Direct-current brushless outer rotor motor integrated with axial flow fan blades
By integrating the axial air blade mechanism inside the motor, external air is sucked in and taken away internal heat, the problem of difficulty in dissipating the heat inside the motor is solved, and more efficient heat dissipation and motor performance improvement is achieved.
Patent Information
- Application Number
- CN202421941707.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-12
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-08-12
AI Technical Summary
In existing garden tools, it is difficult to effectively disperse the heat inside the motor. The existing straight-toothed air blades can only dissipate the heat on the surface of the motor. The internal heat needs to be transferred to the surface before it can dissipate heat, resulting in low heat dissipation efficiency.
The DC brushless external rotor motor with integrated axial flow vanes is used to install an axial flow vane mechanism inside the motor, and the motor rotates to suck out external air and take away internal heat, improving the heat dissipation effect.
Effectively improve the heat dissipation effect of the motor, improve working performance, and extend service life.
Smart Images
Figure CN223156882U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a DC brushless outer rotor motor, and particularly to a DC brushless outer rotor motor integrated with an axial flow fan blade. Background Art
[0002] In the prior art, garden tools such as lawn mowers adopt a structure of a fuel engine combined with a brushed inner rotor motor or a DC brushless motor, and their heat dissipation generally uses a conventional straight-tooth fan blade. The heat dissipation principle is to dissipate the heat around the motor through the straight-tooth blades. This structure can only dissipate the heat on the surface of the motor, and the heat generated inside the motor needs to be transferred to the surface of the motor before it can be dissipated through the straight-tooth fan blade. Summary of the Utility Model
[0003] The DC brushless outer rotor motor integrated with an axial flow fan blade proposed by the utility model aims to overcome the above-mentioned deficiencies existing in the prior art, improve the heat dissipation efficiency, and effectively dissipate the heat inside the motor.
[0004] The technical solution of the utility model: The DC brushless outer rotor motor integrated with an axial flow fan blade includes an axial flow fan blade mechanism, a housing, a bracket, magnetic pieces, and a motor shaft. The axial flow fan blade mechanism is installed at one end of the motor shaft. The housing is sleeved at the rear side of the axial flow fan blade mechanism. A bracket is arranged inside the housing. A plurality of magnetic pieces are circumferentially and uniformly fixed between the rear side of the axial flow fan blade mechanism inside the housing and the bracket. When the motor rotates during operation, outside air is inhaled into the motor through the axial flow fan blade mechanism, flows through the inside of the motor and is discharged at the other end, which can take out the heat generated inside the motor, improve the heat dissipation effect, and improve the working efficiency of the motor.
[0005] Preferably, the axial flow fan blade mechanism includes a turntable fixed to one end of the motor shaft through a snap ring. The snap ring is located in the shaft groove at one end of the motor shaft. A plurality of axially spaced axial flow fan blades are integrally formed on the outer circumference of the turntable. An outer frame is integrally formed on the outer circumference of all the axial flow fan blades. A plurality of card slots are circumferentially and uniformly arranged on the outer circumference of the outer frame. The positions of the card slots correspond to the slots on the bracket. A magnetic piece is arranged between each card slot and the corresponding slot on the bracket, and the magnetic piece is pasted on the inner wall of the housing.
[0006] The advantages of the utility model: The structure is reasonably designed. By integrating the axial flow fan blade with the motor structure, the heat generated inside the motor can be directly taken away, the heat dissipation effect can be effectively improved, the excellent working performance of the motor can be ensured, and the service life can be prolonged. Description of the Drawings
[0007] Figure 1 It is a schematic structural diagram of the DC brushless outer rotor motor integrated with an axial flow fan blade of the utility model.
[0008] Figure 2 is Figure 1Partial structural schematic diagram.
[0009] Figure 3 is Figure 2 Another perspective schematic diagram.
[0010] In the figure, 1 is the axial flow fan mechanism, 11 is the axial flow fan, 12 is the turntable, 13 is the outer frame, 14 is the card slot, 15 is the snap ring, 2 is the housing, 3 is the bracket, 4 is the magnetic sheet, and 5 is the motor shaft. Specific implementation manner
[0011] The present utility model will be further described in detail below in conjunction with the embodiments and specific implementation manners.
