CN211830398U

CN211830398U - Outer rotor DC motor

Info

Publication number: CN211830398U
Application number: CN202020680829.1U
Authority: CN
Inventors: 李广海
Original assignee: Jiangmen Pengjiang Fengshang Electrical Products Co Ltd
Current assignee: Jiangmen Pengjiang Fengshang Electrical Products Co Ltd
Priority date: 2020-04-27
Filing date: 2020-04-27
Publication date: 2020-10-30
Anticipated expiration: 2030-04-27

Abstract

The utility model discloses an external rotor direct current motor, which comprises a stator, wherein the stator comprises an iron core and an insulating sleeve which is integrally formed with the iron core, a rotor is sleeved on the stator, and a plurality of permanent magnets are arranged on the rotor; the shell comprises an upper shell and a lower shell, wherein a sleeve which is in contact with the upper shell is arranged on the lower shell in an extending mode, a sealing cavity is formed between the lower shell and the upper shell, and the stator and the rotor are installed in the sealing cavity. The utility model discloses an iron core and insulating cover integrated into one piece's stator avoids insulating cover pine to take off, guarantees that the assembly is reliable, forms sealed chamber between epitheca and the inferior valve, installs stator and rotor seal in sealed intracavity, avoids steam or particle impurity to get into the motor splash, improves the finished product reliability, improves finished product quality, increase of service life.

Description

Outer rotor DC motor

Technical Field

The utility model relates to the technical field of electric machines, in particular to external rotor direct current motor.

Background

The outer rotor motor is a motor with a structure that a stator is arranged inside and a rotor is arranged outside, wherein in the existing outer rotor direct current motor, an insulating sleeve is assembled on the surface of the stator, a copper wire winding is wound on the stator and is connected by adopting a wire harness through manual binding, then the stator is installed in the rotor, finally shells are installed on the upper side and the lower side of the rotor to complete the motor assembly, the insulating sleeve is easy to loosen and loose to influence the assembly reliability, the shells are in contact with the upper end face and the lower end face of the rotor, a gap exists between the shells and the rotor, water vapor or particle impurities easily enter the motor to damage the motor, the finished product reliability is poor, and.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve one of the technical problem that exists among the prior art at least, provide an external rotor direct current motor, can improve product quality, improve the finished product reliability, increase of service life.

According to the utility model discloses external rotor direct current motor, include: the stator, the stator include the iron core, and with iron core integrated into one piece's insulating cover, the cover is equipped with the rotor on the stator, and the shell includes epitheca and inferior valve, extend on the inferior valve be provided with the sleeve of epitheca contact, the inferior valve with form sealed chamber between the epitheca, stator and rotor are installed sealed intracavity.

According to the utility model discloses external rotor direct current motor has following technological effect at least: adopt iron core and insulating cover integrated into one piece's stator, avoid insulating cover pine to take off, guarantee that the assembly is reliable, form the seal chamber between epitheca and the inferior valve, with stator and rotor seal installation in the seal chamber, avoid steam or particle impurity to get into the motor splash, improve finished product reliability, improve finished product quality, increase of service life.

According to some embodiments of the utility model, the joint has the circuit board of being connected with copper wire winding on the insulating boot. In the process of bundling, the wire harness is easy to loosen and fall off, so that the reject ratio of products is increased, the circuit board is connected with the copper wire winding, the wiring reliability is ensured, the product quality is improved, manual bundling is replaced, and the production efficiency is improved.

According to some embodiments of the utility model, the shell with the rotor runs through and is provided with the connecting screw, the cover is equipped with fastening nut on the connecting screw. The connecting screw and the fastening nut are matched and locked to fasten the shell and the rotor, so that the structure is simple and the connection is reliable.

According to some embodiments of the utility model, be provided with a plurality of guide pillars in the rotor, the guide pillar both ends are connected with and run through the fastening screw of shell. The guide pillar is used for positioning and installing the fastening screw, so that the positioning is accurate and quick, and the assembly efficiency is improved.

