CN204068471U - A kind of retainer of brushless motor outer rotor assembly - Google Patents
A kind of retainer of brushless motor outer rotor assembly Download PDFInfo
- Publication number
- CN204068471U CN204068471U CN201420389231.1U CN201420389231U CN204068471U CN 204068471 U CN204068471 U CN 204068471U CN 201420389231 U CN201420389231 U CN 201420389231U CN 204068471 U CN204068471 U CN 204068471U
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- retainer
- permanent magnet
- location division
- motor casing
- casing
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Abstract
The utility model discloses a kind of retainer of brushless motor outer rotor assembly, its main points are: retainer is integrated through injection molding part.Retainer comprises location division.Location division entirety is in tubular, and its wall thickness is the thickness 1/3 to 1 of corresponding permanent magnet.The external diameter of location division is corresponding with the internal diameter of corresponding motor casing.Location division along its circumference at equal intervals angle be provided with the quantity location notch identical with permanent magnet quantity, its shape is corresponding with permanent magnet.Retainer bonding is fixedly installed in motor casing.
Description
Technical field
The utility model relates to machine field, is specifically related to a kind of retainer of brushless motor outer rotor assembly.
Background technology
Common External rotor electric machine rotor part generally includes casing, permanent magnet and magnetic guiding cycle, and wherein permanent magnet is again because magnetizing direction is divided into N pole and S pole, hereinafter referred to as N permanent magnet and S permanent magnet.Casing is aluminium diecasting normally, because driving shaft needs to coordinate by casing the requirement reaching external rotor with magnetic guiding cycle, so magnetic guiding cycle must be fixed in casing.Magnetic guiding cycle is silicon steel sheet stamping normally, the groove of locating and machining permanent magnet inside magnetic guiding cycle, and permanent magnet is fixed in the groove on magnetic guiding cycle, N permanent magnet and S permanent magnet alternate intervals spread configuration.The motor magnetic guiding cycle of this structure is generally single part, causes production cost greatly to increase; Secondly, magnetic guiding cycle has the groove installing permanent magnet, technique is loaded down with trivial details and difficulty of processing large, further increases production cost; Finally, when magnetic guiding cycle is fixedly installed in casing, normally along magnetic guiding cycle at equal intervals angle be provided with the counterbore that 3 to 6 run through its body in its axial direction, then by the corresponding bolt screwed on casing, magnetic guiding cycle is fixed on casing, this mounting means not only installs trouble but also higher to requirement on machining accuracy, otherwise magnetic conductor cannot put into casing.Chinese patent literature CN202405895U(number of patent application 201120567379.6) disclose " a kind of outer-rotor permanent magnet motor rotor structure ", wherein describe: " casing opens the first groove on the interior surfaces of revolution; the retainer of irony arc shape is embedded in casing with segmented mode; hop count can determine according to the number of permanent magnet and casing internal diameter two factor; the bottom interior surface of retainer 5 is provided with boss; be provided with S permanent magnet or N permanent magnet in the second groove formed between adjacent lands, and is contrary at the magnetic pole of the permanent magnet of same boss both sides.", this shows, retainer is installed comparatively complicated, produces installation effectiveness low.First, multistage retainer is set in same first groove, trouble is installed and high to retainer requirement on machining accuracy, not only will guarantee that linking between each retainer accurately but also will guarantee that each retainer can also just embed in the first groove after being connected; Secondly, also will ensure the axially mutual correspondence of the retainer not in same first groove at casing, otherwise permanent magnet can be caused not install, installation effectiveness reduces greatly; Finally, each retainer is embedded in casing, and casing opens the first groove on the interior surfaces of revolution, and processing trouble, casing thickness needs corresponding increase simultaneously, causes the corresponding increase of production cost.
Utility model content
It is simple that the purpose of this utility model is to provide a kind of structure, the retainer of the brushless motor outer rotor assembly that quick for installation and production cost is lower.
The basic technical scheme realizing the utility model object is: a kind of retainer of brushless motor outer rotor assembly, and its design feature is: retainer is integrated through injection molding part.Retainer comprises location division.Location division entirety is in tubular, and its wall thickness is the thickness 1/3 to 1 of corresponding permanent magnet.The external diameter of location division is corresponding with the internal diameter of corresponding motor casing.Location division along its circumference at equal intervals angle be provided with the quantity location notch identical with permanent magnet quantity, its shape is corresponding with permanent magnet.Retainer bonding is fixedly installed in motor casing.Further technical scheme based on above-mentioned basic technical scheme is: retainer also comprises upper limit portion.The internal diameter in upper limit portion is corresponding with the internal diameter of motor casing, and the external diameter in upper limit portion is less than the external diameter of motor casing.Upper limit portion is arranged in the upper periphery of location division.The equal opening upwards of each location notch of location division and run through its barrel along location division radial direction.
