are more and more, such as brushless motors applied to unmanned aerial vehicles, motors applied to household appliances, motors applied to electric shavers, motors applied to hair dryers, fan motors and the like. While the high-speed motor brings convenience to electric devices, various problems such as high noise, large jitter, inconvenience and insecurity in holding can be caused.
Disclosure of Invention
The invention mainly aims to provide a motor, and aims to solve the problems of high noise and large jitter of the conventional motor.
To achieve the above object, the present invention provides a motor including:
the first end cover and the second end cover are oppositely arranged, the first end cover extends towards the second end cover to form a mounting column, the second end cover extends towards the second end cover to form a sleeve part sleeved on the periphery of the mounting column, and a radial gap is reserved between the sleeve part and the mounting column;
the long bearing is sleeved on the periphery of the mounting column and is positioned in the radial gap;
a stator assembly provided on the outer periphery of the sleeve portion;
the rotor assembly is annularly arranged and sleeved on the periphery of the stator assembly, and the rotor assembly is fixedly connected with the second end cover;
wherein an end of the long bearing adjacent the first end cap extends to a region between the stator assembly and the mounting post, and an end of the long bearing adjacent the second end cap extends to the second end cap.
Optionally, the motor is a micro-electric motor.
Optionally, the long bearing is an oil bearing.
Optionally, the rotor assembly comprises a magnetic ring, and the magnetic ring is arranged such that magnetic lines of force extend in a radial direction of the magnetic ring.
Optionally, the inner bore of the sleeve portion is disposed through the second end cap;
the mounting column is towards one end of the second end cover exceeds the long bearing, a separation stopping piece is arranged at the exceeding section of the mounting column, and the separation stopping piece is used for limiting the mounting column to move towards the first end cover.
Optionally, the lateral surface that surpasss the section of erection column is equipped with annular mounting groove, the piece that only takes off is including fixing the jump ring in annular mounting groove.
Optionally, the inner wall of the sleeve portion is provided with a step portion;
the mounting column is further sleeved with a top ring which is abutted and arranged between the long bearing and the step part;
the clamp spring is abutted to the top ring.
Optionally, the rotor assembly and the first end cap are connected as a whole through potting.
Optionally, the fit clearance between the long bearing and the mounting post is D1, wherein 0.005mm ≦ D1 ≦ 0.015mm, and/or D1 ≦ 0.01 mm.
Optionally, the stator assembly is fixedly mounted on the sleeve part through interference fit, and the interference between the stator assembly and the sleeve part is D2, wherein D2 is more than or equal to 0.01mm and less than or equal to 0.03mm, and/or D2 is equal to 0.02mm
In the technical scheme of the invention, one end of the long bearing, which is adjacent to the first end cover, extends to a region between the stator assembly and the mounting column, and one end of the long bearing, which is adjacent to the second end cover, extends to the second end cover, so that the sleeve part and the mounting column are stably rotatably mounted, and when the rotor assembly is driven to drive the first end cover to rotate, the jitter and the noise can be reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other related drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic perspective view of an embodiment of an electric machine according to the present invention;
FIG. 2 is a perspective view of the motor of FIG. 1 from another perspective;
FIG. 3 is an exploded perspective view of the motor of FIG. 1;
fig. 4 is a schematic cross-sectional view of the motor of fig. 1.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) | |
| 100 | |
61 | |
|
| 1 | |
7 | |
|
| 2 | |
71 | |
|
| 3 | Long bearing | 8 | |
|
| 4 | |
| Clamp spring | |
| 5 | |
9 | |
|
| 6 | Mounting post |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The present invention provides a motor, which is particularly suitable for a motor rotating at a high speed, such as a micro motor, and fig. 1 to 4 illustrate an embodiment of the motor provided by the present invention, and in particular, in this embodiment, the motor is a micro motor.
Referring to fig. 1 to 4, the motor 100 includes a first end cap 1 and a second end cap 2, a long bearing 3, a stator assembly 4 and a rotor assembly 5, which are oppositely disposed, wherein the first end cap 1 extends toward the second end cap 2 to form a mounting post 6, the second end cap 2 extends toward the second end cap 2 to form a sleeve portion 7, which is sleeved on the periphery of the mounting post 6, a radial gap is reserved between the sleeve portion 7 and the mounting post 6, the long bearing 3 is sleeved on the periphery of the mounting post 6 and is located in the radial gap, the stator assembly 4 is disposed on the periphery of the sleeve portion 7, the rotor assembly 5 is annularly disposed and is sleeved on the periphery of the stator assembly 4, the rotor assembly 5 is fixedly connected to the second end cap 2, wherein one end of the long bearing 3 adjacent to the first end cap 1 extends to a region between the stator assembly 4 and the mounting post 6, the long bearing 3 extends to the second end cap 2 adjacent to one end of the second end cap 2.
In the technical solution of the present invention, one end of the long bearing 3 adjacent to the first end cap 1 extends to a region between the stator assembly 4 and the mounting post 6, and one end of the long bearing 3 adjacent to the second end cap 2 extends to the second end cap 2, so that the sleeve portion 7 and the mounting post 6 are stably rotatably mounted, and when the rotor assembly 5 is driven to drive the first end cap 1 to rotate, the rattling and noise can be reduced.
