CN114337001A - Miniature motor and stator module thereof - Google Patents
Miniature motor and stator module thereof Download PDFInfo
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- CN114337001A CN114337001A CN202111673467.9A CN202111673467A CN114337001A CN 114337001 A CN114337001 A CN 114337001A CN 202111673467 A CN202111673467 A CN 202111673467A CN 114337001 A CN114337001 A CN 114337001A
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- magnetic shoe
- assembly
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- 230000002093 peripheral effect Effects 0.000 claims abstract description 11
- 230000008878 coupling Effects 0.000 claims description 18
- 238000010168 coupling process Methods 0.000 claims description 18
- 238000005859 coupling reaction Methods 0.000 claims description 18
- 238000001746 injection moulding Methods 0.000 claims description 12
- 239000000853 adhesive Substances 0.000 claims description 4
- 230000001070 adhesive effect Effects 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000006698 induction Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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Abstract
The invention discloses a micro motor and a stator assembly thereof, wherein the stator assembly comprises a connecting frame, a through hole convenient for installing a rotor assembly is formed in the center of the connecting frame, and at least one pair of magnetic shoes are symmetrically and fixedly arranged on the peripheral wall of the connecting frame. The invention connects all the magnetic tiles into a whole by using the connecting frame, and not only when in assembly, the connecting frame fixedly provided with all the magnetic tiles is directly arranged in the shell of the miniature motor, thus realizing the assembly of all the magnetic tiles in one step, and having low assembly difficulty and high assembly efficiency; and the magnetic shoe does not need to be polished, so that the production time of the micro motor is greatly saved, and the production cost of the micro motor is reduced.
Description
Technical Field
The invention belongs to the technical field of motors, and particularly relates to a micro motor and a stator assembly thereof.
Background
The micro motor generally includes a housing, a stator assembly fixedly installed in the housing, and a rotor assembly rotatably connected to the housing at the center of the stator assembly. Because the stator assembly is fixedly arranged on the inner peripheral wall of the shell, in order to facilitate the assembly of the stator assembly, the traditional micro motor is provided with a pair of convex ribs on the inner peripheral wall of the shell, and the magnetic shoe is embedded between the pair of convex ribs; or the convex ribs and/or the U-shaped elastic clamping pieces are used for propping against the edges of two adjacent magnetic tiles so as to fix the magnetic tiles on the inner wall of the machine shell.
The assembling mode of the magnetic shoe has the following defects: the edges of the two arc-shaped sides of the magnetic shoe need to be polished in advance to form a plane which can be abutted against the convex edge or the U-shaped elastic clamping piece, so that the operation is complex, and the polishing operation on the magnetic shoe with a small size is very inconvenient; when the U-shaped elastic clamping piece is adopted to limit the magnetic shoes, the U-shaped elastic clamping piece is a part independent of the shell, and the U-shaped elastic clamping piece needs to be placed between the two magnetic shoes after the magnetic shoes are placed, so that extra measures are needed to be taken to position the magnetic shoes in the process, the U-shaped elastic clamping piece is prevented from not playing a role in positioning the magnetic shoes due to deviation of the placing direction, and the assembling difficulty is high.
The Chinese utility model patent with the application number of CN201521052052.X discloses a guide mechanism convenient for assembling a micro motor, which comprises a hollow body, wherein the body is provided with an arc-shaped top, an outer surface and an inner surface, and the outer surface and the top are of an integral arc-shaped structure; the port part of the inner surface is provided with a step which is matched with the rotor of the micro motor and the upper end part of the magnetic shoe. When the miniature motor is used, the body is fixed at the upper end parts of the rotor and the magnetic shoe of the miniature motor, and then the shell of the miniature motor moves from top to bottom along the body until the shell is assembled outside the rotor and the magnetic shoe.
The guiding mechanism has the following defects: the body can only be positioned with the upper end parts of the rotor and the magnetic shoe of the micro motor, but before the body is assembled in the shell, the rotor and the magnetic shoe are not fixedly assembled, extra equipment is still needed to position the rotor and the magnetic shoe in advance, and then the guide mechanism is utilized to assemble the shell, the rotor and the magnetic shoe.
