CN218102766U

CN218102766U - Brushless motor fan assembly and brushless motor thereof

Info

Publication number: CN218102766U
Application number: CN202221913365.XU
Authority: CN
Inventors: 徐力; 康义; 徐芩艳
Original assignee: Suzhou Yongbao Electromechanical Technology Co ltd
Current assignee: Suzhou Yongbao Electromechanical Technology Co ltd
Priority date: 2022-07-20
Filing date: 2022-07-20
Publication date: 2022-12-20
Anticipated expiration: 2032-07-20

Abstract

The utility model belongs to the technical field of machinery, a brushless motor fan subassembly and brushless motor thereof is related to, it has solved the brushless motor high grade problem of manufacturing cost of current tape fan. The brushless motor comprises a stator core, a rotor yoke part is rotatably arranged on the stator core, radiating holes communicated with the interior of the brushless motor are formed in the rotor yoke part, and an output shaft is fixed on the outer side of the rotor yoke part; the fan comprises a fan body, wherein a plurality of first through holes are uniformly formed in the edge of the fan body along the circumferential direction, a second through hole communicated with the first through hole is formed in a rotor yoke, threaded holes communicated with the second through hole are formed in the rotor yoke, and bolts are inserted in the first through holes, the second through holes and the threaded holes. When the fan body is installed, the fan body can be directly fixed through the original bolt, the brushless motor and the die are not required to be modified, the original motor can be directly additionally installed, and the production cost is low.

Description

Brushless motor fan assembly and brushless motor thereof

Technical Field

The utility model belongs to the technical field of machinery, a brushless motor fan subassembly and brushless motor thereof is related to.

Background

The brushless motor occupies a large market share in the field of motors, the main reason is that the brushless motor has the functions of energy conservation, stepless speed regulation and forward and reverse rotation, sparks generated by the brush motor during operation can also have an interference effect on electromagnetic elements, in some motor fields, higher requirements are provided for the rotating speed of the brushless motor, but the high rotating speed of the brushless motor is realized while other problems are faced, particularly for the high-power brushless motor, the heat dissipation condition is usually poor, and at present, the measure of adding a heat dissipation fan in the motor is usually adopted for heat dissipation.

Patent CN204928439U discloses a brushless motor with a built-in heat dissipation fan, which solves the problem that heat dissipation can not be performed to the maximum extent, and the dust is often more in the working environment of the motor, so that a large amount of dust enters the motor while heat dissipation, which causes the low running power of the motor. The technical scheme is characterized in that a front end cover and a rear end cover are arranged on two sides of a motor body, the front end cover and the rear end cover are further provided with side end covers coated on the side walls of the motor body, a cooling fan is arranged in the front end cover and rotates along with a motor rotating shaft, the cooling fan comprises a base plate, a plurality of blades are arranged on one side of the base plate, a plurality of reinforcing ribs are uniformly distributed on the other side of the base plate, a plurality of symmetrical notches are formed in the front end cover and the rear end cover, and the length of each notch in each side end cover is larger than or equal to the thickness of the whole cooling fan. The frequency of air exchange is higher, and heat dispersion is better.

However, the fan of the brushless motor is complex to install, the existing motor needs to be greatly improved, even the original motor module needs to be changed more, a new motor module is redesigned, and the cost is high.

SUMMERY OF THE UTILITY MODEL

The utility model aims at having the above-mentioned problem to current technique, provided a brushless motor fan subassembly and brushless motor thereof, the utility model aims to solve the technical problem that: how to reduce the production cost of the motor.

The purpose of the utility model can be realized by the following technical proposal:

a brushless motor fan assembly is characterized in that the fan assembly comprises a fan body, a central through hole is formed in the middle of the fan body, and the output shaft penetrates through the central through hole; the fan comprises a fan body, wherein a plurality of first through holes are uniformly formed in the edge of the fan body along the circumferential direction, a second through hole communicated with the first through holes is formed in a rotor yoke, threaded holes communicated with the second through holes are formed in the rotor yoke, and bolts are inserted into the first through holes, the second through holes and the threaded holes.

