CN111628584A

CN111628584A - Dust collector motor and assembling method thereof

Info

Publication number: CN111628584A
Application number: CN202010567682.XA
Authority: CN
Inventors: 不公告发明人
Original assignee: Kada Micromotor Manufacturing Co ltd
Current assignee: Kada Micromotor Manufacturing Co ltd
Priority date: 2020-06-19
Filing date: 2020-06-19
Publication date: 2020-09-04

Abstract

The invention discloses a dust collector motor and an assembly method thereof.A stator assembly of the dust collector motor comprises a stator core formed by splicing at least three stator blocks, an insulating framework and a winding; the end of the insulating framework, which is provided with the terminal, is provided with a first fixing part for fixing the circuit board, and the projections of the first fixing part are all positioned in an area surrounded by the motor shell along the axial direction of the dust collector motor; the fixed impeller of the dust collector motor comprises a guide vane, an outer annular wall connected with the outer end of the guide vane, an inner annular wall connected with the inner end of the guide vane, a central hole and a second fixing part arranged between the inner annular wall and the central hole and used for fixing a motor shell; along the axial direction of the dust collector motor, the projections of the motor shell are all positioned in the area enclosed by the inner ring wall. The motor air duct of the dust collector provided by the invention has no other parts except the guide vanes, so that the kinetic energy loss in the air flow flowing process is reduced, the efficiency of the motor of the dust collector can be improved, and the noise is reduced.

Description

Dust collector motor and assembling method thereof

Technical Field

The invention relates to the technical field of dust collectors, in particular to a motor of a dust collector. In addition, the invention also relates to an assembly method suitable for the motor of the dust collector.

Background

In the prior art, a dust collector motor generally adopts an injection molding shell, a front bearing chamber and a stator assembly are both arranged on the shell, a circuit board is fixed on the shell or a rear bracket, the rear bracket is fixed on the shell, and the stator needs laser welding connection in the assembling process, so that an insulating layer on the surface of a silicon steel sheet can be damaged in the welding process, certain iron loss and magnetic loss are caused, the motor efficiency is reduced, and the energy loss is increased; in addition, the circuit board is fixed on the shell or the rear bracket, and a plurality of supporting structures arranged in the air duct can be generated, so that the number of parts in the air duct is increased, the normal flow of air flow in the air duct is influenced, the efficiency of the motor is reduced, and meanwhile, the supporting structures can generate noise in the process that the air flow in the air duct flows through the supporting structures; the circuit board is arranged on the rear support, and the fixing constraint of the rear support is influenced.

In summary, a need exists in the art to provide a vacuum cleaner motor with improved efficiency.

Disclosure of Invention

In view of the above, an object of the present invention is to provide a motor for a vacuum cleaner, in which no supporting structure or connecting structure is provided in the air duct except for the guide vanes, so that air can flow smoothly in the air duct, the efficiency of the motor is improved, and noise can be reduced.

Another object of the present invention is to provide an assembly method suitable for the above-mentioned cleaner motor.

In order to achieve the above purpose, the invention provides the following technical scheme:

a cleaner motor, comprising: the motor comprises a motor shell, a stator component, a rotor component, a fixed impeller, a movable impeller, a circuit board, a fan cover and a rear cover; the stator assembly comprises a stator core formed by splicing at least three stator blocks, an insulation framework inserted in the stator core and a winding wound outside the insulation framework; a first fixing part for fixing the circuit board is arranged at one end of the insulating framework, which is provided with the terminal, and the projections of the first fixing part are all positioned in an area surrounded by the motor shell along the axial direction of the dust collector motor;

the fixed impeller comprises a guide vane, an outer ring wall connected with the outer end of the guide vane, an inner ring wall connected with the inner end of the guide vane, a central hole for positioning the rotor assembly and a second fixing part arranged between the inner ring wall and the central hole, wherein the second fixing part is used for fixing the motor shell;

along the axial direction of the dust collector motor, the projections of the motor shell are all positioned in the area enclosed by the inner ring wall.