Disclosure of Invention
The invention aims to provide a micro motor and a stator assembly thereof, wherein the stator assembly of the micro motor connects all magnetic shoes into a whole by using a connecting frame, so that the assembly of all the magnetic shoes can be realized in one step, and the assembly difficulty is low and the assembly efficiency is high.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a stator module of miniature motor is composed of a linking frame with a central through hole for installing rotor module, and at least one pair of magnetic tiles symmetrically fixed to the peripheral wall of said linking frame.
The invention connects all the magnetic tiles into a whole by using the connecting frame, and not only when in assembly, the connecting frame fixedly provided with all the magnetic tiles is directly arranged in the shell of the miniature motor, thus realizing the assembly of all the magnetic tiles in one step, and having low assembly difficulty and high assembly efficiency; and the magnetic shoe does not need to be polished, so that the production time of the micro motor is greatly saved, and the production cost of the micro motor is reduced.
In the stator assembly of the micro motor, a magnetic shoe assembling space is formed on the peripheral wall of the connecting frame, and the magnetic shoe assembling space has the same section with the magnetic shoe. The magnetic shoe assembling space is arranged on the peripheral wall of the connecting frame, so that the magnetic shoe can be rapidly assembled on the connecting frame.
In the stator assembly of the micro motor, the magnetic shoe assembling space penetrates through the connecting frame and is communicated with the through hole. Therefore, the reduction of magnetic induction lines in the through hole due to the existence of the connecting frame can be avoided, and the strength of a magnetic field in the through hole is ensured; and the size of the magnetic shoe assembling space can be fully enlarged on the basis of reducing the volume of the connecting frame as much as possible, so that enough assembling space is reserved for the magnetic shoes.
In the stator assembly of the micro motor, an upper end cover and a lower end cover are formed on the connecting frame at two ends of the magnetic shoe assembling space, and the edges of the upper end cover and the lower end cover are provided with at least one positioning notch. The positioning notch facilitates positioning of the auxiliary stator assembly within the housing when the stator assembly is assembled within the housing of the miniature motor.
Preferably, in the stator assembly of the micro motor, the positioning recesses on the upper end cover and the lower end cover are arranged in pairs, and the projections of the two positioning recesses of the same pair in the vertical direction coincide with each other. This can further improve the positioning efficiency.
Preferably, in the stator assembly of the micro motor, the positioning notch has an inner arc surface, and the outer arc surface of the magnetic shoe is tangent to the inner arc surface.
In the stator assembly of the micro motor, the fixing manner between the magnetic shoe and the coupling frame may be: the connecting frame is integrally formed by injection molding, and the magnetic shoe is integrally connected with the connecting frame in the injection molding process.
Or, the connecting frame is integrally formed by injection molding, and the magnetic shoe is bonded with the connecting frame through adhesive.
Preferably, the magnetic shoe and the connecting frame are connected into a whole in the injection molding process, so that the connection between the magnetic shoe and the connecting frame is firmer.
The invention also provides a connecting frame for the stator assembly of the micro motor, which comprises a frame body, wherein the center of the frame body is provided with a through hole for conveniently mounting the rotor assembly, the peripheral wall of the frame body is provided with a magnetic shoe assembling space, and the magnetic shoe assembling space has the same section with the magnetic shoe.
The invention also provides a micro motor which comprises a shell, wherein the stator assembly of the micro motor is in interference fit in the shell.
In the above-mentioned micro-motor, the casing includes a housing, a first central hole for the central shaft of the rotor assembly to pass through is opened at the end-sealing of the housing, and the opening end of the housing is fastened and fixed with the cover;
the shell is internally provided with a first positioning convex rib matched with the positioning notch on the lower end cover, and the machine cover is provided with a second positioning convex rib matched with the positioning notch on the upper end cover.
The first positioning convex edge and the positioning notch are utilized to realize the assembly positioning of the stator assembly and the shell, and the second positioning convex edge and the positioning notch are utilized to realize the assembly positioning of the shell, the stator assembly and the cover, so that the assembly efficiency of the stator assembly and the shell is further improved.
