CN216056514U - Magnetic steel structure of hollow cup type brush motor and motor stator with same - Google Patents
Magnetic steel structure of hollow cup type brush motor and motor stator with same Download PDFInfo
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- CN216056514U CN216056514U CN202122136396.0U CN202122136396U CN216056514U CN 216056514 U CN216056514 U CN 216056514U CN 202122136396 U CN202122136396 U CN 202122136396U CN 216056514 U CN216056514 U CN 216056514U
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Abstract
The utility model discloses a magnetic steel structure of a hollow cup type brush motor and a motor stator with the structure, wherein the magnetic steel structure comprises a magnetic yoke, the surface of the magnetic yoke is symmetrically provided with N pairs of magnets, N is less than or equal to 2, the magnets have magnetism, the top surfaces of each pair of magnets are respectively a south pole and a north pole, and mounting holes are formed in the magnetic yoke; and the casing then adopts the integrated into one piece mode, and separately produces with traditional shell and bottom surface and assembles again and compare, has reduced production processes, and the casing is overall structure more firm, and the magnet steel structure is installed on column portion, and is more stable.
Description
Technical Field
The utility model relates to the technical field of motors, in particular to a magnetic steel structure of a hollow cup type brush motor and a motor stator with the structure.
Background
The hollow cup type brush motor is gradually applied to the fields of electric tools, household appliances and security protection, and the cost requirement of customers on the motor is higher and higher. At present, a stator assembly of a coreless brush coreless motor in the market adopts a CNC (computer numerical control) shell, a CNC front end cover, a bearing and hollow cylindrical sintered neodymium iron boron magnetic steel, wherein a large cylindrical structure needs to be firstly cut into a square material during production of the magnetic steel, then a small cylindrical material is obtained through cylindrical grinding, a grinding part becomes waste, then a hole is drilled in the center of the obtained small cylindrical material to obtain a hollow cylindrical structure, a part removed by the drilling becomes waste, and a large amount of rare earth neodymium iron boron is wasted due to twice processing; in addition, the excircle is ground, drilled or drawn and processed, the process complexity is high, the processing cost is higher; and the magnetic steel is cylindrically drilled or drilled, and the annular wall is stressed by processing stress, so that the hidden crack failure risk exists.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention provides a more economical magnetic steel structure and a motor stator assembly with the magnetic steel structure.
The technical scheme is as follows: one of the objects of the utility model is achieved by:
the utility model provides a hollow cup formula has magnet steel structure of brush motor which the key lies in: the magnetic yoke is characterized by comprising a magnetic yoke, wherein N pairs of magnets are symmetrically arranged on the surface of the magnetic yoke, N is less than or equal to 2, the magnets are magnetic, each pair of magnets are provided with a south pole and a north pole on the top surface respectively, and mounting holes are formed in the magnetic yoke. Adopt above-mentioned technical scheme, the magnet steel structure becomes by traditional whole hollow circular cylinder and comprises yoke and magnet two parts, and the magnet has magnetism, and the yoke as long as the magnetic conduction can, the yoke part can directly be stacked the shaping, compares with traditional structure and has greatly reduced the use and the waste of tombarthite, has reduced manufacturing cost by a wide margin, has avoided the magnetism part to draw out the inefficacy risk that the hole brought simultaneously, and the reliability of magnet steel structure is higher.
Further, the air conditioner is provided with a fan,
the cross section of the magnet is steamed bread-shaped, the lower part of the magnet is square-shaped, at least one part of the magnet is embedded on the magnet yoke, and the top surface of the magnet is arc-surface-shaped. By adopting the structure, the magnet can be ensured to have certain width and certain thickness, and the magnet is ensured to have enough magnetic flux.
The magnetic yoke is cylindrical, the mounting hole is formed in the center of the magnetic yoke, and the center line of the arc surface of the top surface of the magnet coincides with the center line of the magnetic yoke. By adopting the structure, the magnetic steel structure has stable magnetism.
The radius of the arc surface of the top surface of the magnet is larger than that of the magnetic yoke. By adopting the structure, the volume of the magnetic yoke is smaller, and the material is saved.
