CN212726602U - Three-slot two-pole structure and motor thereof - Google Patents

Abstract

The utility model discloses a three-slot two-pole structure and a motor thereof, wherein the three-slot two-pole structure comprises a shell, a stator arranged in the shell, a rotor arranged in the stator and a rotating shaft which axially passes through the rotor and is used for driving the rotor to rotate, the rotor comprises a rotor core body, a plurality of magnets which are parallel to the rotating shaft and are arranged in the rotor core body, and a rotor front cover and a rotor rear cover which are respectively arranged on the front end surface and the rear end surface of the rotor core body and are used for limiting the magnets in the rotor core body; the magnets are arranged in a rectangular shape by taking the rotating shaft as the center. The utility model discloses an improve the structure of rotor, when satisfying the performance requirement of motor, the effectual utilization ratio that enlarges magnet has reduced the use cost of magnet to realize reducing motor cost's advantage.

Description

Three-slot two-pole structure and motor thereof

Technical Field

The utility model relates to the technical field of motors, in particular to three groove two-pole structure and motor thereof.

Background

With the development of science and technology, people increasingly demand high-speed motors, and in the field of brushless motors, when the rotating speed of the motor reaches a range of seven to one hundred thousand revolutions, in order to avoid too large eddy current loss of the motor in the operation process and to match the frequency on a controller chip, a single-phase brushless motor with a structure of a high-speed motor of four-slot two poles or a three-phase brushless direct current motor with three-slot two poles and six-slot two poles is often used.

In a three-phase brushless dc motor with three slots and two poles, the rotor structure is usually formed by sleeving an annular sintered neodymium-iron-boron magnet on a shaft core, which is similar to a surface-mounted magnet, and although the performance of the magnet can be effectively exerted, the process in the magnet manufacturing process is complex, the production efficiency is low, and the utilization rate of the magnet is poor, so that the cost of the motor is high.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a three-groove two-pole structure and motor thereof aims at solving the magnet on the rotor of three-groove two-pole DC brushless motor among the prior art and has that the preparation technology is complicated, production efficiency is low and the rate of utilization is poor and lead to the problem that the motor is with high costs.

The utility model provides a three-slot two-pole structure, which comprises a shell, a stator arranged in the shell, a rotor arranged in the stator and a rotating shaft which axially passes through the rotor and is used for driving the rotor to rotate, wherein the rotor comprises a rotor core body, a plurality of magnets which are parallel to the rotating shaft and are arranged in the rotor core body, and a rotor front cover and a rotor rear cover which are respectively arranged on the front end surface and the rear end surface of the rotor core body and are used for limiting the magnets in the rotor core body; the magnets are arranged in a rectangular shape by taking the rotating shaft as the center.

Furthermore, the rotor core body is provided with two through grooves communicated with two end faces of the rotor core body, the through grooves are symmetrically distributed by taking the rotating shaft as a center, each through groove is internally provided with 2 symmetrical insertion positions, and the magnets are rectangular strips and are inserted in the insertion positions.

Further, the rotor front cover is bonded to the front end face of the rotor core body, and the rotor rear cover is bonded to the rear end face of the rotor core body.

Further, the polarity of the magnet in one of the through grooves is opposite to that of the corresponding magnet in the other through groove.

Further, the shell includes that the main casing body of rear end open-ended closes the lid behind the casing of main casing body rear end with the lid, the front end of the main casing body is equipped with the front bearing, cover behind the casing and be equipped with the rear bearing, the both ends of pivot are rotated respectively and are connected in front bearing and the rear bearing.

Further, the inboard of main casing body is equipped with the bulge, the outside of stator be equipped with the bar draw-in groove of bulge adaptation, the stator cartridge in the main casing body.

Further, the inboard of stator is equipped with a plurality of evenly distributed and is used for installing stator winding's wire winding portion, the inboard of wire winding portion is the arc, and the inboard of a plurality of wire winding portions be cyclic annular evenly distributed and with the rotor core all leaves the clearance.

Further, the front end of stator is equipped with a plurality of evenly distributed and supports the butt joint piece on the front end of main casing body, the rear end card of stator is equipped with the stator rear end cap, the edge of stator rear end cap is equipped with a plurality of evenly distributed and is used for the breach that the lead-out wire of stator winding was drawn forth.

Furthermore, a positioning column for positioning the stator rear end cover is arranged at the rear end of the stator, and a positioning opening matched with the positioning column is formed in the stator rear end cover; the rear end of stator is equipped with a plurality of evenly distributed's buckle, be equipped with on the stator rear end cap a plurality of with the joint mouth of buckle adaptation.

