CN211670726U

CN211670726U - Brushless motor

Info

Publication number: CN211670726U
Application number: CN202020473596.8U
Authority: CN
Inventors: 王洪刚
Original assignee: Ningbo Fujia Industrial Co Ltd
Current assignee: Ningbo Fujia Industrial Co Ltd
Priority date: 2020-04-03
Filing date: 2020-04-03
Publication date: 2020-10-13
Anticipated expiration: 2030-04-03

Abstract

The utility model relates to the technical field of electric machines, especially, relate to a brushless motor. Including end cover (3), casing (6) and rotor (5) of setting in casing (6), rotor (5) are close to end cover (3) pot head and are equipped with movable vane wheel (2), be equipped with first seal structure between movable vane wheel (2) and end cover (3), set up second seal structure between end cover (3) and casing (6). The dry and wet dust collector adopting the brushless motor has longer service life.

Description

Brushless motor

Technical Field

The utility model relates to the technical field of electric machines, especially, relate to a brushless motor.

Background

The dry and wet dual-purpose dust collector is a cleaning device which can absorb dust and sewage, is widely applied and is a common cleaning device at present. The motor is an important component of the wet and dry dust collector.

However, the sealing effect of the motor in the prior art is poor, so that air with water vapor sucked by the dry and wet dual-purpose dust collector easily enters the motor, metal parts such as a bearing in the motor are affected, and the normal work of the motor is further affected.

Disclosure of Invention

The utility model discloses the technical problem that will solve is: the brushless motor with better sealing performance is provided, and the dry and wet dust collector adopting the brushless motor has longer service life.

The utility model adopts the technical proposal that: the brushless motor comprises an end cover, a casing and a rotor arranged in the casing, wherein a movable impeller is sleeved on the end of the rotor close to the end cover, a first sealing structure is arranged between the movable impeller and the end cover, and a second sealing structure is arranged between the end cover and the casing.

Preferably, the first sealing structure comprises a circle of first limiting protrusion and a circle of first limiting groove which are arranged between the movable impeller and the end cover, and the first limiting protrusion is matched with the first limiting groove.

Preferably, the second sealing structure comprises a circle of second limiting protrusion and a circle of second limiting groove which are arranged between the end cover and the casing, and the second limiting protrusion is matched with the second limiting groove.

Preferably, the cooling fan rotor further comprises a circuit board, one end, far away from the end cover, of the rotor is further sleeved with a cooling fan blade, and the circuit board is located on one side, far away from the rotor, of the cooling fan blade.

Preferably, the end cover comprises an outer shell and an inner shell, a plurality of first blades are arranged between the outer shell and the inner shell, the plurality of first blades are arranged in a circumferential inclined mode, and the outer shell, the inner shell and the first blades are integrally formed.

Preferably, the movable impeller comprises an upper assembly and a lower assembly, the upper assembly is provided with an air inlet, a plurality of second blades are arranged between the upper assembly and the lower assembly along the circumference, the second blades are arc-shaped, and the upper assembly, the lower assembly and the second blades are integrally formed.

Compared with the prior art in the structure more than adopting, the utility model has the advantages of it is following: set up first seal structure between end cover and movable vane, set up second seal structure between end cover and casing for brushless motor whole leakproofness is higher, is difficult to enter into in the casing from the external inspiratory air of taking steam like this.

By adopting the structure as a sealing structure, the structure is simple, and the sealing effect is good.

The circuit board is arranged on one side of the cooling fan blade, which is far away from the rotor, so that the air sucked out of the casing by the cooling fan blade can be blown onto the circuit board, which is equivalent to heat dissipation of the circuit board.

The end cover is arranged in the structure, so that wind resistance and turbulence loss can be effectively reduced, and the static pressure conversion rate of the fan can be improved.

The movable impeller is arranged in the structure, so that the wind resistance can be effectively reduced.

Drawings

Fig. 1 is a schematic structural diagram of the brushless motor of the present invention.

Fig. 2 is an exploded view of the brushless motor of the present invention.