M process holes are formed in the inner wall of the magnetic yoke around the mounting hole, M is a natural number, and the process holes are communicated with the mounting hole. By adopting the structure, the magnetic steel can be injected with glue in the technical hole after being installed, so that the magnetic steel can be fixed more stably.
The above-mentioned N is 1.
The second purpose of the utility model is realized by the following steps:
the utility model provides a hollow cup formula has brush motor stator which the key lies in: the magnetic steel structure comprises the magnetic steel structure and further comprises an integrally formed machine shell which comprises a cylindrical shell, wherein the bottom surface is formed at one end of the shell in a stamping mode, a bearing chamber is formed at one part of the bottom surface towards the inside of the shell in a stamping mode, a columnar portion is formed at one part of the bottom of the bearing chamber towards the inside of the shell in a stretching mode, and the magnetic steel structure is installed on the columnar portion through the installation hole. Adopt above-mentioned technical scheme, whole stator structure's magnet steel is compared with the tradition, has reduced rare earth's use and waste, has greatly reduced manufacturing cost, and the reliability of magnet steel is higher, and the casing then adopts the integrated into one piece mode, and separately produces with traditional shell and bottom surface and reassemble and compare, has reduced production processes, and magnet steel structrual installation is on column portion, and is stable firm.
Preferably, the first and second electrodes are formed of a metal,
the length of the columnar part is more than or equal to 5 mm. By adopting the structure, the magnetic steel structure is more stably installed.
And a bearing is arranged in the bearing chamber.
Compared with the prior art, the utility model has the beneficial effects that: compared with the traditional magnetic steel of the whole stator structure, the use and waste of rare earth metal are reduced, the production cost is greatly reduced, meanwhile, the failure risk caused by hole digging of a magnetic part is avoided, and the reliability of the magnetic steel is higher; and the casing then adopts the integrated into one piece mode, and separately produces with traditional shell and bottom surface and assembles again and compare, has reduced production processes, and the casing is overall structure more firm, and the magnet steel structure is installed on column portion, and is more stable.
Drawings
FIG. 1 is a schematic perspective view of a magnetic steel structure;
FIG. 2 is a schematic plan view of a magnetic steel structure;
FIG. 3 is a perspective view of a stator assembly;
FIG. 4 is a plan view of a stator assembly;
fig. 5 is a sectional view a-a of fig. 4.
Detailed Description
The present invention will be further described with reference to the following examples and the accompanying drawings.
Embodiment 1, as shown in fig. 1 and 2, a magnetic steel structure of a hollow cup type brush motor includes a magnetic yoke 101, where N pairs of magnets 102 are symmetrically disposed on a surface of the magnetic yoke 101, N is less than or equal to 2, the magnets 102 have magnetism, a top surface of each pair of magnets 102 is a south pole and a north pole, respectively, and a mounting hole 103 is formed in the magnetic yoke 101.
The cross section of the magnet 102 is steamed bread-shaped, the lower part of the magnet is square-shaped, at least one part of the magnet is embedded on the magnet yoke 101, and the top surface of the magnet is arc-surface-shaped.
The magnetic yoke 101 is cylindrical, the mounting hole 103 is located in the center of the magnetic yoke, the center line of the arc surface of the top surface of the magnet 102 coincides with the center line of the magnetic yoke 101, in this embodiment, the radius of the arc surface of the top surface of the magnet 102 is larger than the radius of the magnetic yoke 101, M process holes 104 are formed in the inner wall of the magnetic yoke 101 around the mounting hole 103, M is a natural number, and the process holes 104 are communicated with the mounting hole 103.
In this embodiment, N is 1, the pair of magnets 102 are symmetrically installed at 180 °, the fabrication hole 104 is a semicircular hole, M is 4, the yoke 101 is made of electrical steel, the surface of the yoke corresponds to the magnet 102 and is provided with an installation groove, a part of the lower portion of the magnet 102 is embedded in the corresponding installation groove, and the bottom surface of the yoke is bonded to the bottom of the installation groove.
In addition, the cross section of the magnet 102 may be square, circular, oval, or other shapes as desired.