The embodiment of the utility model provides a still provide a motor, include as above three groove two pole structures.

The embodiment of the utility model provides a three-slot two-pole structure and motor thereof, the three-slot two-pole structure comprises a shell, a stator installed in the shell, a rotor arranged in the stator and a rotating shaft which axially passes through the rotor and is used for driving the rotor to rotate, the rotor comprises a rotor core body, a plurality of magnets which are parallel to the rotating shaft and are installed in the rotor core body, and a rotor front cover and a rotor rear cover which are respectively arranged on the front end surface and the rear end surface of the rotor core body and are used for limiting the magnets in the rotor core body; the magnets are arranged in a rectangular shape by taking the rotating shaft as the center. The embodiment of the utility model provides a through the structure of improving the rotor, when satisfying the performance requirement of motor, the effectual utilization ratio that enlarges magnet has reduced the use cost of magnet to realize reducing motor cost's advantage.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without any creative effort.

Fig. 1 is a schematic view of an overall structure of a motor according to an embodiment of the present invention;

fig. 2 is an exploded schematic view of a motor according to an embodiment of the present invention;

FIG. 3 is an enlarged schematic view of a portion A of FIG. 2;

fig. 4 is a diagram illustrating a polarity distribution of a magnet according to an embodiment of the present invention;

fig. 5 is an exploded schematic view of a stator according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be further understood that the term "and/or" as used in the specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.

Referring to fig. 1 and 2, the present invention provides a three-slot two-pole structure, including a housing 1, a stator 2 installed in the housing 1, a rotor 3 disposed in the stator 2, and a rotating shaft 4 axially passing through the rotor 3 and used for driving the rotor 3 to rotate, wherein the rotor 3 includes a rotor core 31, a plurality of magnets 32 parallel to the rotating shaft 4 and installed in the rotor core 31, and a rotor front cover 33 and a rotor rear cover 34 respectively disposed on a front end face and a rear end face of the rotor core 31 and used for limiting the magnets 32 in the rotor core 31; the plurality of magnets 32 are arranged in a rectangular shape with the rotating shaft 4 as the center.

The shell 1, the stator 2, the rotor 3 and the rotating shaft 4 are all parts in a motor, the shell 1 can be arranged as an outer surface as a protective part, the stator 2 is arranged in the shell 1, and the rotor 3 is arranged in the stator 2 and rotates through the rotating shaft 4; the rotor 3 comprises a rotor core body 31, a magnet 32, a rotor front cover 33 and a rotor rear cover 34, the rotor core body 31 is used as a mounting carrier of the magnet 32, the plurality of magnets 32 are arranged in a rectangular shape with the rotating shaft 4 as the center, and are mounted in the rotor core body 31 in an insertion manner; the rotor front cover 33 and the rotor rear cover 34 are respectively disposed on the front end surface and the rear end surface of the rotor core 31, and both ends of the rotor core 31 can be sealed, so that the magnet 32 is confined in the rotor core 31, and the stability of the magnet 32 during rotation is ensured.

Compare traditional rotor 3 of three-flute two-pole structure, this embodiment is right rotor 3's structure has improved, through many magnet 32 of interpolation dress in the rotor core 31 have replaced traditional cylindrical magnet structure who takes the mesopore, rotor core 31 can adopt the blade of silicon steel material for structural sufficient intensity that has, will magnet 32 can ignore the intensity requirement of magnet 32 after installing in rotor core 31, and this structure has strengthened the reliability of motor, has also increased the rate of utilization of blade of silicon steel simultaneously.

Referring to fig. 3, in an embodiment, the rotor core 31 is provided with two through slots 311 communicating two end surfaces thereof, the through slots 311 are symmetrically distributed around the rotating shaft 4, each through slot 311 is provided with 2 symmetrical insertion positions 3111, and the magnet 32 is in a rectangular strip shape and is inserted into the insertion position 3111.

In this embodiment, the rotor core body 31 is a cylindrical structure with a central hole, two through grooves 311 are formed in the rotor core body 31, the two through grooves 311 are symmetrically distributed around the rotating shaft 4, notches at two ends of each through groove 311 are respectively communicated with the front end face and the rear end face of the rotor core body 31, and the magnets 32 can be inserted through the front end face or the rear end face of the rotor core body 31; specifically, 2 symmetrical insertion positions 3111 are arranged in each through slot 311, that is, four insertion positions 3111 are formed by the two through slots 311 and are arranged in a rectangular shape; the magnets 32 are correspondingly provided with four magnets, and are correspondingly inserted into the insertion positions 3111 one by one.