[0012] As Figures 1-3 shown, a DC brushless outer rotor motor integrated with an axial flow fan, its structure includes an axial flow fan mechanism 1, a housing 2, a bracket 3, a magnetic sheet 4 and a motor shaft 5. The axial flow fan mechanism 1 is installed at one end of the motor shaft 5. The housing 2 is sleeved on the rear side of the axial flow fan mechanism 1. A bracket 3 is arranged inside the housing 2. A plurality of magnetic sheets 4 are circumferentially and uniformly fixed between the rear side of the axial flow fan mechanism 1 inside the housing 2 and the bracket 3.
[0013] According to the above structure, during operation, the motor rotates, sucking outside air into the motor through the axial flow fan mechanism 1, flowing through the inside of the motor and discharging at the other end. During this process, the air takes out the heat generated inside the motor, which can timely dissipate the temperature generated during the operation of the motor, improve the heat dissipation effect, and improve the working efficiency of the motor.
[0014] The axial flow fan mechanism 1 is made of aluminum, and includes a turntable 12 fixed to one end of the motor shaft 5 through a snap ring 15. The snap ring 15 is located in the shaft groove at one end of the motor shaft 5. A plurality of axially spaced axial flow fans 11 are integrally formed on the outer circumference of the turntable 12. An outer frame 13 is integrally formed on the outer circumference of all the axial flow fans 11. A plurality of card slots 14 are circumferentially and uniformly arranged on the outer circumference of the outer frame 13. The positions of the card slots 14 correspond to the slots on the bracket 3. A magnetic sheet 4 is arranged between each card slot 14 and the corresponding slot on the bracket 3. The magnetic sheet 4 is pasted on the inner wall of the housing 2 as a permanent magnet.
[0015] The snap ring 1 is used to ensure that the motor shaft 5 does not move axially during the rotation of the motor.
[0016] During installation, the housing 2 and the axial flow fan mechanism 1 are concentrically and press-fitted. The axial flow fan mechanism 1 provides a supporting effect with a certain strength to ensure that the housing 2 and the motor shaft 5 are on the same axis.
[0017] The magnetic discs 4 are preferably 20 high-performance rare-earth-containing sintered neodymium iron boron magnets, which are strongly and evenly pasted on the inner wall surface of the casing 2 to provide a certain thrust adhesion strength; and are further fixed and strengthened by the bracket 3 to further ensure that the magnetic discs 4 are evenly distributed on the inner wall surface of the casing 2, and at the same time play a role in fixing the magnetic discs 4 to prevent movement.
[0018] The motor shaft 5, the casing 2, the axial flow fan mechanism 1, and the magnetic discs 4 are interconnected to form a reliable rotating body, which is the rotor assembly. In actual production, a dynamic balance process should be carried out to remove the unbalance generated during the assembly of the rotor assembly due to the fit, and to ensure that the motor has no vibration phenomenon during full-speed rotation.
[0019] The above-mentioned components are all prior arts, and those skilled in the art can use any models and existing designs that can achieve their corresponding functions.
[0020] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the creative concept of the present invention, several deformations and improvements can be made, and these all belong to the protection scope of the present invention.
Claims
1. The DC brushless outer rotor motor integrated with an axial flow fan blade is characterized in that, It includes an axial flow fan blade mechanism (1), a housing (2), a bracket (3), a magnetic sheet (4) and a motor shaft (5). The axial flow fan blade mechanism (1) is installed at one end of the motor shaft (5). The housing (2) is sleeved on the rear side of the axial flow fan blade mechanism (1). A bracket (3) is arranged inside the housing (2). A plurality of magnetic sheets (4) are circumferentially and uniformly fixed between the rear side of the axial flow fan blade mechanism (1) inside the housing (2) and the bracket (3).
2. The DC brushless outer rotor motor integrated with an axial flow fan blade as claimed in claim 1, wherein The described axial flow fan blade mechanism (1) includes a turntable (12) fixed to one end of the motor shaft (5) through a circlip (15). The circlip (15) is located in the shaft groove at one end of the motor shaft (5). A plurality of axially spaced axial flow fan blades (11) are integrally formed on the outer circumference of the turntable (12). An outer frame (13) is integrally formed on the outer extensions of all the axial flow fan blades (11). A plurality of card slots (14) are circumferentially and uniformly arranged on the outer extension of the outer frame (13). The positions of the card slots (14) correspond to the positions of the slots on the bracket (3). A magnetic sheet (4) is arranged between each card slot (14) and the corresponding slot on the bracket (3). The magnetic sheet (4) is pasted on the inner wall of the housing (2).