Preferably, the second fixing portion is first threaded holes uniformly distributed along the circumferential direction of the inner ring wall, and the number of the first threaded holes is at least two.

Preferably, the first fixing part is a boss which protrudes from the upper surface of the insulating framework, a second threaded hole is formed in the boss, and the circuit board is provided with a through hole matched with the second threaded hole.

Preferably, the insulation frame includes an upper frame inserted from an upper portion of the stator block and a lower frame inserted from a lower portion of the stator block, and the boss is disposed on an upper surface of the upper frame.

Preferably, the motor housing is a metal housing.

Preferably, two circumferential sides of any stator block are provided with first grooves or protrusions used for being matched with adjacent stator blocks.

Preferably, the rotor assembly comprises a rotor shaft, a magnet, a bearing, a wave-shaped elastic sheet and a rear support, the bearing is sleeved on the rotor shaft and is in interference fit with the rotor shaft, and the rear support is made of metal.

A method of assembly comprising:

assembling a stator assembly;

loading the stator assembly into a motor housing;

assembling a rotor assembly;

loading the rotor assembly into the motor housing with the stator assembly installed;

connecting a fixed impeller with the motor shell, wherein the motor shell is arranged on the inner side of the inner annular wall;

installing a movable impeller and a fan cover;

mounting the circuit board on the insulating framework;

and (7) mounting a rear cover.

Preferably, said assembling said stator assembly comprises:

installing an insulating framework on the stator block;

winding a wire outside the insulating framework to form a winding, and mounting a terminal;

at least three stator blocks are arranged in a splicing mode.

Preferably, the assembling the stator assembly into the motor housing includes:

a stator core in the stator assembly is in interference fit with the motor shell;

or the stator core in the stator component is in clearance fit with the motor shell and is adhered to the motor shell through an adhesive.

The invention provides a motor of a dust collector, comprising: the motor comprises a motor shell, a stator component, a rotor component, a fixed impeller, a movable impeller, a circuit board, a fan cover and a rear cover; the stator assembly comprises a stator core formed by splicing at least three stator blocks, an insulation framework inserted in the stator core and a winding wound outside the insulation framework; the end of the insulating framework, which is provided with the terminal, is provided with a first fixing part for fixing the circuit board, and the projections of the first fixing part are all positioned in an area surrounded by the motor shell along the axial direction of the dust collector motor; the fixed impeller comprises a guide vane, an outer ring wall connected with the outer end of the guide vane, an inner ring wall connected with the inner end of the guide vane, a central hole for positioning the rotor assembly and a second fixing part arranged between the inner ring wall and the central hole, wherein the second fixing part is used for fixing the motor shell; along the axial direction of the dust collector motor, the projections of the motor shell are all positioned in the area enclosed by the inner ring wall.

Compared with the prior art, the circuit board in the motor of the dust collector is connected with the insulating framework, and the projections of the first fixing parts are all positioned in the space enclosed by the motor shell, so that the stator assembly is completely positioned in the motor shell, and a structure which extends out of the motor shell and occupies the air duct space does not exist; in addition, the motor is connected with a second fixing part arranged between the inner ring wall and the central hole in the installation process, and the motor shell is completely positioned in a space surrounded by the inner ring wall, so that the arrangement of a supporting structure for connecting the outer ring wall of the fixed impeller and the inner ring wall is reduced, and other parts except guide vanes are not arranged in the air duct, therefore, the air flow can smoothly flow in the air duct, the kinetic energy loss in the air flow flowing process is reduced, and the efficiency of the motor of the dust collector can be improved; in addition, the air flow only contacts with the guide vanes in the air duct in the flowing process, so that the noise is reduced.