In the present embodiment, in order to reduce friction between the long bearing 3 and the mounting post 6, the long bearing 3 is an oil-impregnated bearing, preferably, the oil-impregnated bearing is an oil-impregnated copper bearing.
In this embodiment, the rotor assembly 5 includes a magnetic ring, and the magnetic ring is configured such that magnetic lines of force extend along a radial direction of the magnetic ring, so that forces applied to the rotor assembly 5 are distributed along the radial direction, and no component exists in a circumferential direction, thereby further improving rotational stability between the sleeve portion 7 and the mounting post 6, and further reducing jitter and noise.
In this embodiment, the inner hole of the sleeve portion 7 is disposed through the second end cap 2, the mounting post 6 is disposed to protrude beyond the long bearing 3 toward one end of the second end cap 2, and a slip stopper 8 is disposed at an protruding section of the mounting post 6, the slip stopper 8 is configured to limit movement of the mounting post 6 in a direction toward the first end cap 1, and the mounting post 6 is axially fixed by the slip stopper 8, so as to prevent the slip from occurring between the mounting post and the long bearing 3.
The specific embodiment of the anti-slip part 8 is not limited, specifically, in this embodiment, an annular mounting groove 61 is formed in an outer side surface of the protruding section of the mounting column 6, and the anti-slip part 8 includes a snap spring 8a fixed to the annular mounting groove 61. More specifically, a step portion 71 is provided on an inner wall of the sleeve portion 7, a top ring 9 abutting against and disposed between the long bearing 3 and the step portion 71 is further sleeved on the mounting post 6, and the snap spring 8a abuts against and is disposed on the top ring 9 so as to limit the long bearing 3 by disposing the top ring 9.
The rotor assembly 5 is fixedly mounted on the first end cap 1, and a specific fixed connection manner between the rotor assembly 5 and the first end cap 1 is not limited, specifically, in this embodiment, in order to improve the stability of connection between the rotor assembly 5 and the first end cap 1, the rotor assembly 5 and the first end cap 1 are connected into a whole through potting adhesive. After the rotor assembly 5 and the first end cover 1 are assembled, dynamic balance needs to be performed on a dynamic balance instrument, and the dynamic balance amount is adjusted through a material reduction method, so that the unbalance amount of the rotor assembly 5 in the high-speed operation process is controlled within a certain range, and therefore jitter is reduced.
The long bearing 3 and the mounting column 6 are in clearance fit, the fit clearance between the long bearing 3 and the mounting column 6 is D1, D1 is not too large, the rotational stability between the long bearing 3 and the mounting column 6 is lowered if the fit clearance is too large, D1 is not too small, and the manufacturing and assembling difficulty is increased if the fit clearance is too small, so that D1 is not less than 0.005mm and not more than 0.015mm, and preferably D1 is 0.01 mm.
The stator assembly 4 is fixedly mounted on the sleeve portion 7 through interference fit, interference between the stator assembly 4 and the sleeve portion 7 is D2, D2 is not too large, which may cause a large assembling interference force generated when the stator assembly 4 is mounted on the sleeve portion 7, which may cause the stator assembly 4 to deform, especially when the stator assembly 4 includes a main body formed by stacking a plurality of silicon steel sheets, the main body of the stator may be more easily deformed, obviously D2 is not too small, if the D2 is too small, the stator assembly 4 and the sleeve portion 7 are not firmly fixed, so that 0.01mm or more and D2 or less and 0.03mm, preferably, D2 or 0.02mm are not more than 0.03mm
When the motor 100 is manufactured and assembled, the vibration tester is used to perform a frequency sweep test on the motor 100, and find out the resonant frequency of the motor 100 during operation. When the motor 100 is normally used later, the set rotating speed of the motor 100 is intentionally kept away from the inherent resonance point of the motor 100, thereby reducing the vibration of the motor 100 in the high-speed operation process. When the motor 100 is normally used later, the set rotating speed of the motor 100 is intentionally kept away from the inherent resonance point of the motor 100, thereby reducing the vibration of the motor 100 in the high-speed operation process.
When the motor 100 provided by the above embodiment of the invention is at 35000-12000r/min, the corresponding noise value is within 52 decibels.
The above is only a preferred embodiment of the present invention, and it is not intended to limit the scope of the invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall be included in the scope of the present invention.