According to some embodiments of the invention, the rotor comprises a plurality of permanent magnets and yokes, the permanent magnets with the viscose connection between the yokes. The permanent magnets form induction coils, the permanent magnets are supported by the magnetic yokes, the induction coils are fixed, magnetic leakage is reduced, the permanent magnets and the magnetic yokes are fixedly connected through viscose, the adhesion force of the permanent magnets is increased, the permanent magnets are prevented from flying out due to centrifugal force when rotating at high speed, and the working reliability of the rotor is guaranteed.

According to some embodiments of the utility model, the rotor includes a plurality of permanent magnets, and with a plurality of permanent magnet integrated into one piece's collar, a plurality of permanent magnet circumference equipartition sets up in the collar. Through permanent magnet and collar integrated into one piece, reduce the equipment process, avoid the permanent magnet pine to take off, guarantee the installation reliable, be favorable to improving product quality.

According to some embodiments of the utility model, be provided with on the insulating boot and be used for the installation the location buckle of circuit board. Through location buckle location installation circuit board, avoid the circuit board pine to take off, it is convenient to install, guarantees that the wiring is reliable.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural diagram of an external rotor dc motor according to a first embodiment of the present invention;

FIG. 2 is a schematic view of the stator structure shown in FIG. 1;

FIG. 3 is a schematic view of the housing assembly shown in FIG. 1;

fig. 4 is a schematic structural diagram of an outer rotor dc motor according to a second embodiment of the present invention;

fig. 5 is a schematic structural diagram of an external rotor dc motor according to a third embodiment of the present invention;

fig. 6 is a schematic structural diagram of an outer rotor dc motor according to the fourth embodiment of the present invention.

Reference numerals:

stator 100, iron core 110, insulation sleeve 120, positioning buckle 121, circuit board 130,

Rotor 200, permanent magnet 210, yoke 220, mounting ring 230, coupling screw 240, fastening nut 241, guide post 250, fastening screw 251,

The device comprises a shell 300, an upper shell 310, a lower shell 320, a sleeve 321, a sealed cavity 330 and a bearing 340.

Detailed Description

This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

An outer rotor dc motor according to an embodiment of the present invention is described below with reference to fig. 1 to 6.

As shown in fig. 1 to 3, according to the embodiment of the present invention, an outer rotor dc motor includes a stator 100 and a rotor 200 sleeved on the stator 100, the stator 100 includes an iron core 110 and an insulating sleeve 120 which are integrally formed, a circuit board 130 connected with a copper wire winding is provided on the insulating sleeve 120, a plurality of permanent magnets 210 are provided on the rotor 200, a housing 300 is provided outside the stator 100 and the rotor 200, a sealing cavity 340 is provided inside the housing 300, and the stator 100 and the rotor 200 are hermetically installed in the sealing cavity 340.

Wherein, the housing 300 includes an upper shell 310 and a lower shell 320, a sleeve 330 contacting with the upper shell 310 is extended and arranged on the lower shell 320, a sealing cavity 340 is formed between the lower shell 320 with the sleeve 330 and the upper shell 310, further, a bearing 350 is arranged between the upper shell 310 and the stator 100 and between the lower shell 320 and the stator 100, it can be understood that, during assembly, the stator 100 and the rotor 200 are assembled into a combined piece in a matching way, the upper shell 310 and the lower shell 320 are respectively arranged on the upper side and the lower side of the combined piece, the lower shell 320 contacts with the upper shell 310 through the sleeve 330, a cylindrical sealing cavity 340 is formed inside, the stator 100 and the rotor 200 are arranged in the sealing cavity 340, the structure is simple, the assembly is convenient, water vapor, particles and the like are prevented from entering the inside of.

As shown in fig. 2, in some embodiments of the present invention, the insulating sheath 120 is provided with a positioning buckle 121 for mounting the circuit board 130. Adopt location buckle 121 and circuit board 130 joint, location installation circuit board 130 avoids circuit board 130 pine to take off, and it is convenient to install, guarantees that the wiring is reliable.