In addition, the invention also provides an assembly method suitable for the motor of the dust collector.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic structural view of an insulating framework inserted in a stator block in the assembly process of a motor of a dust collector provided by the invention;

FIG. 2 is a schematic view of the structure of FIG. 1 after the terminal is mounted thereon;

FIG. 3 is a schematic view of the structure of FIG. 2 after the structure is assembled into a whole;

FIG. 4 is a schematic view of the structure of FIG. 3 mounted to a motor housing;

FIG. 5 is a schematic view of the structure of FIG. 4 with the rotor assembly installed;

FIG. 6 is a schematic structural view of the structure of FIG. 5 with the impeller mounted thereon;

FIG. 7 is a schematic structural view of the structure of FIG. 6 after the movable impeller is installed;

FIG. 8 is a schematic structural view of the structure of FIG. 7 after the wind shield is installed;

FIG. 9 is a schematic diagram of the structure of FIG. 8 after mounting a circuit board thereon;

FIG. 10 is a schematic view of the structure of FIG. 9 with a rear cover installed;

FIG. 11 is an exploded view of a stator assembly in the vacuum motor provided by the present invention;

FIG. 12 is an exploded view of a rotor assembly in the motor of the vacuum cleaner provided in the present invention;

FIG. 13 is a schematic cross-sectional view of a stator block;

FIG. 14 is a schematic structural view of a fixed impeller;

fig. 15 is a flow chart illustrating an assembly method according to the present invention.

In FIGS. 1-15:

1 is a stator component, 11 is a stator core, 111 is a first groove, 112 is a protrusion, 12 is an insulating framework, 121 is an upper framework, 121a is a boss, 122 is a lower framework, 13 is a winding, 14 is a terminal, 2 is a rotor component, 21 is a rotor shaft, 22 is a magnet, 23 is a bearing, 24 is a wave-shaped elastic sheet, 25 is a rear support, 3 is a motor shell, 4 is a fixed impeller, 41 is a positioning ring, 42 is a second groove, 43 is a second fixing part, 5 is a movable impeller, 6 is a fan cover, 7 is a circuit board, 8 is a rear cover, and d is an offset of the circle center of a tooth shoe relative to the circle center of an iron yoke towards a direction far away from the iron yoke.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The core of the invention is to provide a dust collector motor, wherein a circuit board is connected with an insulating framework, and a motor shell is arranged in an area enclosed by an inner ring wall, so that no other structure is arranged in an air duct except for a guide vane, airflow can smoothly flow in the air duct, the efficiency of the motor is improved, and the noise can be reduced. The other core of the invention is to provide an assembly method suitable for the motor of the dust collector.

Please refer to fig. 1-15.

This concrete embodiment provides a dust catcher motor, includes: the motor comprises a motor shell 3, a stator component 1, a rotor component 2, a fixed impeller 4, a movable impeller 5, a circuit board 7, a fan cover 6 and a rear cover 8; the stator assembly 1 comprises a stator core 11 formed by splicing at least three stator blocks, an insulating framework 12 inserted in the stator core 11 and a winding 13 wound outside the insulating framework 12; one end of the insulating framework 12, which is provided with the terminal 14, is provided with a first fixing part for fixing the circuit board 7, and the projections of the first fixing part are all positioned in the area surrounded by the motor shell 3 along the axial direction of the dust collector motor; the fixed impeller 4 comprises a guide vane, an outer ring wall connected with the outer end of the guide vane, an inner ring wall connected with the inner end of the guide vane, a central hole for positioning the rotor assembly 2 and a second fixing part 43 arranged between the inner ring wall and the central hole, wherein the second fixing part 43 is used for fixing the motor shell 3; along the axial direction of the dust collector motor, the projections of the motor shell 3 are all positioned in the area enclosed by the inner ring wall.

It should be noted that, in the assembly process, the circuit board 7 needs to be connected to the terminal 14, so that the first fixing portion is disposed at the end of the insulating framework 12 where the terminal 14 is disposed, and along the axial direction of the vacuum cleaner motor, the projection of the first fixing portion is located in the area surrounded by the motor housing 3, that is, the first fixing portion does not extend out of the motor housing 3, and does not occupy the air duct space, and the air duct is a space formed between the inner annular wall and the outer annular wall.

The insulating firmware can be integral type structure, also can be split type structure, and specific according to actual conditions confirms, does not do the repeated description here, and is preferred, and insulating skeleton 12 adopts V0 level plastic material, and insulating skeleton 12 and stator piece clearance fit.

