CN218335648U - Integrated magnetic ring rotor injection molding body and permanent magnet motor using same - Google Patents
Integrated magnetic ring rotor injection molding body and permanent magnet motor using same Download PDFInfo
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- CN218335648U CN218335648U CN202222780501.9U CN202222780501U CN218335648U CN 218335648 U CN218335648 U CN 218335648U CN 202222780501 U CN202222780501 U CN 202222780501U CN 218335648 U CN218335648 U CN 218335648U
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Abstract
The utility model discloses an integral type magnetic ring rotor injection molding and use its permanent-magnet machine, include: a magnetic ring body including a plurality of magnetic poles alternately distributed regularly in a circumferential direction; the magnetic ring body is provided with a hollow cylindrical injection molding cavity; the injection molding body comprises a main body part suitable for being injection molded in the columnar injection molding cavity and a pair of extension parts integrally molded outside the columnar injection molding cavity respectively; a pair of extending parts and the inner part of the main body part are penetrated and molded to form through holes extending along the axial direction; a thread structure is formed inside the through hole; and the limiting lug bosses comprise a pair of injection molding lug bosses which are respectively injection molded on the circumferential outer side walls of the pair of extension parts and are suitable for being in butt joint with two shaft ends of the magnetic ring body.
Description
Technical Field
The utility model relates to a motor structure technical field especially relates to an integral type magnetic ring rotor injection molding and use its permanent-magnet machine.
Background
The rotor of the permanent magnet motor needs to be provided with a magnetic ring to reduce electromagnetic interference, and the rotor is easy to fall off and damage in the high-speed operation process under the structure that the magnetic sheet is embedded on the traditional rotor, so that the structure that the magnetic ring and the rotor are integrally molded appears in the prior art, for example, the rotor assembly disclosed in the patent with the publication number of CN 213072239U comprises a magnetic ring body, an injection molding body and an injection molding cross assembly; on this structure basis, the integral type injection structure of magnetic ring rotor is formed with the injection molding body under the effect of the cross assembly that moulds plastics, compares mosaic structure, and integral type injection structure not only structural strength is high, and machine-shaping simple process moreover.
However, based on the above-mentioned disclosure, in order to achieve radial and axial spacing of the magnet ring, an injection molding cross assembly is designed, which includes a male connection portion and a female connection portion adapted to form a cross fit. In the structure, the male connecting part needs to be designed and formed in advance in the injection molding accommodating cavity of the magnetic ring with the conventional columnar structure, a certain process needs to be consumed in the operation process, and the processing cost is increased due to the complexity of the process, so that the structure of the magnetic ring rotor injection molding body needs to be further optimized from the viewpoint of reducing the processing cost by simplifying the processing process. In addition, the integral injection molding structure of the magnetic ring rotor only has a magnetic ring inside, so that the overall magnetic density is limited, and the overall magnetic field performance is limited.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an integral type magnetic ring rotor injection molding to solve the technical problem who simplifies the overall structure of magnetic ring rotor injection molding.
A second object of the utility model is to provide a permanent-magnet machine to solve the technical problem who simplifies the overall structure of the magnetic ring rotor injection molding body among the permanent-magnet machine.
The utility model discloses an integral type magnetic ring rotor injection molding is realized like this:
an integral magnetic ring rotor injection molding body, comprising:
a magnetic ring body including a plurality of magnetic poles alternately distributed regularly in a circumferential direction; the magnetic ring body is provided with a hollow cylindrical injection molding cavity;
the injection molding body comprises a main body part suitable for being injection molded in the columnar injection molding cavity and a pair of extension parts integrally molded outside the columnar injection molding cavity respectively; a pair of through holes which extend along the axial direction are formed in the extending parts and the main body part in a penetrating mode; a thread structure is formed inside the through hole;
and the limiting lug bosses comprise a pair of injection molding lug bosses which are respectively injection molded on the circumferential outer side walls of the pair of extension parts and are suitable for being in butt joint with two shaft ends of the magnetic ring body.
In an alternative embodiment of the present invention, the injection molding bosses respectively located at the two axial end sides of the magnetic ring body are annular structures.
In the optional embodiment of the present invention, the injection molding bosses respectively located at the two axial end sides of the magnetic ring body each include a plurality of injection molding projections distributed at intervals along the circumferential direction.
In an optional embodiment of the present invention, the injection molding boss located at one axial end side of the magnetic ring body is an annular structure; and
the injection molding boss positioned at the other axial end side of the magnetic ring body comprises a plurality of injection molding lugs distributed at intervals along the circumferential direction.