The utility model has positive effect: (1) retainer of the present utility model is integrated through injection molding part, and structure is simple, and production cost is low, easy to process.Retainer is also very convenient when being installed in motor casing, be conducive to enhancing productivity and motor gas-gap by the impact of retainer.Retainer is provided with upper limit portion, can accurately be positioned in motor casing by retainer, installs accurate quick.
(2) each location notch opening upwards of retainer of the present utility model, make permanent magnet quick for installation, greatly improve production and processing efficiency.Each location notch of retainer is corresponding with the shape of permanent magnet, and make permanent magnet accurate positioning, permanent magnet is uniformly distributed in motor casing.
Accompanying drawing explanation
Fig. 1 is the structural representation of the brushless motor outer rotor assembly applying retainer of the present utility model;
Fig. 2 is schematic diagram when observing downwards from the top of Fig. 1;
Fig. 3 is the A-A cutaway view in Fig. 1;
Fig. 4 is the vertical view of Fig. 1;
Fig. 5 is the schematic diagram of motor casing when observing downwards from the top of Fig. 1;
Fig. 6 is the schematic diagram of motor casing when upwards observing from the below of Fig. 1;
Fig. 7 is the schematic diagram of the retainer in Fig. 4;
Fig. 8 is the schematic perspective view of Fig. 7;
Fig. 9 is the schematic diagram of motor casing and retainer when observing downwards from the top of Fig. 1;
Figure 10 is the schematic diagram of motor casing, retainer and permanent magnet when observing downwards from the top of Fig. 1;
Figure 11 is the schematic diagram of fan blade when observing downwards from the top of Fig. 1;
Figure 12 is the schematic diagram of fan blade when upwards observing from the below of Fig. 1.
Mark in above-mentioned accompanying drawing is as follows:
Motor casing 1, axis hole 11, louvre 12,
Retainer 2, location division 21, location notch 21-1, upper limit portion 22,
Permanent magnet 3, driving shaft 4, fan blade 5.
Embodiment
The description in orientation of the present utility model is carried out according to the orientation shown in Fig. 1, and also namely the direction up and down shown in Fig. 1 is the direction up and down of description, and a side of court of Fig. 1 institute is front, and the side deviating from Fig. 1 is rear.
(embodiment 1)
See Fig. 1 to Fig. 4 and Fig. 7 to Figure 10, the retainer 2 of brushless motor outer rotor assembly of the present utility model is integrated through injection molding part.Retainer 2 comprises location division 21 and upper limit portion 22.Location division 21 entirety is in tubular, and its wall thickness is the wall thickness of the location division 21 of thickness 1/3 to 1(the present embodiment of permanent magnet 3 is 1/2 of the thickness of permanent magnet 3).The external diameter of location division 21 is corresponding with the internal diameter of motor casing 1.Location division 21 along its circumference at equal intervals angle be provided with the quantity location notch 21-1 identical with permanent magnet 3 quantity; The equal opening upwards of each location notch 21-1 and run through its barrel along location division 21 radial direction, its shape is corresponding with permanent magnet 3.The internal diameter in upper limit portion 22 is corresponding with the internal diameter of motor casing 1, and the external diameter in upper limit portion 22 is less than the external diameter of motor casing 1.Upper limit portion 22 is arranged in the upper periphery of location division 21.
(application examples 1)
See Fig. 1 to Fig. 3, the brushless motor outer rotor assembly of use-case should comprise motor casing 1, retainer, permanent magnet 3, driving shaft 4 and fan blade 5.Described retainer adopts the retainer 2 described in embodiment 1.
See Fig. 2, Fig. 3, Fig. 5 and Fig. 6, motor casing 1 is the integral piece that iron or mild steel are made, and should the motor casing 1 of use-case adopt 20 steel to make.Motor casing 1 housing in opening upwards, the wall thickness of motor casing 1 be 2 millimeters to 6 millimeters (should use-case be 3 millimeters).Motor casing 1 bottom center is provided with and runs through its upper and lower axis hole 11, and axis hole 11 forms for punching stretch, the degree of depth of the axis of axis hole 11 to be 4 millimeters to 8 millimeters (should use-case be 6 millimeters).Be provided with bottom motor casing 1 and run through its one group of upper and lower louvre 12.Louvre 12 is arranged around axis hole 11.