In some embodiments of the present invention, the housing 300 and the rotor 200 are provided with a connection screw 240, and a fastening nut 241 is sleeved on the connection screw 240. Wherein, the connection screw 240 may be a long screw. The connecting screw 240 sequentially penetrates through the upper shell 310, the rotor 200 and the lower shell 320, and the fastening nut 241 and the connecting screw 240 are matched and locked to fasten and connect the shell 300 and the rotor 200, so that the installation is reliable.

As shown in fig. 4 and 6, in some embodiments of the present invention, a plurality of guide posts 250 are disposed in the rotor 200, and fastening screws 251 penetrating through the housing 300 are connected to both ends of the guide posts 250. During assembly, the two sides of the upper shell 310 and the lower shell 320 are respectively fastened and connected with the guide posts through fastening screws 251, so that the assembly is flexible and convenient, the positioning is accurate and quick, and the assembly efficiency is improved.

The guide post 250 and the rotor 200 may be provided separately or integrally, and when the separate guide post 250 is provided separately, the guide post 250 is inserted into the rotor 200 during the process of assembling the motor, and when the separate guide post 250 is provided integrally with the rotor 200.

As shown in fig. 1 and 4, in some embodiments of the present invention, the rotor 200 includes a plurality of permanent magnets 210 and a magnetic yoke 220, and the permanent magnets 210 and the magnetic yoke 220 are connected by glue. Specifically, the magnetic yoke 220 is annular, and is made of soft magnetic materials such as soft iron or soft magnetic alloy, and a plurality of permanent magnets 210 are pasted on the inner wall of the magnetic yoke 220 through viscose, and are arranged uniformly in the circumferential direction. It can be understood that, when the motor operates, the rotor 200 rotates at a high speed, the permanent magnets 210 rotate at a high speed to form induction coils, centrifugal force is generated, the permanent magnets 210 are supported by the magnetic yoke 220, the positions of the induction coils are fixed, magnetic leakage is reduced, adhesion force of the permanent magnets 210 can be increased by adhesion between the permanent magnets 210 and the magnetic yoke 220, the permanent magnets 210 are prevented from flying out due to the centrifugal force when rotating at a high speed, and the rotor 200 is ensured to operate reliably.

As shown in fig. 5 and 6, the rotor 200 includes a plurality of permanent magnets 210, and a mounting ring 230 integrally formed with the plurality of permanent magnets 210, wherein the plurality of permanent magnets 210 are uniformly circumferentially arranged in the mounting ring 230. Wherein, collar 230 is the injection molding, and collar 230 and permanent magnet 210 are through the mode integrated into one piece preparation of moulding plastics, reduce the equipment process, avoid permanent magnet 210 pine to take off, guarantee that the installation is reliable, are favorable to improving product quality.

An outer rotor dc motor according to an embodiment of the present invention is described in detail with a specific embodiment with reference to fig. 1 to 6. It is to be understood that the following description is illustrative only and is not intended as a specific limitation on the invention.

As shown in fig. 1, the outer rotor dc motor according to the first embodiment of the present invention includes a stator 100, a rotor 200 sleeved outside the stator 100, and a housing 300 for hermetically accommodating the stator 100 and the rotor 200.

The stator 100 includes an iron core 110 and an insulating sleeve 120 which are integrally formed, a circuit board 130 and a positioning buckle 121 for mounting the circuit board 130 are mounted on the insulating sleeve 120, the circuit board 130 is connected with a copper wire winding (not shown in the figure), the rotor 200 includes a plurality of permanent magnets 210 and a magnetic yoke 220, the permanent magnets 210 are uniformly fixed on the inner wall of the magnetic yoke 220 in the circumferential direction by an adhesive, the housing 300 includes an upper shell 310 and a lower shell 320, the lower shell 320 is extended and provided with a sleeve 330 contacting with the upper shell 310, so that a sealed cavity 340 is formed between the lower shell 320 and the upper shell 310, bearings 350 are respectively arranged between the upper shell 310 and the stator 100, the housing 310 and the lower shell 320 and the stator 100, a connecting screw 240 penetrates through the housing 300 and the rotor 200, the connecting screw 240 sequentially penetrates through the upper,