In an optional embodiment of the present invention, the outer diameters of the injection molding bosses respectively located at the two axial end sides of the magnetic ring body are both smaller than the outer diameter of the magnetic ring body; and
the outer diameters of the injection molding bosses respectively positioned at the two shaft end sides of the magnetic ring body are the same or different.
In an alternative embodiment of the present invention, a ratio of an inner diameter to an outer diameter of the magnet ring body is 0.76.
In an alternative embodiment of the present invention, the inner wall of the magnet ring body is provided with a ferromagnetic sleeve.
In an alternative embodiment of the present invention, the outer side walls of a pair of the extension portions are respectively formed with a bearing mounting portion and a bearing positioning portion adapted to be fitted in abutment with the shaft ends of the bearings.
In an alternative embodiment of the present invention, at least one axial end of the magnet ring body is formed with a recessed positioning groove adapted for insertion of injection molding material.
The utility model discloses a permanent-magnet machine realizes like this:
a permanent magnet electric machine comprising: the rotor comprises an integrated magnetic ring rotor injection molding body and a rotor shaft suitable for being matched and connected with the injection molding body.
By adopting the technical scheme, the utility model discloses following beneficial effect has: the utility model discloses an integral type magnetic ring rotor injection molding and use its permanent-magnet machine, the structure that magnetic ring body and the integrative of injection molding were moulded plastics is compared the studded structure of pasting, and manufacturing procedure is simple high-efficient, and the overall structure's that forms firmness is high. More specifically, the injection molding bosses formed at two shaft ends of the magnetic ring body respectively play a role in fixing the magnetic ring body, so that the magnetic ring body cannot generate radial or axial offset. And the pair of injection molding bosses form a clamping structure for two shaft ends of the magnetic ring body, so that the connection strength between the magnetic ring body and the injection molding body can be improved.
In addition, the inner wall of the magnetic ring body is provided with the ferromagnetic sleeve, and a magnetic field between the iron sheet and the magnet can be magnetized to a certain extent due to the ferromagnetism of the iron sheet, so that a gap field can be generated, magnetic lines of force can be concentrated by the gap field, the attraction force and the magnetic density can be improved, and the magnetic field is enlarged.
In addition, through the sunken constant head tank that is suitable for the injection molding material embedding that is formed at least one axial end of magnetic ring body for the injection molding body and the magnetic ring body in the in-process of integrative moulding plastics, the plastics of moulding plastics can fill to the constant head tank in, play the positioning action, can prevent that the magnetic ring body from appearing the rotation of circumference aspect.
Drawings
Fig. 1 is a schematic view of the overall structure of the integrated magnetic ring rotor injection molding body of the present invention;
fig. 2 is a schematic sectional structural view of the integrated magnetic ring rotor injection molding body of the present invention;
fig. 3 is a schematic structural view of a positioning groove on a magnet ring body of the integrated magnet ring rotor injection molding body of the present invention;
fig. 4 is a schematic view of magnetic pole distribution of a magnetic ring body of the integrated magnetic ring rotor injection molding body according to an optional embodiment of the present invention;
fig. 5 is a schematic structural view of the magnetic ring body of the integrated magnetic ring rotor injection molding body of the present invention, which is provided with a ferromagnetic sleeve under an optional implementation condition.
In the figure: the magnetic ring comprises a magnetic ring body 1, a positioning groove 11, a columnar injection molding cavity 13, a main body part 21, an extension part 22, a thread structure 23, an injection molding boss 31, an injection molding lug 32, a ferromagnetic sleeve 4, a bearing mounting part 51 and a bearing positioning part 52.
Detailed Description
In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is provided in connection with the accompanying drawings.
Example 1:
referring to fig. 1 to 4, the present embodiment provides an injection molded body of an integrated magnetic ring rotor, including: the magnetic ring body 1 and the injection molding body are suitable for injection molding into an integral structure.
Specifically, firstly, the magnet ring body 1 is designed to be a cylindrical structure in order to reduce the material used for the magnet ring body 1 and simplify the structure of the magnet ring body 1, thereby reducing the cost of the magnet ring body 1 and improving the performance of the magnet ring body 1. And the magnetic ring body 1 of the present embodiment includes a plurality of N, S magnetic poles regularly and alternately distributed in the circumferential direction, as in the present embodiment, a total of eight N stages and S poles alternately arranged with each other. The magnetic ring body 1 is provided with a hollow cylindrical injection molding cavity 13.