Preferably, in order to further improve the magnetic circuit effect of the motor, the center of a circle at the tooth shoe of the stator block may be offset downward relative to the center of a circle of the outer ring of the iron yoke, where the offset is d, and d is an offset of the center of the tooth shoe relative to the center of the iron yoke in a direction away from the iron yoke, and specifically may be 0.2mm to 2 mm.

Compared with the prior art, the circuit board 7 in the motor of the dust collector provided by the embodiment is connected with the insulating framework 12, and the projections of the first fixing parts are all positioned in the space surrounded by the motor shell 3, so that the stator assembly 1 is completely positioned in the motor shell 3, and a structure which extends out of the motor shell 3 and occupies the air duct space does not exist; in addition, the motor is connected with a second fixing part 43 arranged between the inner ring wall and the central hole in the installation process, and the motor shell 3 is completely positioned in the space surrounded by the inner ring wall, so that the arrangement of a supporting structure for connecting the outer ring wall and the inner ring wall of the fixed impeller 4 is reduced, and other parts except guide vanes are not arranged in the air duct, therefore, the air flow can smoothly flow in the air duct, the kinetic energy loss in the air flow flowing process is reduced, and the efficiency of the motor of the dust collector can be improved; in addition, the air flow only contacts with the guide vanes in the air duct in the flowing process, so that the noise is reduced.

On the basis of the above embodiment, the second fixing portions 43 may be provided as first threaded holes evenly distributed in the circumferential direction of the inner ring wall, and the number of the first threaded holes is at least two.

Preferentially, can mould plastics formula structure as an organic whole with the outer rampart of stator with the stay, compare in split type setting, can reduce the manufacturing cost of product and the administrative cost of material to the backward flow that the fluid that has reduced split type to lead to formed in the stator, thereby improved the efficiency of motor.

Preferably, the number of the guide vanes is 13, and the guide vanes are uniformly distributed along the circumferential direction of the outer ring wall.

It should be noted that, for convenience of installation, the height of the outer annular wall is higher than that of the inner annular wall, and three second grooves 42 for positioning the rear bracket 25 are provided at one end of the outer annular wall away from the second fixing portion 43, and the second grooves 42 are uniformly distributed along the circumferential direction of the outer annular wall.

Preferably, the motor housing 3 is connected to the stator vane wheel 4 by 3 screws M3 × 6.

Preferably, a positioning ring 41 for positioning and installing the motor housing may be provided on the inner annular wall of the fixed impeller 4, and the positioning ring 41 is provided on the upper portion of the inner annular wall.

On the basis of the above embodiment, the first fixing portion may be a boss 121a protruding from the upper surface of the insulating skeleton 12, a second threaded hole is formed in the boss 121a, and the circuit board 7 is provided with a through hole matching with the second threaded hole.

In the process of fixing the circuit board 7, the terminals 14 are first inserted into the corresponding connection holes in the circuit board 7, and then the second screw holes are made to correspond to the through holes so that the fastening screws are fitted through the through holes to the second screw holes.

Preferably, the boss 121a is a cylindrical boss 121 a.

Preferably, the insulating bobbin 12 may be provided in a split structure including an upper bobbin 121 inserted from an upper portion of the stator block and a lower bobbin 122 inserted from a lower portion of the stator block, and the boss 121a is provided on an upper surface of the upper bobbin 121.

On the basis of the embodiment, can set up motor housing 3 into metal casing, can be for the iron material, at the in-process that uses, metal casing's thermal diffusivity is better than in plastic casing, and the magnetic permeability improves moreover, can effectively reduce the magnetic leakage.

In the assembling process, the stator assembly 1 and the motor housing 3 can be in interference fit or clearance fit, and when the stator assembly 1 is in clearance fit, the stator assembly 1 needs to be adhered to the motor housing 3 through an adhesive.

Since the stator core 11 is formed by splicing at least three stator pieces, first grooves 111 or protrusions 112 for matching with adjacent stator pieces can be arranged on both sides of the circumference of any stator piece.

