CN217692993U - Miniature external rotor motor - Google Patents
Miniature external rotor motor Download PDFInfo
- Publication number
- CN217692993U CN217692993U CN202220306917.4U CN202220306917U CN217692993U CN 217692993 U CN217692993 U CN 217692993U CN 202220306917 U CN202220306917 U CN 202220306917U CN 217692993 U CN217692993 U CN 217692993U
- Authority
- CN
- China
- Prior art keywords
- circuit board
- fixing
- motor
- fixed
- stator core
- 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.)
- Withdrawn - After Issue
Links
Images
Landscapes
- Motor Or Generator Frames (AREA)
Abstract
The utility model discloses a miniature external rotor electric machine includes: a rotor assembly and a stator assembly; the stator assembly includes: the motor support comprises a fixing part and a columnar part, and a stator core, a winding and a circuit board are arranged on the columnar part; the rotor assembly includes: a rotor shaft and a motor housing; the rotor shaft passes through the columnar part and is exposed out of the fixed part, and the motor shell is covered on the periphery of the stator core and the winding; and one side of the fixing part facing the stator core is provided with fixing teeth, the circuit board is provided with a notch, and the fixing teeth are inserted into the notch to fix the circuit board on the fixing part. The utility model discloses be provided with fixed tooth on the fixed part and be used for supplementary fixed circuit board, the circuit board passes through fixed tooth and stable the fixing on the fixed part, opening on the circuit board and the bayonet cooperation of fixed tooth increase the frictional force between fixed part and the circuit board, avoid the circuit board to break away from the fixed part, increase motor structure's stability.
Description
Technical Field
The utility model relates to an external rotor electric machine technical field especially relates to a miniature external rotor electric machine.
Background
The motor housing and the rotor shaft of the outer rotor motor are mutually fixed, the motor stator part is arranged in the motor housing to drive the motor housing to rotate, and compared with the inner rotor motor, the outer rotor motor has the advantages of larger rotational inertia and torque, convenience in maintenance, good heat dissipation performance and the like. Because the fixed problem of circuit board, can't reduce external rotor electric machine's volume, the utility model discloses the technical problem that will solve is mainly, in traditional external rotor electric machine assembling process, because the volume of motor reduces (mainly being the reduction of motor size), fix the circuit board that is used for controlling motor switching and rotational speed on the motor and the contact surface between the fixed position reduces, therefore the holding power reduces, adopt traditional assembled mode to cause the circuit board to move about in the motor easily, in case the circuit board damages because of touching rotor part, the user just needs to change the circuit board, the result of use is poor, the maintenance is frequent.
SUMMERY OF THE UTILITY MODEL
In order to solve the fixed unstability of circuit board among the small-size external rotor electric machine among the prior art, break away from fixed and the problem of damage easily, the utility model provides an increase circuit board fixed stability's miniature external rotor electric machine.
The utility model discloses a following technical scheme realizes:
a miniature external rotor electric machine comprising: a rotor assembly and a stator assembly; the stator assembly includes: the motor support comprises a fixed part and a columnar part, wherein a stator core, a winding arranged on the stator core and a circuit board electrically connected with the winding and an external circuit respectively are arranged on the columnar part; the rotor assembly includes: the motor comprises a rotor shaft and a motor shell fixed at one end of the rotor shaft;
the rotor shaft penetrates through the columnar part and is exposed out of the fixing part, and the motor shell is covered on the periphery of the stator core and the winding;
and one side of the fixing part facing the stator core is provided with fixing teeth, the circuit board is provided with a notch, and the fixing teeth are inserted into the notch to fix the circuit board on the fixing part.
Furthermore, the fixing portion is provided with a mounting hole, the circuit board is provided with a plate hole, and the fixing teeth are inserted into the notch to enable the mounting hole to be aligned with the plate hole.
Furthermore, the fixing portion with all be provided with the screw on the circuit board, the screw passes the circuit board with the fixing portion will the circuit board is fixed on the fixing portion.
Furthermore, one side of the fixing portion, which faces the stator core, is provided with a glue groove, glue is stored in the glue groove, and the circuit board is fixed on the fixing portion through glue adhesion.
Further, the fixed teeth comprise first fixed teeth and second fixed teeth, the shapes of the first fixed teeth and the second fixed teeth are different, and the gaps are respectively mounted on the fixing portions in an abutting mode against side walls of the first fixed teeth and the second fixed teeth.