It should be noted that, in order to enhance the magnetism of the magnetic ring body 1, the ratio of the inner diameter to the outer diameter of the magnetic ring body 1 in this embodiment is 0.76.
Secondly, an injection molding body comprises a main body part 21 suitable for being injection molded in the columnar injection molding cavity 13 and a pair of extension parts 22 respectively integrally molded outside the columnar injection molding cavity 13; a pair of through holes extending in the axial direction are formed through the extension portions 22 and the main body portion 21; in view of facilitating the rapid assembly of the injection molded body and the rotor shaft, a threaded structure 23 is formed inside the through hole, so that the rotor shaft and the injection molded body can be connected in a threaded manner.
The injection molded body of the present embodiment has a columnar structure that conforms to the columnar injection molding cavity 13, and a stopper boss is injection molded on the injection molded body.
Roughly speaking, the limit boss comprises a pair of injection molding bosses 31 which are respectively injection molded on the circumferential outer side walls of the pair of extension parts 22 and are suitable for being in butt fit with two shaft ends of the magnetic ring body 1.
As for the pair of injection-molded bosses 31 in the present embodiment, the following three different cases may be included:
first, the injection bosses 31 respectively located at the two axial end sides of the magnet ring body 1 are all annular structures.
Secondly, the injection bosses 31 respectively positioned at the two axial end sides of the magnetic ring body 1 respectively comprise a plurality of injection lugs 32 distributed at intervals along the circumferential direction; the sectional shape of the injection molding protrusion 32 is not limited in this embodiment, and may be a rectangular shape of a specification or a special shape. Under this kind of structure, compare the first condition, under the prerequisite that can reach the axial limiting displacement to two axle heads of magnetic ring body 1, can also practice thrift the use amount of the material of moulding plastics.
Thirdly, the injection molding boss 31 positioned at one axial end side of the magnetic ring body 1 is an annular structure body; the injection molding boss 31 positioned at the other axial end side of the magnetic ring body 1 comprises a plurality of injection molding lugs 32 distributed at intervals along the circumferential direction; the sectional shape of the injection molding protrusion 32 is not limited in this embodiment, and may be a rectangular shape of a specification or a special shape.
For the outer diameters of the pair of injection bosses 31 in the three different cases, the outer diameters of the injection bosses 31 respectively located at the two axial end sides of the magnet ring body 1 may be the same or different, and this embodiment is not limited in any way. However, the outer diameters of the injection bosses 31 respectively located at the two axial end sides of the magnetic ring body 1 are smaller than the outer diameter of the magnetic ring body 1. Under the structure, on one hand, the demolding operation is convenient in the injection molding process; on the other hand, the purpose of assembling the integrated magnetic ring rotor injection molding body with other parts of the permanent magnet motor at the later stage is convenient; on the other hand, on the premise that the axial limiting effect on the two shaft ends of the magnetic ring body 1 can be achieved, the use amount of injection molding materials can be saved.
In addition to the above structure, further, in the present embodiment, in order to facilitate the later assembly of the integrally magnetic ring rotor injection molded body with the bearing in the permanent magnet motor, a bearing mounting portion 51 and a bearing positioning portion 52 adapted to be in abutting engagement with the shaft end of the bearing are respectively formed on the outer side walls of the pair of extension portions 22. That is, after the bearing is mounted on the bearing mounting portion 51, one shaft end of the bearing just abuts on the bearing positioning portion 52, so that the mounting and positioning processes for the bearing can be simplified for the structure of the whole permanent magnet motor.
In an alternative embodiment, a recess-shaped positioning groove 11 suitable for embedding the injection molding compound is formed in at least one axial end of the magnet ring body 1. Make the injection molding body and magnetic ring body 1 at the in-process of integrative moulding plastics, the plastics of moulding plastics can fill to constant head tank 11 in, play the positioning action, can prevent that the rotation of circumference aspect from appearing in magnetic ring body 1.
Example 2:
referring to fig. 5, on the basis of the injection molded body of the integral magnetic ring rotor in embodiment 1, the injection molded body of the integral magnetic ring rotor provided in this embodiment further has a ferromagnetic sleeve 4 disposed on the inner wall of the magnetic ring body 1. The magnetic field between the iron sheet and the magnet can magnetize the iron sheet to a certain extent due to the ferromagnetism of the iron sheet, and a gap field K is generated, so that the gap field can concentrate magnetic lines of force, the attraction force and the magnetic density can be improved, the magnetic field is enlarged, and the performance can be improved by 30% at most.