Compared with the prior art, the invention has the beneficial effects that:
(1) the invention connects all the magnetic tiles into a whole by using the connecting frame, and not only when in assembly, the connecting frame fixedly provided with all the magnetic tiles is directly arranged in the shell of the miniature motor, thus realizing the assembly of all the magnetic tiles in one step, and having low assembly difficulty and high efficiency; and the magnetic shoe does not need to be polished, so that the production time of the micro motor is greatly saved, and the production cost of the micro motor is reduced.
(2) In the invention, the fixing connection mode between the magnetic shoe and the connecting frame can be as follows: the connecting frame is integrally formed by injection molding, and the magnetic shoe is integrally connected with the connecting frame in the injection molding process; or the magnetic shoe and the injection-molded connecting frame are bonded through adhesive. Preferably, the magnetic shoe and the connecting frame are connected into a whole in the injection molding process, so that the connection between the magnetic shoe and the connecting frame is firmer.
(3) In the invention, the magnetic shoe is fixedly arranged in a magnetic shoe assembling space on the outer peripheral wall of the connecting frame, and the magnetic shoe assembling space has the same section as the magnetic shoe; the magnetic shoe assembling space penetrates through the connecting frame and is communicated with the through hole, so that the reduction of magnetic induction lines in the through hole due to the existence of the connecting frame can be avoided, and the magnetic field strength in the through hole is ensured; and the size of the magnetic shoe assembling space can be fully enlarged on the basis of reducing the volume of the connecting frame as much as possible, so that enough assembling space is reserved for the magnetic shoes.
(4) In the invention, the edges of the upper end cover and the lower end cover are provided with at least one positioning notch; a first positioning convex rib matched with the positioning notch on the lower end cover is arranged in the shell, and a second positioning convex rib matched with the positioning notch on the upper end cover is arranged on the machine cover; the first positioning convex edge and the positioning notch are utilized to realize the assembly positioning of the stator assembly and the shell, and the second positioning convex edge and the positioning notch are utilized to realize the assembly positioning of the shell, the stator assembly and the cover, so that the assembly efficiency of the stator assembly and the shell is further improved.
Drawings
FIG. 1 is a schematic structural diagram of a stator assembly of a micro-motor according to the present invention;
FIG. 2 is a schematic view of another structure of a stator assembly of the miniature motor according to the present invention;
FIG. 3 is a schematic view of a stator assembly of another form of the miniature motor of the present invention;
FIG. 4 is a schematic structural diagram of a micro-motor according to the present invention;
fig. 5 is a sectional view taken along line a-a in fig. 4.
Detailed Description
The technical solution of the present invention will be further described in detail with reference to the accompanying drawings and the detailed description.
Example 1
As shown in fig. 1, 2 and 3, the stator assembly of the micro motor of the present embodiment includes a coupling frame 1, a through hole 11 is formed in the center of the coupling frame 1 for facilitating installation of the rotor assembly, at least one pair of magnetic tiles 2 are symmetrically and fixedly disposed on the peripheral wall of the coupling frame 1, and the coupling frame 1 is used to couple the magnetic tiles 2 into a whole.
The outer contour shape of the coupling frame 1 and the number of pairs of the magnetic shoes 2 are determined by the shape of the housing 10 of the micro-motor. As shown in fig. 1 and 5, when the cross section of the coupling frame 1 is flat like the casing 10, only one pair of magnetic tiles 2 are provided; when the cross section of the connecting frame 1 is in a perfect circle similar to the casing 10, one pair, two pairs (as shown in fig. 3) and more pairs of magnetic tiles 2 can be arranged; the embodiment has no specific requirement on the number of pairs of the magnetic shoes 2, and the actual requirement of the micro motor is taken as the standard.
As shown in fig. 1, 2 and 3, a magnetic shoe assembling space 12 is formed on the outer peripheral wall of the coupling frame 1, and the magnetic shoe assembling space 12 has the same section as the magnetic shoe 2, i.e. the magnetic shoe assembling space 12 is completely matched with the magnetic shoe 2; the inner side walls of the magnetic shoe 2 and the magnetic shoe assembling space 12 are not provided with other fixing measures except mutual connection/adhesion. Therefore, the coupling frame 1 is integrally injection molded, and the magnetic shoe 2 is pre-placed in the mold during the injection molding process, and is integrally connected with the coupling frame 1 during the injection molding process.