Embodiment 2, as shown in fig. 3 to 5, a hollow cup type brush motor stator includes the magnetic steel structure described in embodiment 1, and further includes an integrally formed housing, where the housing includes a cylindrical housing 201, one end of the housing 201 is stamped to form a bottom surface 202, a portion of the bottom surface 202 is stamped toward the inside of the housing 201 to form a bearing chamber, a portion of a bottom 204 of the bearing chamber is stretched toward the inside of the housing 201 to form a column portion 203, the magnetic steel structure is mounted on the column portion 203 through the mounting hole 103, and glue is injected into the process hole 104 to fix the two firmly.
The laminating of magnet steel structure's one end terminal surface is in on the bottom 204, column portion 203 is the pipe form, and its length more than or equal to 5mm, bearing 301 is installed to the bearing room.
Finally, it should be noted that the above-mentioned description is only a preferred embodiment of the present invention, and those skilled in the art can make various similar representations without departing from the spirit and scope of the present invention.
Claims (9)
1. The utility model provides a hollow cup formula has magnet steel structure of brush motor which characterized in that: the magnetic yoke comprises a magnetic yoke (101), wherein N pairs of magnets (102) are symmetrically arranged on the surface of the magnetic yoke (101), N is less than or equal to 2, the magnets (102) have magnetism, the top surface of each pair of magnets (102) is respectively a south pole and a north pole, and a mounting hole (103) is formed in the magnetic yoke (101).
2. A magnetic steel structure of a hollow cup type brush motor according to claim 1, wherein: the cross section of the magnet (102) is steamed bread-shaped, the lower part of the magnet is square-shaped, at least one part of the magnet is embedded on the magnet yoke (101), and the top surface of the magnet is arc-surface-shaped.
3. A magnetic steel structure of a hollow cup type brush motor according to claim 2, wherein: the magnetic yoke (101) is cylindrical, the mounting hole (103) is located in the center of the magnetic yoke, and the center line of the arc surface on the top surface of the magnet (102) is superposed with the center line of the magnetic yoke (101).
4. A magnetic steel structure of a hollow cup type brush motor according to claim 2 or 3, wherein: the radius of the arc surface of the top surface of the magnet (102) is larger than that of the magnetic yoke (101).
5. A magnetic steel structure of a hollow cup type brush motor according to claim 4, wherein: m process holes (104) are formed in the inner wall of the magnet yoke (101) around the mounting hole (103), M is a natural number, and the process holes (104) are communicated with the mounting hole (103).
6. A magnetic steel structure of a hollow cup type brush motor according to claim 5, wherein: and N is 1.
7. The utility model provides a hollow cup formula has brush motor stator which characterized in that: the magnetic steel structure comprises the magnetic steel structure of any one of claims 1 to 3, and further comprises an integrally formed machine shell, wherein the machine shell comprises a cylindrical shell (201), one end of the shell (201) is punched to form a bottom surface (202), a part of the bottom surface (202) is punched towards the inside of the shell (201) to form a bearing chamber, a part of the bottom (204) of the bearing chamber is pulled towards the inside of the shell (201) to form a columnar part (203), and the magnetic steel structure is installed on the columnar part (203) through the installation hole (103).
8. The hollow cup brush motor stator according to claim 7, wherein: the length of the columnar part (203) is greater than or equal to 5 mm.
9. The hollow cup brush motor stator according to claim 7, wherein: and a bearing (301) is arranged in the bearing chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122136396.0U CN216056514U (en) | 2021-09-06 | 2021-09-06 | Magnetic steel structure of hollow cup type brush motor and motor stator with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122136396.0U CN216056514U (en) | 2021-09-06 | 2021-09-06 | Magnetic steel structure of hollow cup type brush motor and motor stator with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216056514U true CN216056514U (en) | 2022-03-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122136396.0U Active CN216056514U (en) | 2021-09-06 | 2021-09-06 | Magnetic steel structure of hollow cup type brush motor and motor stator with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216056514U (en) |
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2021
- 2021-09-06 CN CN202122136396.0U patent/CN216056514U/en active Active
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