Example 3:
on the basis of the injection molded body of the integrated magnetic ring rotor in embodiment 1 or embodiment 2, the present embodiment provides a permanent magnet motor, including: the one-piece magnetic ring rotor injection molded body of embodiment 1 or embodiment 2 and the rotor shaft adapted to mate with the injection molded body.
The above embodiments further describe the objects, technical solutions and advantages of the present invention in detail, it should be understood that the above embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the equipment or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "suspended" and the like do not imply that the components are absolutely horizontal or suspended, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the present disclosure, unless otherwise expressly stated or limited, the first feature may comprise both the first and second features directly contacting each other, and also may comprise the first and second features not being directly contacting each other but being in contact with each other by means of further features between them. Also, the first feature being above, on or above the second feature includes the first feature being directly above and obliquely above the second feature, or merely means that the first feature is at a higher level than the second feature. A first feature being below, beneath or beneath a second feature includes the first feature being directly below and obliquely below the second feature or simply indicating that the first feature is at a lesser level than the second feature.
Claims (10)
1. The utility model provides an integral type magnetic ring rotor injection molding which characterized in that includes:
a magnetic ring body including a plurality of magnetic poles alternately distributed regularly in a circumferential direction; the magnetic ring body is provided with a hollow cylindrical injection molding cavity;
the injection molding body comprises a main body part suitable for being injection molded in the columnar injection molding cavity and a pair of extension parts integrally molded outside the columnar injection molding cavity respectively; a pair of through holes which extend along the axial direction are formed in the extending parts and the main body part in a penetrating mode; a thread structure is formed inside the through hole;
and the limiting lug bosses comprise a pair of injection molding lug bosses which are respectively injection molded on the circumferential outer side walls of the pair of extension parts and are suitable for being in butt joint with two shaft ends of the magnetic ring body.
2. The injection molded body of an integrally magnetic ring rotor as claimed in claim 1, wherein the injection molded bosses respectively located at both axial end sides of the magnetic ring body are both annular structures.
3. The injection molded body of an integrally molded magnetic ring rotor as claimed in claim 1, wherein the injection molded bosses respectively located at both axial end sides of the magnetic ring body each include a plurality of injection molded protrusions spaced apart in a circumferential direction.
4. The injection molded body of an integrally magnetic ring rotor as claimed in claim 1, wherein the injection molded boss at one axial end side of the magnetic ring body is a ring-shaped structure; and
the injection molding boss positioned at the other axial end side of the magnetic ring body comprises a plurality of injection molding lugs distributed at intervals along the circumferential direction.
5. The integrally magnetic ring rotor injection molded body as claimed in any one of claims 2 to 4, wherein the outer diameters of the injection bosses respectively located at both axial end sides of the magnetic ring body are smaller than the outer diameter of the magnetic ring body; and
the outer diameters of the injection molding bosses respectively positioned at the two shaft end sides of the magnetic ring body are the same or different.
6. The integrally formed magnetic ring rotor injection molded body of claim 1 wherein the ratio of the inner diameter to the outer diameter of the magnetic ring body is 0.76.
7. The injection molded body of an integrally formed magnetic ring rotor as claimed in claim 1 wherein said magnetic ring body has a ferromagnetic sleeve on an inner wall thereof.
8. The injection molded body of an integrally magnetic ring rotor as claimed in claim 1, wherein the outer side walls of a pair of said extensions are respectively formed with a bearing mounting portion and a bearing positioning portion adapted to be in abutting engagement with the shaft ends of the bearings.
9. The injection molded body of an integral magnetic ring rotor as claimed in claim 1 wherein at least one axial end of said magnetic ring body is formed with a recessed locating groove adapted for insertion of injection molding compound.
10. A permanent magnet electric machine, comprising: an integrally magnetic ring rotor injection molded body as claimed in any one of claims 1 to 9 and a rotor shaft adapted to mate with said injection molded body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222780501.9U CN218335648U (en) | 2022-10-21 | 2022-10-21 | Integrated magnetic ring rotor injection molding body and permanent magnet motor using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222780501.9U CN218335648U (en) | 2022-10-21 | 2022-10-21 | Integrated magnetic ring rotor injection molding body and permanent magnet motor using same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218335648U true CN218335648U (en) | 2023-01-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222780501.9U Active CN218335648U (en) | 2022-10-21 | 2022-10-21 | Integrated magnetic ring rotor injection molding body and permanent magnet motor using same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218335648U (en) |
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2022
- 2022-10-21 CN CN202222780501.9U patent/CN218335648U/en active Active
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