See Fig. 1 to Fig. 4 and Fig. 7 to Figure 10, retainer 2 bonding is fixedly installed in motor casing 1, and is positioned its upper-lower position in motor casing 1 by its upper limit portion 22.
See Fig. 2 to Fig. 4 and Figure 10, permanent magnet 3 comprises N permanent magnet and S permanent magnet, and N permanent magnet and S permanent magnet are crisscross arranged successively in each location notch 21-1 of retainer 2, and are bonded and fixed on motor casing 1.The upper surface of permanent magnet 3 is equal with the upper surface of motor casing 1.
See Fig. 1 to Fig. 4, driving shaft 4 is coaxially fixedly installed in motor casing 1, and protrudes upward outside motor casing.Driving shaft 4 and motor casing 1 interference fit, and driving shaft 4 is by the axis hole 11 of its lower end through motor casing 1.
See Fig. 1 to Fig. 4, Figure 11 and Figure 12, fan blade 5 is integrated through injection molding part, and fan blade 5 is fixedly installed on the lower end of driving shaft 4, is positioned at the below of motor casing 1, its upper surface contacts with the lower surface of motor casing 1, the air-flow of motor casing 1 inside can be released by louvre 12 when fan blade 5 rotates.
Above embodiment is only for illustration of the utility model; but not to restriction of the present utility model; person skilled in the relevant technique is not when departing from spirit and scope of the present utility model; various conversion and change can also be made; can also transform accordingly according to the inspiration of above-described embodiment in embody rule process, therefore all equivalent technical schemes all should be included within scope of patent protection of the present utility model.
Claims (2)
1. a retainer for brushless motor outer rotor assembly, is characterized in that: retainer (2) is integrated through injection molding part; Retainer (2) comprises location division (21); Location division (21) entirety is in tubular, and its wall thickness is the thickness 1/3 to 1 of corresponding permanent magnet (3); The external diameter of location division (21) is corresponding with the internal diameter of corresponding motor casing (1); Location division (21) along its circumference at equal intervals angle be provided with the quantity location notch (21-1) identical with permanent magnet (3) quantity, its shape is corresponding with permanent magnet (3); Retainer (2) bonding is fixedly installed in motor casing (1).
2. the retainer of brushless motor outer rotor assembly according to claim 1, is characterized in that: retainer (2) also comprises upper limit portion (22); The internal diameter in upper limit portion (22) is corresponding with the internal diameter of motor casing (1), and the external diameter of upper limit portion (22) is less than the external diameter of motor casing (1); Upper limit portion (22) is arranged in the upper periphery of location division (21); Each location notch (21-1) of location division (21) all opening upwards and run through its barrel along location division (21) radial direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420389231.1U CN204068471U (en) | 2014-07-14 | 2014-07-14 | A kind of retainer of brushless motor outer rotor assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420389231.1U CN204068471U (en) | 2014-07-14 | 2014-07-14 | A kind of retainer of brushless motor outer rotor assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204068471U true CN204068471U (en) | 2014-12-31 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420389231.1U Active CN204068471U (en) | 2014-07-14 | 2014-07-14 | A kind of retainer of brushless motor outer rotor assembly |
Country Status (1)
| Country | Link |
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| CN (1) | CN204068471U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110829650A (en) * | 2018-08-14 | 2020-02-21 | 佛山市建准电子有限公司 | Rotor of motor |
-
2014
- 2014-07-14 CN CN201420389231.1U patent/CN204068471U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110829650A (en) * | 2018-08-14 | 2020-02-21 | 佛山市建准电子有限公司 | Rotor of motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder |
Address after: 213011 No. 1 Wuyi Road, Qishuyan Economic Development Zone, Changzhou, Jiangsu Patentee after: Heli Electrical Appliances Co., Ltd., Changzhou City Address before: 213011 North Village, Qishuyan Railway Station, Qishuyan District, Changzhou, Jiangsu Patentee before: Heli Electrical Appliances Co., Ltd., Changzhou City |
|
| CP02 | Change in the address of a patent holder |