The working principle is as follows: the rotor of the brushless motor rotates to drive the fan body to rotate, and the heat dissipation holes are formed in the yoke part of the rotor, so that the brushless motor can be combined with the fan body to achieve a heat dissipation effect. When the fan body is installed, the fan body can be directly fixed through the original bolt, the brushless motor is not required to be improved, and the corresponding brushless motor die is not required to be modified, so that the fan body can be directly additionally installed on the original motor, and the production cost is low.

In foretell brushless motor fan assembly, the output shaft is including being cylindrical axial region and the connecting portion that is the pie, the junction of axial region and connecting portion is provided with the external screw thread, external screw thread department has the spacing ring, the external diameter of spacing ring with the internal diameter of the central through-hole on the fan body is corresponding. After the design has the spacing ring, can select the spacing ring that corresponds according to the central through-hole of different internal diameters to play limiting displacement to the fan body, guarantee the axiality between fan body and the output shaft, reduce the radial effort of bolt to the fan body simultaneously.

In the above brushless motor fan assembly, the fan assembly further includes fan blades uniformly distributed on the periphery of the fan body, and the fan blades are arc-shaped and bent in the same direction. By the design, the heat dissipation effect is good.

In the above brushless motor fan assembly, two sides of a joint between the fan body and the fan blades are arc-shaped and symmetrically distributed. The design can reduce dust adhesion.

The utility model provides a brushless motor, its characterized in that, brushless motor includes stator core, stator, rotor yoke portion, output shaft and above-mentioned fan assembly, the stator is fixed in on the stator core, be provided with the winding coil on the stator core, rotor yoke portion cover is located on the stator core, still be provided with on the rotor yoke portion with winding coil matched with magnet, the output shaft is fixed in on the rotor yoke portion, fan assembly's fan body is fixed in on the output shaft.

The working principle is as follows: the winding coil of the stator of the motor is electrified and matched with the magnet to enable the yoke part of the rotor to rotate, so that the output shaft is driven to rotate, and meanwhile, the fan body is driven to rotate, and the heat dissipation effect is achieved.

In the brushless motor, the stator core is further provided with a fastening nut and a shell, the shell is located between the stator and the fastening nut, the yoke part of the rotor is provided with heat dissipation holes, and the shell is provided with corresponding openings. The heat dissipation holes are formed in the yoke portion of the rotor, the opening is formed in the shell, and when the fan body rotates, heat inside the brushless motor can be taken out to achieve the heat dissipation effect.

Compared with the prior art, the utility model has the advantages of it is following:

when the fan body is installed, the fan body can be directly fixed through the original bolt, the brushless motor is not required to be improved, and the corresponding brushless motor die is not required to be modified, so that the original motor can be directly additionally installed, and the production cost is low.

Drawings

Fig. 1 is a schematic diagram of the conventional structure of the brushless motor.

Fig. 2 is a schematic structural diagram of the brushless motor after the fan assembly is installed.

Fig. 3 is a cross-sectional view of fig. 2.

Fig. 4 is a schematic structural view of the fan assembly.

In the figure, 1, a stator core; 2. a rotor yoke portion; 3. heat dissipation holes; 4. an output shaft; 5. A fan body; 6. a central through hole; 7. a first through hole; 8. a bolt; 9. a limiting ring; 10. a fan blade; 11. a winding coil; 12. a magnet; 13. fastening a nut; 14. a housing; 15. And (4) opening.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1, 2, 3, and 4, the brushless motor includes a stator core 1, a rotor yoke 2 is rotatably disposed on the stator core 1, a heat dissipation hole 3 communicated with the inside of the brushless motor is formed in the rotor yoke 2, and an output shaft 4 is fixed on the outer side of the rotor yoke 2, and the brushless motor is characterized in that the fan assembly includes a fan body 5, a central through hole 6 is formed in the middle of the fan body 5, and the output shaft 4 penetrates through the central through hole 6; a plurality of first through holes 7 are uniformly formed in the edge portion of the fan body 5 along the circumferential direction, a second through hole communicated with the first through hole is formed in the rotor yoke portion 2, threaded holes communicated with the second through hole are formed in the rotor yoke portion 2, and bolts 8 are inserted into the first through holes 7, the second through holes and the threaded holes.

