CN215870989U - Connecting structure of brushless motor casing and plastic fan blade - Google Patents
Connecting structure of brushless motor casing and plastic fan blade Download PDFInfo
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- CN215870989U CN215870989U CN202122007112.8U CN202122007112U CN215870989U CN 215870989 U CN215870989 U CN 215870989U CN 202122007112 U CN202122007112 U CN 202122007112U CN 215870989 U CN215870989 U CN 215870989U
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- fan blade
- plastic fan
- casing
- plastic
- brushless motor
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Abstract
The utility model discloses a connecting structure of a casing and a plastic fan blade of a brushless motor, which comprises: the plastic fan blade comprises a cylindrical shell and a plastic fan blade, wherein the plastic fan blade is encapsulated at one end of the shell in an injection molding mode, a side hole is formed in the shell corresponding to the circumferential wall of the plastic fan blade, the inward opening end face of the side hole is larger than the outward opening end face of the side hole, a convex buckle is formed on the inner circumferential face of the plastic fan blade, and the convex buckle is correspondingly inserted, fixed and injected into the side hole in an injection molding mode, so that the connection holding force between the shell and the plastic fan blade is stable and reliable. In order to meet the requirements of not exploding when the motor rotates at a high speed and not increasing the cost too much, the side holes are additionally arranged on the shell to fill and fixedly connect the structure during injection molding, so that the holding force between the shell and the plastic fan blade is increased, the purpose that the motor rotates at a high speed and does not explode is achieved, the use function of the product is met, laser welding is not needed, and the cost is reduced.
Description
Technical Field
The utility model belongs to the technical field of brushless motors, and particularly relates to a connecting structure of a shell and a plastic fan blade.
Background
A cylindrical shell of the brushless motor is subjected to punch forming and then injection molding and encapsulation, and in the prior art, as the encapsulation at the injection molding position of the shell is less, the motor can be exploded when rotating at a high speed. At present, the common solution in the industry is to use laser welding to reinforce the interface after punch forming, and the welding position is welded along the interface lines, which leads to the increase of the cost.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a connecting structure of a shell and a plastic fan blade of a brushless motor.
The technical scheme adopted by the utility model for solving the technical problems is as follows: the utility model provides a brushless motor's casing and plastic fan blade's connection structure, includes: the plastic fan blade comprises a cylindrical shell and a plastic fan blade which is encapsulated at one end of the shell in an injection molding mode, wherein a side hole is formed in the shell corresponding to the circumferential wall of the plastic fan blade, a convex buckle is formed on the inner circumferential surface of the plastic fan blade and is correspondingly inserted, fixed and injected into the side hole in an injection molding mode, and therefore the connection and the holding force between the shell and the plastic fan blade are stable and reliable.
The inward opening end surface of the side hole is larger than the outward opening end surface of the side hole.
The side hole is big-in-outer little ladder counter sink form, perhaps is big-in-outer little hourglass hopper-shaped.
The end part of the casing is provided with a side notch, the plastic fan blade is provided with a convex clamping platform corresponding to the side notch, and the convex clamping platform is correspondingly inserted and fixedly injected into the side notch.
The inner circumferential surface of the shell is provided with an annular wire groove in a concave mode, and the magnets are fixedly connected through the annular wire groove in an adhesive mode.
The shell is made of iron through a punch forming process.
The side hole is provided with a plurality of, and is the equipartition on same horizontal circumference, or each equipartition on different horizontal circumferences.
The opening shape of the side hole can be circular, oval, rectangular or polygonal.
Compared with the prior art, the utility model has the beneficial effects that:
in order to meet the requirements that the motor cannot be exploded when rotating at a high speed and the cost cannot be excessively increased, the side holes are additionally formed in the casing, so that the filling and fastening connection structure is filled during injection molding, the holding force between the casing and the plastic fan blades is increased, the motor can rotate at a high speed without being exploded, and the use function of a product is met; the shell produced by stamping is directly used, the drawing tolerance size is kept according to the requirement, laser welding is not needed, and the cost is reduced.
Drawings
In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced, wherein:
FIG. 1 is a schematic diagram of a housing structure according to a preferred embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a plastic blade according to a preferred embodiment of the present invention;
FIG. 3 is an assembly view of the preferred embodiment of the present invention.
Detailed Description
The utility model will be further described with reference to the accompanying drawings and specific embodiments. In the preferred embodiments, the terms "upper", "lower", "left", "right", "middle" and "a" are used for clarity of description only, and are not used to limit the scope of the utility model, and the relative relationship between the terms and the terms is not changed or modified substantially without changing the technical content of the utility model.