In addition, the connecting frame 1 can be integrally injection-molded, and then the magnetic tiles 2 are bonded to the magnetic tile assembly spaces 12 of the connecting frame 1 through adhesive.
As shown in fig. 1, in the present embodiment, each magnetic shoe assembling space 12 is disposed through the coupling frame 1 and is communicated with a through hole 11 in the center of the coupling frame 1; therefore, the reduction of magnetic induction lines in the through hole 11 caused by the existence of the connecting frame 1 can be avoided, and the strength of a magnetic field in the through hole 11 is ensured; moreover, the size of the magnetic shoe assembling space 12 can be fully enlarged on the basis of reducing the volume of the connecting frame 1 as much as possible, and enough assembling space is reserved for the magnetic shoe 2.
As shown in fig. 1, in order to realize the positioning of the stator assembly and the casing 10 when the stator assembly is assembled into the casing 10 of the micro motor, the coupling frame 1 of the present embodiment is formed with an upper end cap 13 and a lower end cap 14 at both ends of the magnetic shoe assembling space 12, and the edges of the upper end cap 13 and the lower end cap 14 are provided with a positioning notch 15, and the number of the positioning notches 15 can be adjusted according to actual needs.
As shown in fig. 1, 2 and 3, in the present embodiment, the positioning recesses 15 on the upper end cover 13 and the lower end cover 14 are arranged in pairs, and the projections of the two positioning recesses 15 of the same pair in the vertical direction coincide, so that the positioning efficiency can be further improved. In this embodiment, each positioning notch 15 has an inner arc surface 15a, and the outer arc surface of the magnetic shoe 2 is tangent to the inner arc surface 15 a. In this way, during the injection molding connection of the magnetic shoe 2 and the connecting frame 1, the mold structure forming the positioning notch 15 and the mold structure forming the through hole 11 are fixed in the mold in a manner of clamping the magnetic shoe 2 back and forth.
Example 2
As shown in fig. 4 and 5, the present embodiment is a micro motor, which includes a casing 10, a micro motor stator assembly 20 similar to that of embodiment 1 is fitted into the casing 10 by interference fit, and the magnetic shoes of the stator assembly are not shown in fig. 4 and 5.
In this embodiment, the casing 10 includes a casing 101, a first central hole 102 is formed at a closed end of the casing 101 for a central shaft of a rotor assembly (not shown) to pass through, an open end of the casing 101 is fastened and fixed with a cover 103, and a second central hole 104 is formed on the cover 103 for a central shaft of the rotor assembly to pass through.
The stator assembly is installed in the housing 101 in an interference fit manner, the inner side wall of the end cover of the housing 101 is provided with a first positioning rib 105 matched with the positioning notch 15 on the lower end cover 14, and the side of the cover 103 facing the housing 101 is provided with a second positioning rib 106 matched with the positioning notch 15 on the upper end cover 13.
The first positioning rib 105 and the positioning notch 15 are used for realizing the assembly positioning of the stator assembly and the shell 101, and the second positioning rib 106 and the positioning notch 15 are used for realizing the assembly positioning of the shell 101, the stator assembly and the cover 103, so that the assembly efficiency of the stator assembly and the machine shell 10 is further improved.
Claims (10)
1. The stator assembly of the micro motor is characterized by comprising a connecting frame (1), wherein a through hole (11) facilitating installation of a rotor assembly is formed in the center of the connecting frame (1), and at least one pair of magnetic tiles (2) are symmetrically and fixedly arranged on the peripheral wall of the connecting frame (1).
2. The stator assembly of a micro-motor according to claim 1, wherein the outer circumferential wall of the coupling frame (1) is formed with a magnetic shoe assembly space (12), and the magnetic shoe assembly space (12) has the same section as the magnetic shoe (2).
3. The stator assembly of a micro-motor according to claim 2, wherein the magnetic shoe assembly space (12) penetrates the coupling frame (1) and is communicated with the through hole (11).
4. The stator assembly of a micro-motor according to claim 2, wherein an upper cap (13) and a lower cap (14) are formed on the coupling frame (1) at both ends of the magnetic shoe assembly space (12), and edges of the upper cap (13) and the lower cap (14) are provided with at least one positioning recess (15).