Specifically, the output shaft 4 includes a cylindrical shaft portion and a pie-shaped connecting portion, an external thread is provided at a connection portion of the shaft portion and the connecting portion, a stopper ring 9 is provided at the external thread, and an outer diameter of the stopper ring 9 corresponds to an inner diameter of the central through hole 6 of the fan body 5.

As shown in fig. 1, 2, 3 and 4, the fan assembly further includes fan blades 10 uniformly distributed on the periphery of the fan body 5, and the fan blades 10 are arc-shaped and bent toward the same direction. The two sides of the joint of the fan body 5 and the fan blades 10 are arc-shaped and symmetrically distributed.

As shown in fig. 1, 2, 3 and 4, the brushless motor includes a stator core 1, a stator, a rotor yoke 2, an output shaft 4 and a fan assembly, the stator is fixed on the stator core 1, a winding coil 11 is disposed on the stator core 1, the rotor yoke 2 is sleeved on the stator core 1, a magnet 12 matched with the winding coil 11 is further disposed on the rotor yoke 2, the output shaft 4 is fixed on the rotor yoke 2, and a fan body 5 of the fan assembly is fixed on the output shaft 4. The stator core 1 is further provided with a fastening nut 13 and a shell 14, the shell 14 is located between the stator and the fastening nut 13, the rotor yoke portion 2 is provided with heat dissipation holes 3, and the shell 14 is provided with corresponding openings 15.

The utility model discloses a theory of operation as follows: the winding coil of the stator of the motor is electrified and matched with the magnet to enable the yoke part of the rotor to rotate, so that the output shaft is driven to rotate, and meanwhile, the fan body is driven to rotate, and the heat dissipation effect is achieved.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. A brushless motor fan assembly comprises a stator core (1), wherein a rotor yoke portion (2) is rotatably arranged on the stator core (1), heat dissipation holes (3) communicated with the interior of the brushless motor are formed in the rotor yoke portion (2), and an output shaft (4) is fixed on the outer side of the rotor yoke portion (2), and is characterized in that the fan assembly comprises a fan body (5), a central through hole (6) is formed in the middle of the fan body (5), and the output shaft (4) penetrates through the central through hole (6); the fan comprises a fan body (5), and is characterized in that a plurality of first through holes (7) are uniformly formed in the edge of the fan body (5) along the circumferential direction, a second through hole communicated with the first through holes (7) is formed in a rotor yoke portion (2), threaded holes communicated with the second through holes are formed in the rotor yoke portion (2), and bolts (8) are inserted in the first through holes (7), the second through holes and the threaded holes.

2. The brushless motor fan assembly according to claim 1, wherein the output shaft (4) comprises a cylindrical shaft portion and a pie-shaped connecting portion, wherein an external thread is arranged at the connecting portion of the shaft portion and the connecting portion, a limiting ring (9) is arranged at the external thread, and the external diameter of the limiting ring (9) corresponds to the internal diameter of the central through hole (6) in the fan body (5).

3. The assembly according to claim 2, further comprising fan blades (10) uniformly distributed on the periphery of the fan body (5), wherein the fan blades (10) are arc-shaped and bent in the same direction.

4. The assembly according to claim 3, wherein two sides of the joint between the fan body (5) and the fan blades (10) are arc-shaped and symmetrically distributed.

5. The brushless motor is characterized by comprising a stator core (1), a stator, a rotor yoke (2), an output shaft (4) and the fan assembly as claimed in any one of claims 1 to 4, wherein the stator is fixed on the stator core (1), the stator core (1) is provided with a winding coil (11), the rotor yoke (2) is sleeved on the stator core (1), the rotor yoke (2) is further provided with a magnet (12) matched with the winding coil (11), the output shaft (4) is fixed on the rotor yoke (2), and a fan body (5) of the fan assembly is fixed on the output shaft (4).

6. The brushless motor according to claim 5, wherein the stator core (1) is further provided with a fastening nut (13) and a housing (14), the housing (14) is located between the stator and the fastening nut (13), the rotor yoke (2) is provided with a heat dissipation hole (3), and the housing (14) is provided with a corresponding opening (15).