Further, a fixing protrusion is arranged on the outer wall of the columnar portion, a positioning groove is arranged on the inner wall of the stator core, and the fixing protrusion is inserted into the positioning groove, so that the stator core is fixed relative to the columnar portion.
Further, a bearing chamber is installed on the fixing portion, a bearing is installed in the bearing chamber, and the rotor shaft penetrates through the columnar portion and the bearing to be installed in the motor support.
Furthermore, the rotor shaft comprises a clamping groove, the rotor shaft comprises a clamp spring, and the clamp spring is fixed in the clamping groove and abuts against the bearing.
Further, a buffer gasket is arranged on the rotor assembly, and sleeved on the rotor shaft and arranged between the fixing part and the motor shell.
The beneficial effects of the utility model reside in that:
the utility model discloses be provided with fixed tooth on the fixed part and be used for supplementary fixed circuit board, no matter be fixed through the screw fixation or bond fixedly, the circuit board all can pass through fixed tooth and stable the fixing on the fixed part, opening and the bayonet cooperation of fixed tooth on the circuit board increase the frictional force between fixed part and the circuit board, avoid the circuit board to break away from the fixed part, increase motor structure's stability.
Drawings
Fig. 1 is a schematic perspective view of the present invention;
fig. 2 is a schematic view of an exploded structure of a stator assembly of the present invention;
fig. 3 is a schematic structural view of the motor bracket of the present invention;
fig. 4 is a schematic perspective view of the rotor assembly of the present invention.
Detailed Description
In order to make the objects, technical solutions and effects of the present invention clearer and clearer, the following description of the present invention will refer to the accompanying drawings and illustrate embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
Referring to fig. 1 to 4, the present invention discloses a micro external rotor motor, including: a rotor assembly 2 and a stator assembly 1; the stator assembly 1 includes: the motor support 11 comprises a fixing portion 111 and a columnar portion 112, wherein a stator core 12, a winding 121 installed on the stator core 12, and a circuit board 13 respectively electrically connected with the winding 121 and an external circuit are arranged on the columnar portion 112.
The cross-section of the motor bracket 11 is T-shaped, the column portion 112 is a cylinder with a through hole inside, the fixing portion 111 is a plate-shaped device arranged at one end of the column portion 112, the stator core 12 is installed outside the column portion 112, and the rotor shaft 21 in the rotor assembly 2 is installed in the through hole in the column portion 112. The stator core 12 is provided with a plurality of sheet-like teeth on which a wire is wound to form the winding 121. The circuit board 13 is electrically connected with the winding 121, and an external circuit supplies power to the winding 121 through the circuit board 13. Be provided with electric current size and the break-make that a plurality of components and parts let in being used for controlling winding 121 on circuit board 13, play the effect of control motor rotational speed and switching, the constitution and the control principle of circuit board 13, technical staff in the field can realize through prior art, the utility model discloses main problem of concentrating lies in how control circuit board 13, therefore does not give unnecessary details to circuit board 13 control motor principle.
The rotor assembly 2 includes: a rotor shaft 21 and a motor housing 22 fixed at one end of the rotor shaft 21. As described above, the rotor shaft 21 passes through the columnar portion 112 and is exposed to the fixing portion 111, and the motor housing 22 is covered on the outer periphery of the stator core 12 and the winding 121.
The winding 121 is internally communicated with regularly-changed current to enable the teeth on the stator core 12 to generate an induction magnetic field, and the inner wall of the motor shell 22 is provided with a magnet which drives the motor shell 22 and the rotor shaft 21 to rotate under the drive of the induction magnetic field.
The fixing portion 111 has fixing teeth 111a on a side facing the stator core 12, the circuit board 13 has a slit 131, and the fixing teeth 111a are inserted into the slit 131 to fix the circuit board 13 to the fixing portion 111. During the process of mounting the fixing teeth 111a and the slits 131, a friction force is generated between the circuit board 13 and the fixing portion 111, so as to increase a holding force between the fixing portion 111 and the circuit board 13, and stabilize the circuit board 13 to prevent the circuit board 13 from rotating relative to the fixing portion 111.