Further, the magnet 32 may be configured as a rectangular strip and adapted to the insertion position 3111, so as to improve stability of the magnet 32 in the upper rotor core 31.

In one embodiment, the rotor front cover 33 is bonded to the front end surface of the rotor core 31, and the rotor rear cover 34 is bonded to the rear end surface of the rotor core 31.

In this embodiment, the rotor front cover 33 and the rotor rear cover 34 are used for confining the magnet 32 in the rotor core 31, and the rotor front cover 33 and the rotor rear cover 34 can be fixed to the front end surface and the rear end surface of the rotor core 31 respectively in an adhesive manner, that is, the rotor front cover 33 and the rotor rear cover 34 close the notches at the two ends of the through slot 311, so as to confine the magnet 32 in the rotor core 31; of course, the rotor front cover 33 and the rotor rear cover 34 may be fixed to the front end surface and the rear end surface of the rotor core 31 by other methods such as clamping, fastening, and the like.

In one embodiment, the magnets 32 in one of the through slots 311 are of opposite polarity to the corresponding magnets 32 in the other through slot 311.

In this embodiment, as shown in fig. 4, the magnets 32 in the two through slots 311 are symmetrically arranged, and the polarities of the magnets 32 are opposite, so that when the motor is powered on, an induced potential can be generated and acts on the magnets 32, the rotor 3 can be rotated to start the motor, and the cogging torque formed in the rotating process is smaller, so that the motor is more stable in operation.

In an embodiment, the housing 1 includes a main housing 11 with an opening at a rear end and a housing rear cover 12 covering the rear end of the main housing 11, a front bearing 111 is disposed at a front end of the main housing 11, a rear bearing 121 is disposed on the housing rear cover 12, and two ends of the rotating shaft 4 are respectively rotatably connected in the front bearing 111 and the rear bearing 121.

In this embodiment, the front bearing 111 is fixedly disposed in the middle of the front end of the main housing 11, the rear bearing 121 is fixedly disposed in the middle of the rear housing cover 12, and two ends of the rotating shaft 4 are respectively rotatably connected to the front bearing 111 and the rear bearing 121, so that the spatial position of the rotating shaft 4 can be determined, and the rotating shaft 4 can stably rotate, thereby driving the rotor 3 to stably rotate, and further improving the stability of the motor.

In an embodiment, a protrusion 112 is disposed on an inner side of the main housing 11, a bar-shaped slot 21 adapted to the protrusion 112 is disposed on an outer side of the stator 2, and the stator 2 is inserted into the main housing 11.

In this embodiment, after the stator 2 is inserted into the main housing 11 by matching the protrusion 112 on the inner side of the main housing 11 with the bar-shaped slot 21 on the outer side of the stator 2, the protrusion 112 and the bar-shaped slot 21 may form a limiting mechanism, so as to prevent the stator 2 from rotating in the circumferential direction.

Referring to fig. 5, in an embodiment, the inner side of the stator 2 is provided with a plurality of winding portions 22 that are uniformly distributed and used for installing stator windings, the inner side of the winding portion 22 is arc-shaped, and the inner sides of the plurality of winding portions 22 are uniformly distributed in a ring shape and have a gap with the rotor core 31.

In this embodiment, 3 winding portions 22 are uniformly distributed on the inner side of the stator 2, the winding portions 22 are used for winding an electrical coil and forming stator windings, and each winding portion 22 corresponds to one stator winding; the inner sides of the winding parts 22 are uniformly distributed in a ring shape and have gaps with the rotor core body 31, so that a space is reserved between the stator 2 and the rotor 3, and on one hand, the rotor 3 can freely rotate in the stator 2; another aspect is that the stator windings are energized to facilitate a stable induced electrical potential in space and acting on the magnets 32 to tend to rotate the rotor 3.

Referring to fig. 5, in an embodiment, the front end of the stator 2 is provided with a plurality of abutting blocks 23 which are uniformly distributed and abut against the front end of the main housing 11, the rear end of the stator 2 is clamped with a stator rear end cover 24, and the edge of the stator rear end cover 24 is provided with a plurality of notches 241 which are uniformly distributed and used for leading out the outgoing lines of the stator winding.