Specifically, the first groove 111 or the protrusion 112 may be disposed on two circumferential sides of an iron yoke of a stator piece, only the first groove 111 or only the protrusion 112 may be disposed in the same stator piece, or the first groove 111 may be disposed on one side and the protrusion 112 may be disposed on the other side, which need to be disposed in cooperation with an adjacent stator piece.

As shown in fig. 12, the rotor assembly 2 includes a rotor shaft 21, a magnet 22, a bearing 23, a wave-shaped elastic sheet 24 and a rear bracket 25, and in the assembling process, the rotor shaft 21 and the magnet 22 can be in clearance fit and are connected by adhesive, the bearing 23 and the rear bearing are in interference fit, the wave-shaped elastic sheet 24 is freely placed in a rear bearing chamber and is in clearance fit, and the bearing 23 and the bearing chamber are in clearance fit and are connected by adhesive.

Preferably, the rear bracket 25 can be set to be the rear bracket 25 made of metal, the rear bracket 25 made of metal has good heat dissipation performance, and the heat dissipation effect of the motor can be further improved.

Preferably, the movable impeller 5 is made of an aluminum alloy material, the movable impeller 5 and the rotor shaft 21 may be in clearance fit or interference fit, and when in clearance fit, the movable impeller 5 and the rotor shaft need to be connected through connecting pieces such as connecting screws; the motor shell 3 is made of SECD material or other materials with the same grade, the fan cover 6 is made of engineering plastics or other materials with the same grade, the rear cover 8 mainly serves to protect the circuit board 7, and the rear cover 8 is made of engineering plastics or other materials with the same grade.

It should be noted that the vacuum cleaner motor provided in this document is a high-speed motor, the rotation speed can be 35000rpm-100000rpm, the power is 40W-140W, and the vacuum cleaner motor can be adjusted according to the requirement, and has the characteristics of high efficiency, long service life, and small volume, in the aspect of heat dissipation of the bearing 23, the thermal conductivity coefficient of the plastic is 0.2-0.25, and the thermal conductivity coefficient of the galvanized plate is 36-54, which is more than 200 times that of the plastic, and can effectively help the bearing 23 to dissipate heat.

The first and

second recesses

111 and 42, and the first and

second fixing portions

43 and 43 mentioned in the present document are only for distinguishing the difference of the positions and are not in sequence.

In addition to the above-described cleaner motor, the present invention also provides an assembling method applicable to the cleaner motor disclosed in the above-described embodiment, the assembling method including:

step S1, the stator assembly 1 is assembled.

The step S1 includes:

in step S11, the insulating bobbin 12 is mounted on the stator block.

In step S11, it is necessary to insert upper frame 121 into the stator piece from the upper portion of the stator piece and insert lower frame 122 into the stator piece from the lower portion of the stator piece.

In step S12, the winding 13 is formed by winding wire on the outside of the insulating bobbin 12, and the terminal 14 is mounted.

The winding 13 is formed by winding an enameled wire, the winding 13 is connected to the terminal 14, and the terminal 14 can be fixed to the upper frame 121.

And step S13, splicing at least three stator blocks.

In the process of splicing the stator blocks, laser welding is not needed, positioning can be performed through the first groove 111 and the protrusion 112, and other positioning modes can be used, and the positioning mode is determined according to actual conditions.

Step S2, the stator assembly 1 is installed in the motor housing 3.

In the step S2, the stator core 11 in the stator assembly 1 and the motor housing 3 may be in interference fit; or the stator core 11 in the stator assembly 1 is in clearance fit with the motor housing 3 and is adhered to the motor housing 3 through an adhesive.

Step S3, the rotor assembly 2 is assembled.

Step S4, the rotor assembly 2 is fitted into the motor housing 3 on which the stator assembly 1 is mounted.

In step S5, the fixed impeller 4 is connected to the motor housing 3, and the motor housing 3 is disposed inside the inner annular wall.

In step S6, the impeller 5 and the fan cover 6 are mounted.

In step S7, the circuit board 7 is mounted on the insulating frame 12.

During the mounting of the circuit board 7, the circuit board 7 needs to be connected to the first fixing portion by a fastener.