In an embodiment of the present invention, the fixing portion 111 is provided with a mounting hole 111b, the circuit board 13 is provided with a plate hole 132, and the fixing teeth 111a are inserted into the notch 131, so that the mounting hole 111b is aligned with the plate hole 132. The notch 131 functions to position the circuit board 13 on the fixing portion 111.
In an embodiment of the present invention, the fixing portion 111 and the circuit board 13 are provided with screw holes 133, and screws pass through the circuit board 13 and the fixing portion 111 fixes the circuit board 13 on the fixing portion 111. The circuit board 13 is mounted on the fixing portion 111 in a screw fixing manner, and in order to increase the fixing stability, screws are inserted into the fixing portion 111 from the surface of the circuit board 13; external screw fixation the motor, during, follow fixed part 111 inserts on the circuit board 13.
In an embodiment of the present invention, the fixing portion 111 is provided with a glue groove 111c towards one side of the stator core 12, the glue solution is stored in the glue groove 111c, and the circuit board 13 is fixed on the fixing portion 111 through the glue solution. The circuit board 13 is fixed to the fixing portion 111 by bonding.
For preventing circuit board 13 mounted position mistake, the utility model discloses be provided with and prevent slow-witted structure, specifically do: the fixing teeth 111a include first fixing teeth 111a and second fixing teeth 111a, shapes of the first fixing teeth 111a and the second fixing teeth 111a are different, and the slits 131 are mounted on the fixing portion 111 against sidewalls of the first fixing teeth 111a and the second fixing teeth 111a, respectively. If the circuit board 13 is erroneously mounted on the fixing portion 111, the first fixing teeth 111a or the second fixing teeth 111a cannot be inserted into the non-conforming notches 131, and the user needs to adjust to the correct mounting position to fix the circuit board 13, thereby achieving the foolproof effect.
In the above embodiment, the stator core 12 is easily rotated relative to the column portion 112 by the reaction force of the magnet on the inner wall of the motor housing 22, which affects the normal operation of the motor, in order to ensure that the column portion 112 and the stator core 12 are fixed to each other, a fixing protrusion 112a is disposed on the outer wall of the column portion 112, a positioning groove 122 is disposed on the inner wall of the stator core 12, and the fixing protrusion 112a is inserted into the positioning groove 122, so that the stator core 12 is fixed relative to the column portion 112, and the stator core 12 is prevented from rotating relative to the column portion 112.
The fixing portion 111 is provided with a bearing chamber 111d, a bearing is installed in the bearing chamber 111d, and the rotor shaft 21 passes through the columnar portion 112 and the bearing is installed in the motor bracket 11.
The rotor shaft 21 comprises a clamping groove 211, the rotor shaft 21 comprises a clamp spring 212, and the clamp spring 212 is fixed in the clamping groove 211 and abuts against the bearing.
The rotor assembly 2 is provided with a buffer washer 23, and the buffer washer 23 is sleeved on the rotor shaft 21 and is arranged between the fixing part 111 and the motor housing 22.
The utility model discloses be provided with fixed tooth 111a on fixed part 111 and be used for supplementary fixed circuit board 13, no matter be fixed through the screw fixation or bond fixedly, circuit board 13 all can pass through fixed tooth 111a and stable the fixing on fixed part 111, opening 131 on the circuit board 13 and the bayonet cooperation of fixed tooth 111a increase the frictional force between fixed part 111 and the circuit board 13, avoid circuit board 13 to break away from fixed part 111, increase the stability of motor structure.
It is to be understood that the invention is not limited to the above-described embodiments, and that modifications and variations may be made by those skilled in the art in light of the above teachings, and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (9)
1. A miniature external rotor motor, characterized by comprising: a rotor assembly and a stator assembly; the stator assembly includes: the motor support comprises a fixed part and a columnar part, wherein a stator core, a winding arranged on the stator core and a circuit board electrically connected with the winding and an external circuit respectively are arranged on the columnar part; the rotor assembly includes: the motor comprises a rotor shaft and a motor shell fixed at one end of the rotor shaft;
the rotor shaft penetrates through the columnar part and is exposed out of the fixing part, and the motor shell is covered on the periphery of the stator core and the winding;
and one side of the fixing part facing the stator core is provided with fixing teeth, the circuit board is provided with a gap, and the fixing teeth are inserted into the gap to fix the circuit board on the fixing part.