as shown in fig. 4, according to the second embodiment of the present invention, compared to the first embodiment, the connection screw 240 and the fastening nut 241 are eliminated, the rotor 200 is provided with a plurality of guide pillars 250, and the fastening screw 251 passes through the upper shell 310 or the lower shell 320 to be connected with the guide pillars 250.

As shown in fig. 5, according to the third embodiment of the present invention, compared with the first embodiment, the rotor 200 is configured as a plurality of permanent magnets 210 and a mounting ring 230 integrally formed by injection molding, the mounting ring 230 is an injection molding, and the plurality of permanent magnets 210 are circumferentially and uniformly distributed in the mounting ring 230.

As shown in fig. 6, according to the fourth embodiment of the present invention, compared with the first embodiment, the connection screw 240 and the fastening nut 241 are eliminated, the rotor 200 is provided with a plurality of guide posts 250, the fastening screw 251 passes through the upper shell 310 or the lower shell 320 to be connected with the guide posts 250, the rotor 200 is provided with a plurality of permanent magnets 210 and a mounting ring 230 which are integrally formed by injection molding, the mounting ring 230 is an injection molding part, and the plurality of permanent magnets 210 are circumferentially and uniformly distributed in the mounting ring 230.

According to the utility model discloses external rotor direct current motor, through so setting up, some effects as following at least can be reached, adopt iron core 110 and insulating cover 120 integrated into one piece's stator 100, and circuit board 130 wiring, avoid insulating cover 120 pine to take off, cancel the pencil ligature, reduce repeated equipment process, effectively improve production efficiency, guarantee that stator 100 installation and coil wiring are reliable, simultaneously with stator 100 and rotor 200 seal installation in shell 300, avoid steam or particulate impurity to get into the motor splash, improve the finished product reliability, improve finished product quality, rotor 200 through permanent magnet 210 and mounting ring 230 integrated into one piece, reduce the equipment process, avoid the permanent magnet 210 pine to take off, guarantee that the installation is reliable, connect fastening screw 251 through guide pillar 250 both ends, fastening installation upper shell 310 and inferior valve 320, connect reliably, the assembly is high-efficient nimble.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims

1. An outer rotor direct current motor, comprising:

the stator comprises an iron core and an insulating sleeve which is integrally formed with the iron core;

the rotor is sleeved outside the stator;

the shell comprises an upper shell and a lower shell, wherein a sleeve which is in contact with the upper shell is arranged on the lower shell in an extending mode, a sealing cavity is formed between the lower shell and the upper shell, and the stator and the rotor are installed in the sealing cavity.

2. The external rotor dc motor of claim 1, wherein: and the insulating sleeve is clamped with a circuit board connected with the copper wire winding.

3. The external rotor dc motor of claim 1, wherein: the shell with the rotor runs through and is provided with connecting screw, the last cover of connecting screw is equipped with fastening nut.

4. The external rotor dc motor of claim 1, wherein: a plurality of guide posts are arranged in the rotor, and two ends of each guide post are connected with fastening screws penetrating through the shell.

5. The external rotor dc motor of claim 1, wherein: the rotor comprises a plurality of permanent magnets and a magnet yoke, and the permanent magnets are connected with the magnet yoke through adhesive.

6. The external rotor dc motor of claim 1, wherein: the rotor comprises a plurality of permanent magnets and a plurality of mounting rings which are integrally formed with the permanent magnets, and the permanent magnets are circumferentially and uniformly distributed in the mounting rings.

7. The external rotor dc motor of claim 2, wherein: and the insulating sleeve is provided with a positioning buckle for mounting the circuit board.