Fig. 3 is a sectional view of the brushless motor of the present invention.

Fig. 4 is a schematic structural diagram of a movable impeller in the brushless motor of the present invention.

Fig. 5 is a schematic structural diagram of a view angle of the end cap of the brushless motor according to the present invention.

Fig. 6 is a schematic structural diagram of another view angle of the end cap of the brushless motor according to the present invention.

Fig. 7 is a schematic structural diagram of a casing of the brushless motor according to the present invention.

As shown in the figure: 1. a fan housing; 2. a movable impeller; 3. an end cap; 4. a stator; 5. a rotor; 6. a housing; 7. cooling the fan blades; 8. a circuit board; 9. a first limit protrusion; 10. a first limit groove; 11. a second limit bulge; 12. a second limit groove; 13. a housing; 14. an inner shell; 15. a first blade; 16. an upper assembly; 17. a lower assembly; 18. a second blade.

Detailed Description

The present invention will be further described below with reference to specific embodiments, but the present invention is not limited to the following specific embodiments.

The first embodiment is as follows: the utility model provides a brushless motor, be used for wet dual-purpose dust catcher futilely, include fan housing 1 in proper order, movable vane wheel 2, end cover 3, stator 4, rotor 5, casing 6, cooling blade 7 and circuit board 8, wherein stator 4 cover is established at rotor 5 middle part, and stator 4 and rotor 5 all set up between end cover 3 and

casing

6, 2 covers of movable vane wheel are established and are close to 3 one end of end cover at rotor 5, and movable vane wheel 2 sets up between end cover 3 and

fan housing

1, 7 covers of cooling blade are established and are kept away from 3 one end of end cover at rotor 5, and cooling blade 7 sets up between casing 6 and circuit board 8, wherein:

the end cover 3 comprises an inner shell 14 and an outer shell 13, a through hole for the rotor 5 to extend out is formed in the middle of the inner shell 14, the rotor 5 extends out from the through hole to be sleeved with the movable impeller 2, a circle of first limiting groove 10 is formed in the circumference of the upper end face of the inner shell 14, a circle of second limiting protrusion 11 is formed in the circumference of the lower end face of the inner shell 14, a plurality of inclined first blades 15 are uniformly arranged between the inner shell 14 and the outer shell 13, in the specific embodiment, the number of the first blades 15 is 9, and the inner shell 14, the outer shell 13 and the first blades 15 are integrally formed by injection molding;

the movable impeller 2 comprises an upper component 16 and a lower component 17, the upper component 16 is provided with an air inlet matched with the fan cover 1, the lower component 17 is provided with a through hole for the rotor 5 to pass through, a plurality of second blades 18 are uniformly arranged on the circumference between the upper component 16 and the lower component 17, the second blades 18 are arc-shaped, the upper component 16, the lower component 17 and the second blades 18 are integrally molded by injection, the circumference of the lower component 17 is flanged downwards to form a circle of first limiting bulges 9, the first limiting bulges 9 can be embedded into first limiting grooves 10, the first limiting bulges 9 and the first limiting grooves 10 can be directly clamped in an interference fit manner, the size of the first limiting grooves 10 is slightly larger than that of the first limiting bulges 9, and after the first limiting bulges 9 are embedded into the first limiting grooves 10, the rest part is filled with sealant or sealed by EVA;

the casing 6 comprises an external casing and an internal rotor 5 seat, a circle of second limiting groove 12 is arranged on the circumference of the upper end of the casing, a second limiting protrusion 11 can be embedded into the second limiting groove 12, the second limiting protrusion and the second limiting groove can be in interference fit and directly clamped, or the size of the second limiting groove 12 is slightly larger than that of the second limiting protrusion 11, and after the second limiting protrusion 11 is embedded into the second limiting groove 12, the rest part is filled with sealant or sealed by EVA;

the lower part of a rotor 5 seat in the casing 6 is provided with an accommodating space for arranging a cooling fan blade 7, the rotor 5 passes through a through hole on the rotor 5 seat and extends into the accommodating space, and the cooling fan blade 7 is arranged in the accommodating space and then sleeved at the end of the rotor 5 extending from the accommodating space;