Claims (7)
1. An electric machine, comprising:
the first end cover and the second end cover are oppositely arranged, the first end cover extends towards the second end cover to form a mounting column, the second end cover extends towards the first end cover to form a sleeve part sleeved on the periphery of the mounting column, and a radial gap is reserved between the sleeve part and the mounting column;
the long bearing is sleeved on the periphery of the mounting column and is positioned in the radial gap;
a stator assembly provided on the outer periphery of the sleeve portion; and the number of the first and second groups,
the rotor assembly is annularly arranged and sleeved on the periphery of the stator assembly, and the rotor assembly is fixedly connected with the first end cover;
wherein an end of the long bearing adjacent the first end cap extends to a region between the stator assembly and the mounting post, and an end of the long bearing adjacent the second end cap extends to the second end cap;
the inner hole of the sleeve part is arranged through the second end cover;
one end, facing the second end cover, of the mounting column is arranged to exceed the long bearing, and a disengagement stopping piece is arranged at an exceeding section of the mounting column and used for limiting the mounting column to move towards the first end cover;
an annular mounting groove is formed in the outer side surface of the exceeding section of the mounting column, and the anti-falling part comprises a clamp spring fixed in the annular mounting groove;
a step part is arranged on the inner wall of the sleeve part;
the mounting column is further sleeved with a top ring which is abutted and arranged between the long bearing and the step part;
the clamp spring is abutted to the top ring.
2. The motor of claim 1 wherein said motor is a micro-electric motor.
3. The electric machine of claim 1 wherein said long bearing is an oil bearing.
4. The motor of claim 1, wherein the rotor assembly comprises a magnetic ring configured such that magnetic lines of force extend radially of the magnetic ring.
5. The motor of claim 1 wherein said rotor assembly is integrally connected to said first end cap by potting.
6. The electric machine of claim 1, wherein the fit clearance between the elongated bearing and the mounting post is D1, wherein 0.005mm ≦ D1 ≦ 0.015mm, and/or wherein D1 ≦ 0.01 mm.
7. The motor of claim 1, wherein the stator assembly is fixedly mounted to the sleeve portion by interference fit and has an interference of D2, wherein D2 0.03mm 0.01mm, and/or D2 0.02 mm.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911298703.6A CN110912329B (en) | 2019-12-13 | 2019-12-13 | Electric machine |
| PCT/CN2019/129083 WO2021114420A1 (en) | 2019-12-13 | 2019-12-27 | Electric motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911298703.6A CN110912329B (en) | 2019-12-13 | 2019-12-13 | Electric machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110912329A CN110912329A (en) | 2020-03-24 |
| CN110912329B true CN110912329B (en) | 2021-08-27 |
Family
ID=69825793
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911298703.6A Active CN110912329B (en) | 2019-12-13 | 2019-12-13 | Electric machine |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN110912329B (en) |
| WO (1) | WO2021114420A1 (en) |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08322186A (en) * | 1995-05-25 | 1996-12-03 | Sony Corp | Motor |
| JP2002044903A (en) * | 2000-07-21 | 2002-02-08 | Minebea Co Ltd | Spindle motor and manufacturing method thereof |
| TW489953U (en) * | 2001-09-07 | 2002-06-01 | Asia Vital Components Co Ltd | Improved structure for bearing retaining device of bearing balls in a DC fan |
| US7267484B2 (en) * | 2003-05-13 | 2007-09-11 | Ntn Corporation | Fluid bearing device |
| KR100533585B1 (en) * | 2004-07-29 | 2005-12-06 | (주)지엔더블유테크놀러지 | A fluid dynamic bearing motor |
| JP4531584B2 (en) * | 2005-02-17 | 2010-08-25 | Ｎｔｎ株式会社 | Fluid dynamic bearing device and motor provided with the same |
| JP2008092612A (en) * | 2006-09-29 | 2008-04-17 | Nippon Densan Corp | Manufacturing method for motor, motor, and recording disk drive |
| JP2008271748A (en) * | 2007-04-24 | 2008-11-06 | Minebea Motor Manufacturing Corp | Radial stepping motor |
| JP2009180294A (en) * | 2008-01-30 | 2009-08-13 | Mitsumi Electric Co Ltd | Dynamic pressure bearing motor |
| CN102025212B (en) * | 2009-09-18 | 2014-03-12 | 德昌电机(深圳)有限公司 | Direct current brushless motor for heating ventilating and air conditioning system |
| JP2012050298A (en) * | 2010-08-30 | 2012-03-08 | Nippon Densan Corp | Spindle motor and disc driving device |
| CN205657532U (en) * | 2016-05-04 | 2016-10-19 | 东莞市银燕电气科技有限公司 | Motor structure and model aeroplane and model ship aircraft that has this structure |
| CN207910570U (en) * | 2018-03-23 | 2018-09-25 | 深圳市东方伺服数控技术有限公司 | A kind of outer rotor servo motor |
| CN209344954U (en) * | 2018-12-04 | 2019-09-03 | 贵州火星探索科技有限公司 | A kind of micro magnetic permanent synchronization motor with position limiting structure |
| CN209375270U (en) * | 2019-01-22 | 2019-09-10 | 前沿驱动（北京）技术有限公司 | A kind of flattening motor, mechanical trunk and robot |
| CN110365182A (en) * | 2019-06-27 | 2019-10-22 | 李峰 | A kind of aviation brushless motor and the space shuttle with it |
-
2019
- 2019-12-13 CN CN201911298703.6A patent/CN110912329B/en active Active
- 2019-12-27 WO PCT/CN2019/129083 patent/WO2021114420A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| WO2021114420A1 (en) | 2021-06-17 |
| CN110912329A (en) | 2020-03-24 |
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