In step S8, the rear cover 8 is attached.

The main function of the rear cover 8 is to protect the circuit board 7 from being damaged when the circuit board 7 is exposed to the outside.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. Any combination of all embodiments provided by the present invention is within the scope of the present invention, and will not be described herein.

The present invention provides a motor for a cleaner and an assembling method thereof. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims

1. A cleaner motor, comprising: the motor comprises a motor shell (3), a stator assembly (1), a rotor assembly (2), a fixed impeller (4), a movable impeller (5), a circuit board (7), a fan cover (6) and a rear cover (8); it is characterized in that the preparation method is characterized in that,

the stator assembly (1) comprises a stator core (11) formed by splicing at least three stator blocks, an insulating framework (12) inserted into the stator core (11) and a winding (13) wound outside the insulating framework (12); one end of the insulating framework (12) provided with the terminal (14) is provided with a first fixing part for fixing the circuit board (7), and projections of the first fixing part are all positioned in an area surrounded by the motor shell (3) along the axial direction of the dust collector motor;

the fixed impeller (4) comprises a guide vane, an outer ring wall connected with the outer end of the guide vane, an inner ring wall connected with the inner end of the guide vane, a central hole for positioning the rotor assembly (2) and a second fixing part (43) arranged between the inner ring wall and the central hole, wherein the second fixing part (43) is used for fixing the motor shell (3);

along the axial direction of the dust collector motor, the projections of the motor shell (3) are all positioned in the area enclosed by the inner annular wall.

2. The motor for a vacuum cleaner as claimed in claim 1, wherein the second fixing portion (43) is a first threaded hole uniformly distributed along a circumferential direction of the inner annular wall, and the number of the first threaded holes is at least two.

3. The motor for vacuum cleaner as claimed in claim 1, wherein the first fixing portion is a boss (121a) protruding from the upper surface of the insulating frame (12), the boss (121a) has a second threaded hole therein, and the circuit board (7) has a through hole for engaging with the second threaded hole.

4. The cleaner motor according to claim 3, wherein the insulating bobbin (12) includes an upper bobbin (121) inserted from an upper portion of the stator piece and a lower bobbin (122) inserted from a lower portion of the stator piece, and the boss (121a) is provided on an upper surface of the upper bobbin (121).

5. The vacuum cleaner motor according to claim 1, characterized in that the motor housing (3) is a metal housing.

6. The cleaner motor according to claim 5, wherein both sides of the circumference of any of the stator pieces are provided with a first groove (111) or a projection (112) for engaging with an adjacent stator piece.

7. The motor for the vacuum cleaner as claimed in any one of claims 1 to 6, wherein the rotor assembly (2) comprises a rotor shaft (21), a magnet (22), a bearing (23), a wave-shaped spring (24) and a rear bracket (25), the bearing (23) is sleeved on the rotor shaft (21) and is in interference fit with the rotor shaft (21), and the rear bracket (25) is a rear bracket (25) made of metal.

8. A method of assembly, comprising:

assembling a stator assembly (1);

the stator assembly (1) is arranged in a motor shell (3);

assembling a rotor assembly (2);

-loading the rotor assembly (2) into the motor housing (3) in which the stator assembly (1) is mounted;

connecting a fixed impeller (4) with the motor shell (3), wherein the motor shell (3) is arranged on the inner side of the inner annular wall;

installing a movable impeller (5) and a fan cover (6);

mounting the circuit board (7) on the insulating framework (12);

and mounting a rear cover (8).

9. The assembly method according to claim 8, characterized in that said assembling said stator assembly (1) comprises:

installing an insulating framework (12) on the stator block;

winding the outside of the insulating framework (12) to form a winding (13), and mounting a terminal (14);

at least three stator blocks are arranged in a splicing mode.

10. The assembly method according to claim 8, wherein said fitting of said stator assembly (1) into a motor housing (3) comprises:

a stator core (11) in the stator assembly (1) is in interference fit with the motor shell (3);

or a stator core (11) in the stator assembly (1) is in clearance fit with the motor shell (3) and is bonded to the motor shell (3) through adhesive.