CN218161956U

CN218161956U - Improve outer rotor brushless motor of electromagnetic noise

Info

Publication number: CN218161956U
Application number: CN202221917809.7U
Authority: CN
Inventors: 刘德广; 龙兴波
Original assignee: Hunan Guomeng Technology Co ltd
Current assignee: Hunan Guomeng Technology Co ltd
Priority date: 2022-07-25
Filing date: 2022-07-25
Publication date: 2022-12-27
Anticipated expiration: 2032-07-25

Abstract

The utility model discloses an improve external rotor brushless motor of electromagnetism noise relates to motor technical field. The utility model comprises a shell, an iron core is arranged in the shell, a plurality of magnets are arranged between the shell and the iron core, the magnets are arc-shaped structural blocks, and the plurality of magnets are sequentially arranged between the inner wall of the shell and the periphery of the iron core in a circumferential array; the middle part of one side of the iron core is provided with a machine base, two annular discs are arranged in the machine base, one side of one annular disc is provided with an inner ring, one side of the other annular disc is provided with a fixed ring, and the middle parts of the two annular discs, the inner ring and the fixed ring are provided with bearings. The utility model discloses a set up the magnetite and be the arc structure piece, make the magnetite be the circumference array laminating in proper order between shell inner wall and iron core week side, effectively weakened electromagnetic noise, improve the motor noise, make its operation more steady, increased the area of contact of magnetite and shell inner wall simultaneously, strengthened the thrust of magnetite and shell, effectively reduced the risk that the magnetite drops.

Description

Improve outer rotor brushless motor of electromagnetic noise

Technical Field

The utility model belongs to the technical field of the motor, especially, relate to an improve external rotor brushless motor of electromagnetism noise.

Background

The brushless motor is composed of a motor main body and a driver, and is a typical mechatronic product. Because the brushless motor runs in a self-control mode, a starting winding is not additionally arranged on a rotor like a synchronous motor which is started under the condition of heavy load under the condition of variable frequency speed regulation, and oscillation and step-out can not be generated when the load suddenly changes. The outer rotor is in the center of the motor, and a magnetic balance is maintained. However, in the case of unstable forces, any slight displacement will cause the rotor to move out of position and may even be completely decoupled from the stator. And the suspension control of the radial position is used for eliminating the eccentric displacement of the rotor of the motor. The outer rotor brushless motor has the characteristics of space saving, compact design and attractive appearance. The cooling device is suitable for being installed in the impeller and has the best cooling effect.

At present, the rotor sintered magnet adopted in the outer rotor brushless motor structure industry is in a 180-degree parallel angle, so that the design causes that the motor has heavier electromagnetic sound and is not stable in operation. Secondly reduced the area of contact of magnetite and rotor case, reduced the thrust of rotor magnetite and rotor case, increaseed the risk that the rotor magnetite drops at the rotor case.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an improve external rotor brushless motor of electromagnetism noise, the external rotor brushless motor who has solved among the prior art leads to the motor electromagnetism sound heavier, moves unstable technical problem.

In order to achieve the purpose, the utility model is realized by the following technical proposal:

an outer rotor brushless motor for improving electromagnetic noise comprises a shell, wherein an iron core is arranged in the shell, a plurality of magnets are arranged between the shell and the iron core, the magnets are arc-shaped structural blocks, and the plurality of magnets are sequentially arranged between the inner wall of the shell and the periphery of the iron core in a circumferential array manner;

the middle part of one side of the iron core is provided with a base, two annular discs are arranged in the base, one side of one annular disc is provided with an inner ring, one side of the other annular disc is provided with a fixed ring, and the middle parts of the two annular discs, the inner ring and the fixed ring are provided with bearings.

Optionally, a bottom cover is installed on one side of the housing, an end cover is installed on the other side of the housing, the bottom cover is sleeved on the periphery of the base, a plurality of buckles are fixed on one side of the end cover, and the plurality of buckles correspond to the housing.

Optionally, the iron core includes the barrel, be fixed in a plurality of rectangular plates of barrel week side, be fixed in the arc of rectangular plate one side, is equipped with the space between two adjacent arcs, and the inboard of magnetite corresponds with the arc, and the frame is located the barrel, and the bottom is located between shell and the frame.

The embodiment of the utility model has the following beneficial effect:

the utility model discloses an embodiment is arc structure piece through setting up the magnetite, makes the magnetite be the circumference array in proper order and laminates between shell inner wall and iron core week side, has effectively weakened electromagnetic noise, improves the motor noise, makes its operation more steady, has increased the area of contact of magnetite and shell inner wall simultaneously, has increaseed the thrust of magnetite and shell, has effectively reduced the risk that the magnetite drops.

Of course, it is not necessary for any particular product to achieve all of the above-described advantages simultaneously.

Drawings

The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the scope of the invention. In the drawings:

fig. 1 is a schematic view of a three-dimensional structure for assembling a housing according to an embodiment of the present invention;

fig. 2 is a schematic view of an end cover assembly perspective structure according to an embodiment of the present invention;

fig. 3 is a schematic view of a bottom cover assembly perspective structure according to an embodiment of the present invention;

fig. 4 is a schematic view of a magnet assembly perspective structure according to an embodiment of the present invention.