Referring to fig. 1 to 3, a connection structure between a housing and a plastic blade of a brushless motor according to a preferred embodiment of the present invention mainly includes: the fan comprises a cylindrical casing 1 made of metal and a plastic fan blade 2 which is encapsulated at one end of the casing 1 in an injection molding mode, wherein a side hole 3 is formed in the casing 1 corresponding to the circumferential wall of the plastic fan blade 2, a convex buckle 4 is formed on the plastic fan blade 2 corresponding to the inner circumferential surface of the casing 1, and the convex buckles 4 are inserted, fixed and injected into the side hole 3 in a one-to-one corresponding mode, so that the connection and holding force between the casing 1 and the plastic fan blade 2 is stable and reliable. The outer rotor component of the brushless motor is assembled by a ring, and the mode of improving the holding force can be various, but the scheme provides an implementation mode which is relatively easy to realize, has the least cost increase and has the simplest working procedure.
Further, the inwardly facing end surface of the side hole 3 is larger than the outwardly facing end surface thereof, for example: the common stepped hole shape with large inside and small outside, or the funnel shape with large inside and small outside, etc. The opening shape of the side hole 3 may be circular, oval, rectangular, polygonal, etc., and is not limited to the shape illustrated in the drawings. The side holes 3 may be provided in plurality, equally distributed on the same horizontal circumference, or equally distributed on different horizontal circumferences, respectively. The convex buttons 4 are formed in the side holes 3 in an injection molding mode, so that the shapes and the distribution rules of the convex buttons 4 correspond to those of the side holes 3.
In addition, the side hole 3 can be further expanded to be a side notch 6 formed at the end part of the casing 1, the plastic fan blade 2 is provided with a convex clamping platform 7 corresponding to the side notch 6, the convex clamping platforms 7 are inserted, fixed and injected into the side notch 6 one by one, and similarly, the shape and the distribution rule of the convex clamping platforms 7 correspond to the side notch 6.
Further, the casing 1 is made of iron through a punch forming process, and the side holes 3 and the side grooves 6 are punched and formed at the same time. The inner circumferential surface of the casing 1 is provided with a plurality of annular wire grooves 5 which are arranged at intervals in a concave mode, and when the outer rotor component is assembled, the magnets are fixedly connected through the annular wire grooves 5 in a gluing mode, so that the structure is firmer.
Furthermore, the plastic fan blade 2 is made of plastic material, and the whole plastic fan blade 2, the convex buckle 4 and the convex clamping platform 7 are integrally molded and encapsulated in the casing 1.
After the shell 1 is subjected to punch forming, the concentricity is within 0.05 mm; after the plastic fan blade 2 is encapsulated by the casing 1, the whole concentricity and perpendicularity are within 0.05mm and the problems of deformation and burrs, glue deficiency and air holes and the like cannot occur.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any indirect modifications, equivalent changes and modifications made to the above embodiment according to the technical spirit of the present invention by those skilled in the art are within the technical scope of the present invention.
Claims (8)
1. The utility model provides a brushless motor's casing and plastic fan blade's connection structure which characterized in that includes: the fan comprises a cylindrical shell and a plastic fan blade which is encapsulated at one end of the shell in an injection molding mode, wherein a side hole is formed in the shell corresponding to the circumferential wall of the plastic fan blade, and a convex buckle is formed on the inner circumferential surface of the plastic fan blade and is correspondingly inserted, fixed and injected into the side hole.
2. The connecting structure for the casing and the plastic fan blade of the brushless motor according to claim 1, wherein an end surface of the inward opening of the side hole is larger than an end surface of the outward opening of the side hole.
3. The connecting structure of the casing and the plastic blades of the brushless motor according to claim 2, wherein the side holes are in a shape of a stepped countersunk hole with a large inside and a small outside, or in a shape of a funnel with a large inside and a small outside.
4. The connecting structure of the casing and the plastic blade of the brushless motor according to claim 1, wherein a side groove is formed at an end of the casing, and a boss is formed on the plastic blade corresponding to the side groove and is inserted, fixed and injected into the side groove.
5. The connecting structure of the casing and the plastic fan blade of the brushless motor according to claim 1, wherein an annular slot is recessed on an inner circumferential surface of the casing, and the magnet is fixedly bonded through the annular slot by adhesion.
6. The connecting structure of the housing and the plastic fan blade of the brushless motor according to claim 1, wherein the housing is made of iron by a stamping forming process.
7. The connecting structure for the casing and the plastic fan blade of the brushless motor according to claim 1, wherein the side holes are provided in plural numbers, and are equally distributed on the same horizontal circumference, or are equally distributed on different horizontal circumferences.
8. The connecting structure of the casing and the plastic fan blade of the brushless motor according to claim 1, wherein the opening of the side hole is circular, elliptical, rectangular or polygonal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122007112.8U CN215870989U (en) | 2021-08-24 | 2021-08-24 | Connecting structure of brushless motor casing and plastic fan blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122007112.8U CN215870989U (en) | 2021-08-24 | 2021-08-24 | Connecting structure of brushless motor casing and plastic fan blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215870989U true CN215870989U (en) | 2022-02-18 |
Family
ID=80242144
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122007112.8U Active CN215870989U (en) | 2021-08-24 | 2021-08-24 | Connecting structure of brushless motor casing and plastic fan blade |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215870989U (en) |
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2021
- 2021-08-24 CN CN202122007112.8U patent/CN215870989U/en active Active
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