2. The miniature external rotor electric machine according to claim 1, wherein the fixing portion is provided with a mounting hole, the circuit board is provided with a plate hole, and the fixing teeth are inserted into the slits so that the mounting hole is aligned with the plate hole.
3. The miniature external rotor motor according to claim 1, wherein the fixing portion and the circuit board are provided with screw holes, and screws are inserted through the circuit board and the fixing portion to fix the circuit board to the fixing portion.
4. The miniature external rotor motor according to claim 1, wherein a glue groove is formed in a side of the fixing portion facing the stator core, glue is stored in the glue groove, and the circuit board is fixed to the fixing portion by gluing with the glue.
5. The miniature external rotor motor according to claim 1, wherein the stationary teeth comprise first stationary teeth and second stationary teeth, the first stationary teeth and the second stationary teeth have different shapes, and the slits are respectively mounted on the fixing portions against sidewalls of the first stationary teeth and the second stationary teeth.
6. The miniature external rotor motor according to claim 1, wherein a fixing protrusion is provided on an outer wall of the columnar portion, and a positioning groove is provided on an inner wall of the stator core, and the fixing protrusion is inserted into the positioning groove to fix the stator core with respect to the columnar portion.
7. The miniature external rotor electric machine according to claim 1, wherein a bearing chamber is mounted on the fixing portion, a bearing is mounted in the bearing chamber, and the rotor shaft is mounted in the motor bracket through the cylindrical portion and the bearing.
8. The miniature external rotor motor according to claim 7, wherein the rotor shaft comprises a snap groove, and the rotor shaft comprises a snap spring, and the snap spring is fixed in the snap groove and abuts against a bearing.
9. The miniature external rotor electric machine of claim 1, wherein a cushion washer is mounted on the rotor assembly, the cushion washer being captured on the rotor shaft and disposed between the stationary portion and the motor housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220306917.4U CN217692993U (en) | 2022-02-16 | 2022-02-16 | Miniature external rotor motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220306917.4U CN217692993U (en) | 2022-02-16 | 2022-02-16 | Miniature external rotor motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217692993U true CN217692993U (en) | 2022-10-28 |
Family
ID=83729223
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220306917.4U Withdrawn - After Issue CN217692993U (en) | 2022-02-16 | 2022-02-16 | Miniature external rotor motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217692993U (en) |
-
2022
- 2022-02-16 CN CN202220306917.4U patent/CN217692993U/en not_active Withdrawn - After Issue
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH11146617A (en) | Brushless dc motor structure | |
| CN108730209B (en) | Electric blower and electric dust collector mounted with the same | |
| CN214679079U (en) | Simple driving mechanism, electric toothbrush handle and electric toothbrush | |
| JPH01110044A (en) | Disc type single phase brushless motor | |
| CN217692993U (en) | Miniature external rotor motor | |
| CN111981060B (en) | Electromagnetic power-off brake with high reliability | |
| KR20030077206A (en) | Stepping motor | |
| CN216699696U (en) | External rotor direct current brushless motor convenient to heat dissipation | |
| CN214380350U (en) | Permanent magnet synchronous motor and rotor assembly | |
| US20030107274A1 (en) | Stepping motor | |
| JPH0744816B2 (en) | Brushless motor | |
| KR20110010231A (en) | Spindle motor | |
| JP5250069B2 (en) | Motor and blower fan | |
| JP2021027713A (en) | Rotor, motor, and brushless wiper motor | |
| CN218449642U (en) | Low-voltage direct-current speed-regulating mute brushless motor | |
| JPH1127917A (en) | Motor structure | |
| JP3041034U (en) | Laminated core inner rotor type rotating electric machine | |
| JP3214913B2 (en) | Radial type outer rotor type brushless motor | |
| CN215009795U (en) | External rotor motor | |
| JP2596840B2 (en) | DC brushless motor | |
| JP2000037059A (en) | Dc rotary electric machine | |
| CN216016644U (en) | Brushless motor structure | |
| CN217469724U (en) | Miniature brushless motor device | |
| JP2530575Y2 (en) | Floppy disk drive motor | |
| JP2001128403A (en) | Method of manufacturing small-sized motor and rotor of the motor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20221028 Effective date of abandoning: 20230705 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20221028 Effective date of abandoning: 20230705 |