Wherein the figures include the following reference numerals:

the magnetic iron core comprises a shell 1, a magnet 2, an iron core 3, an annular disc 4, an inner ring 5, an end cover 6, a bearing 7, a fixing ring 8, a bottom cover 9 and a machine base 10.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

To maintain the following description of the embodiments of the present invention clear and concise, detailed descriptions of well-known functions and components may be omitted.

Referring to fig. 1 to 4, in the present embodiment, an outer rotor brushless motor for improving electromagnetic noise is provided, including: the magnetic iron core comprises a shell 1, wherein an iron core 3 is arranged in the shell 1, a plurality of magnets 2 are arranged between the shell 1 and the iron core 3, the magnets 2 are arc-shaped structural blocks, and the plurality of magnets 2 are sequentially attached between the inner wall of the shell 1 and the periphery of the iron core 3 in a circumferential array manner;

the middle part of one side of the iron core 3 is provided with a machine base 10, two annular discs 4 are arranged in the machine base 10, one side of one annular disc 4 is provided with an inner ring 5, one side of the other annular disc 4 is provided with a fixed ring 8, and the middle parts of the two annular discs 4, the inner ring 5 and the fixed ring 8 are provided with a bearing 7.

The application of one aspect of the embodiment is as follows: install iron core 3 in shell 1 earlier, install between 1 inner wall of shell and 3 week sides of iron core with 2 evenly distributed of a plurality of magnetite, then install bottom 9 in one side of shell 1, the middle part that frame 10 runs through bottom 9 is installed in iron core 3, then install two annular discs 4 in frame 10, install inner ring 5 and solid fixed ring 8 in one side of two annular discs 4 respectively, then install bearing 7 in inner ring 5, gu fixed ring 8 and two annular discs 4's middle part, install end cover 6 in the opposite side of shell 1 at last. It should be noted that all the electric devices referred to in this application may be powered by a storage battery or an external power source.

Through setting up magnetite 2 for the arc structure piece, make magnetite 2 be the circumference array in proper order and laminate between 1 inner wall of shell and 3 week sides of iron core, effectively weakened electromagnetic noise, improve the motor noise, make its operation more steady, increased the area of contact of magnetite 2 with 1 inner wall of shell simultaneously, strengthened the thrust of magnetite 2 with shell 1, effectively reduced the risk that magnetite 2 drops.

Referring to fig. 1-2, in the present embodiment, a bottom cover 9 is installed on one side of the housing 1, an end cover 6 is installed on the other side of the housing 1, the bottom cover 9 is sleeved on the periphery of the base 10, and a plurality of fasteners are fixed on one side of the end cover 6 and correspond to the housing 1. The bottom cover 9 and the end cover 6 are used for installing the rotor assembly in the housing 1 and stably and reliably work, and the end cover 6 is connected with the housing 1 through a plurality of buckles.

Referring to fig. 3-4, the iron core 3 of the present embodiment includes a cylindrical body, a plurality of rectangular plates fixed on the circumferential side of the cylindrical body, and arc plates fixed on one side of the rectangular plates, a gap is provided between two adjacent arc plates, the inner sides of the magnets 2 correspond to the arc plates, the base 10 is located in the cylindrical body, and the bottom cover 9 is located between the housing 1 and the base 10. The inner side of the magnet 2 is attached to the outer side of the arc-shaped plate.

The above embodiments may be combined with each other.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

In the description of the present invention, it should be understood that the directions or positional relationships indicated by the directional terms such as "front, back, upper, lower, left, right", "horizontal, vertical, horizontal" and "top, bottom", etc. are usually based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, and in the case of not making a contrary explanation, these directional terms do not indicate and imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore, should not be construed as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Claims

1. An outer rotor brushless motor for improving electromagnetic noise, comprising: the magnetic iron core structure comprises a shell (1), wherein an iron core (3) is arranged in the shell (1), a plurality of magnets (2) are arranged between the shell (1) and the iron core (3), the magnets (2) are arc-shaped structural blocks, and the plurality of magnets (2) are sequentially arranged in a circumferential manner and are attached between the inner wall of the shell (1) and the circumferential side of the iron core (3);

the middle part of one side of the iron core (3) is provided with a machine base (10), two annular discs (4) are arranged in the machine base (10), one side of one annular disc (4) is provided with an inner ring (5), one side of the other annular disc (4) is provided with a fixed ring (8), and the middle parts of the two annular discs (4), the inner ring (5) and the fixed ring (8) are provided with a bearing (7).

2. The external rotor brushless motor for improving electromagnetic noise of claim 1, wherein one side of the housing (1) is provided with a bottom cover (9), the other side of the housing (1) is provided with an end cover (6), and the bottom cover (9) is sleeved on the periphery of the machine base (10).

3. An external rotor brushless motor for improving electromagnetic noise as recited in claim 2, wherein a plurality of fasteners are fixed to one side of the end cap (6), and a plurality of fasteners correspond to the housing (1).

4. The external rotor brushless motor for improving electromagnetic noise according to claim 3, wherein the core (3) includes a cylindrical body, a plurality of rectangular plates fixed to the periphery of the cylindrical body, and arc plates fixed to one side of the rectangular plates, and a gap is provided between two adjacent arc plates.

5. An external rotor brushless motor for improving electromagnetic noise according to claim 4, wherein the inner side of the magnet (2) corresponds to the arc-shaped plate.

6. The external rotor brushless motor for improving electromagnetic noise of claim 4, wherein the base (10) is located in the cylinder, and the bottom cover (9) is located between the housing (1) and the base (10).