In this embodiment, the front end of the stator 2 is provided with 3 evenly distributed abutting blocks 23, and in the process of assembling the stator 2, the 3 abutting blocks 23 abut against the front end of the main housing 11 to form a gap, so that the parts can be prevented from being too compact; the stator rear end cover 24 is clamped at the rear end of the stator 2 and can protect the interior of the stator 2, and a notch 241 for leading out an outgoing line of a stator winding can be arranged on the stator rear end cover 24 and can separate the outgoing line or other conducting wires arranged on the stator 2 to prevent the lines from being disordered.

In an embodiment, a positioning column 25 for positioning the stator rear end cover 24 is arranged at the rear end of the stator 2, and a positioning opening 242 matched with the positioning column 25 is arranged on the stator rear end cover 24; the rear end of the stator 2 is provided with a plurality of evenly distributed buckles 26, and the stator rear end cover 24 is provided with a plurality of buckle interfaces 243 adapted to the buckles 26.

In this embodiment, through the positioning column 25 with the cooperation of location mouth 242 can make the accurate location of stator rear end cap 24 is in the rear end of stator 2, the rethread buckle 26 joint is in joint interface 243, can with stator rear end cap 24 joint is installed the rear end of stator 2, buckle 26 with joint interface 243 sets up 3 respectively and circumference evenly distributed, can improve like this stator rear end cap 24 clamps the stability of the rear end of stator 2.

The embodiment of the utility model provides a still provide a motor, include as above three groove two pole structures.

The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

It is further noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion.

It should be noted that the present invention is not limited to the particular embodiments described herein, and that the present invention includes all embodiments that are within the scope of the present invention. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Claims (10)

1. The utility model provides a three groove two poles of earth structure which characterized in that: the magnetic control device comprises a shell, a stator arranged in the shell, a rotor arranged in the stator and a rotating shaft which axially penetrates through the rotor and is used for driving the rotor to rotate, wherein the rotor comprises a rotor core body, a plurality of magnets which are parallel to the rotating shaft and are arranged in the rotor core body, and a rotor front cover and a rotor rear cover which are respectively arranged on the front end surface and the rear end surface of the rotor core body and are used for limiting the magnets in the rotor core body; the magnets are arranged in a rectangular shape by taking the rotating shaft as the center.

2. A three-slot, two-pole structure according to claim 1, wherein: the rotor core body is provided with two through grooves communicated with two end faces of the rotor core body, the through grooves are symmetrically distributed by taking the rotating shaft as a center, each through groove is internally provided with 2 symmetrical insertion positions, and the magnets are rectangular strips and are inserted in the insertion positions.

3. A three-slot, two-pole structure according to claim 2, wherein: the rotor front cover is bonded to the front end face of the rotor core body, and the rotor rear cover is bonded to the rear end face of the rotor core body.

4. A three-slot, two-pole structure according to claim 2, wherein: the polarity of the magnet in one through groove is opposite to that of the corresponding magnet in the other through groove.

5. A three-slot, two-pole structure according to claim 1, wherein: the shell comprises a main shell body with an opening at the rear end and a shell rear cover covering the rear end of the main shell body, a front bearing is arranged at the front end of the main shell body, a rear bearing is arranged on the shell rear cover, and two ends of a rotating shaft are respectively rotatably connected into the front bearing and the rear bearing.

6. A three-slot, two-pole structure according to claim 5, wherein: the inboard of main casing body is equipped with the bulge, the outside of stator be equipped with the bar draw-in groove of bulge adaptation, the stator cartridge in the main casing body.

7. A three-slot, two-pole structure according to claim 6, wherein: the inboard of stator is equipped with a plurality of evenly distributed and is used for installing stator winding's wire winding portion, the inboard of wire winding portion is the arc, and the inboard of a plurality of wire winding portions be cyclic annular evenly distributed and with the rotor core all leaves the clearance.

8. A three-slot, two-pole structure according to claim 7, wherein: the front end of stator is equipped with a plurality of evenly distributed and supports the butt joint piece on the front end of the main casing body, the rear end card of stator is equipped with the stator rear end cap, the edge of stator rear end cap is equipped with a plurality of evenly distributed and is used for the breach that the lead-out wire of stator winding was drawn forth.

9. A three-slot, two-pole structure according to claim 8, wherein: the rear end of the stator is provided with a positioning column for positioning the rear end cover of the stator, and the rear end cover of the stator is provided with a positioning hole matched with the positioning column; the rear end of stator is equipped with a plurality of evenly distributed's buckle, be equipped with on the stator rear end cap a plurality of with the joint mouth of buckle adaptation.

10. An electric machine characterized by: comprising a three-slot, two-pole structure according to any of claims 1 to 9.

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