5. The stator assembly of the micro-motor as claimed in claim 4, wherein the positioning recesses (15) of the upper end cover (13) and the lower end cover (14) are arranged in pairs, and the projections of the two positioning recesses (15) of the same pair in the vertical direction coincide.
6. The stator assembly of the micro-motor as claimed in claim 4, wherein the positioning recess (15) has an inner arc surface (15a), and the outer arc surface of the magnetic shoe (2) is tangential to the inner arc surface (15 a).
7. The stator assembly of a micro-motor according to any one of claims 1 to 6, wherein the coupling frame (1) is integrally injection molded, and the magnetic shoe (2) is integrally coupled with the coupling frame (1) during injection molding;
or, the connecting frame (1) is integrally formed by injection molding, and the magnetic shoe (2) is bonded with the connecting frame (1) through adhesive.
8. The utility model provides a link frame for micro motor stator module, characterized by, includes the support body, the center of support body be formed with through-hole (11) convenient to installation rotor subassembly, be formed with magnetic shoe assembly space (12) on the perisporium of this support body, this magnetic shoe assembly space (12) have with magnetic shoe (2) the same section.
9. A micromotor characterized in that it comprises a casing (10), said casing (10) having a stator assembly of a micromotor according to any one of claims 1 to 8 fitted therein by interference.
10. The micro-motor according to claim 9, wherein the housing (10) comprises a housing (101), a first central hole (102) for passing a central shaft of the rotor assembly is formed in a closed end of the housing (101), and an open end of the housing (101) is fastened and fixed with a cover (103);
the inner side of the shell (101) is provided with a first positioning convex rib (105) matched with the positioning notch (15) on the lower end cover (14), and the cover (103) is provided with a second positioning convex rib (106) matched with the positioning notch (15) on the upper end cover (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111673467.9A CN114337001A (en) | 2021-12-31 | 2021-12-31 | Miniature motor and stator module thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111673467.9A CN114337001A (en) | 2021-12-31 | 2021-12-31 | Miniature motor and stator module thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114337001A true CN114337001A (en) | 2022-04-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111673467.9A Pending CN114337001A (en) | 2021-12-31 | 2021-12-31 | Miniature motor and stator module thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114337001A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202535171U (en) * | 2012-01-10 | 2012-11-14 | 宁波市华宝塑胶模具有限公司 | Motor stator support having magnetic shoe isolating bush |
| CN203911606U (en) * | 2014-06-26 | 2014-10-29 | 浙江金达电机电器有限公司 | Magnetic shoe fixing support |
| CN104218709A (en) * | 2014-09-17 | 2014-12-17 | 湖州德盛汽车部件有限公司 | Easy installation motor magnetic tile fixed structure |
| CN208001192U (en) * | 2018-04-08 | 2018-10-23 | 重庆奥兴嘉科技有限公司 | A kind of ABS motors |
| CN109660051A (en) * | 2018-12-14 | 2019-04-19 | 尼得科电机（青岛）有限公司 | Stator module and its manufacturing method and motor including the stator module |
| CN214626527U (en) * | 2021-04-18 | 2021-11-05 | 金华艺博科技有限公司 | Permanent magnet motor with integral injection molding type stator radial ring |
-
2021
- 2021-12-31 CN CN202111673467.9A patent/CN114337001A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202535171U (en) * | 2012-01-10 | 2012-11-14 | 宁波市华宝塑胶模具有限公司 | Motor stator support having magnetic shoe isolating bush |
| CN203911606U (en) * | 2014-06-26 | 2014-10-29 | 浙江金达电机电器有限公司 | Magnetic shoe fixing support |
| CN104218709A (en) * | 2014-09-17 | 2014-12-17 | 湖州德盛汽车部件有限公司 | Easy installation motor magnetic tile fixed structure |
| CN208001192U (en) * | 2018-04-08 | 2018-10-23 | 重庆奥兴嘉科技有限公司 | A kind of ABS motors |
| CN109660051A (en) * | 2018-12-14 | 2019-04-19 | 尼得科电机（青岛）有限公司 | Stator module and its manufacturing method and motor including the stator module |
| CN214626527U (en) * | 2021-04-18 | 2021-11-05 | 金华艺博科技有限公司 | Permanent magnet motor with integral injection molding type stator radial ring |
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Application publication date: 20220412 |