the circuit board 8 is arranged at one end of the machine shell 6 far away from the end cover 3 through a mounting part, and parts which generate more heat, such as MOS (metal oxide semiconductor) tubes, on the circuit board 8 are opposite to the cooling fan blades 7;

the working principle of the movable impeller 2 is as follows: the rotor 5 drives the movable impeller 2 to rotate, so that suction force is generated, external air is sucked from an air inlet of the fan cover 1 connected with the movable impeller 2, then the external air passes through the blades of the driven impeller 2 and then passes through the blades of the end cover 3 to realize air outflow, and because the movable impeller 2 and the end cover 3 are sealed once, the air sucked by the movable impeller 2 cannot flow to a through hole of the end cover 3 from the seal between the driven impeller 2 and the end cover 3 and then enter the end cover 3 and the shell 6, and because the end cover 3 and the shell 6 are also sealed once, the air cannot flow into the space between the end cover 3 and the shell 6 after flowing out from the blades of the end cover 3, so that the air with water vapor sucked from the outside can only flow outside the end cover 3 and the shell 6 and cannot flow into the end cover 3 and the shell 6, and the phenomenon of poor insulation of the motor cannot occur, the circuit board 8 and the bearing are not damaged, and the metal is not easy to rust.

The rotor 5 drives the cooling fan blades 7 to rotate, so that suction force can be generated, air in the end cover 3 and the shell 6 is sucked out, the sucked air can be blown onto the circuit board 8, and heat dissipation of the circuit board 8 is achieved.

The second embodiment is as follows: the difference from the first embodiment is that: in the second embodiment, the positions of the convex grooves between the movable impeller 2 and the end cover 3 are exchanged with those of the first embodiment, and similarly, the positions of the convex grooves between the end cover 3 and the casing 6 are also exchanged with those of the first embodiment, and the exchange of the positions does not affect the sealing effect of the convex grooves.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. The utility model provides a brushless motor, includes end cover (3), casing (6) and sets up rotor (5) in casing (6), rotor (5) are close to end cover (3) pot head and are equipped with movable vane wheel (2), its characterized in that: a first sealing structure is arranged between the movable impeller (2) and the end cover (3), and a second sealing structure is arranged between the end cover (3) and the casing (6).

2. The brushless electric machine according to claim 1, wherein: the first sealing structure comprises a circle of first limiting protrusion (9) and a circle of first limiting groove (10) which are arranged between the movable impeller (2) and the end cover (3), and the first limiting protrusion (9) is matched with the first limiting groove (10).

3. The brushless electric machine according to claim 1, wherein: the second sealing structure comprises a circle of second limiting protrusion (11) and a circle of second limiting groove (12) which are arranged between the end cover (3) and the casing (6), and the second limiting protrusion (11) is matched with the second limiting groove (12).

4. The brushless electric machine according to claim 1, wherein: the novel motor rotor structure is characterized by further comprising a circuit board (8), wherein one end, far away from the end cover (3), of the rotor (5) is further sleeved with a cooling fan blade (7), and the circuit board (8) is located on one side, far away from the rotor (5), of the cooling fan blade (7).

5. The brushless electric machine according to claim 1, wherein: the end cover (3) comprises an outer shell (13) and an inner shell (14), a plurality of first blades (15) are arranged between the outer shell (13) and the inner shell (14), the first blades (15) are obliquely arranged along the circumferential direction, and the outer shell (13), the inner shell (14) and the first blades (15) are integrally formed.

6. The brushless electric machine according to claim 1, wherein: the movable impeller (2) comprises an upper assembly (16) and a lower assembly (17), the upper assembly (16) is provided with an air inlet, a plurality of second blades (18) are arranged between the upper assembly (16) and the lower assembly (17) along the circumference, the second blades (18) are arc-shaped, and the upper assembly (16), the lower assembly (17) and the second blades (18) are integrally formed.