CN212726585U

CN212726585U - Direct current brushless inductive motor and stator assembly thereof

Info

Publication number: CN212726585U
Application number: CN202021575027.0U
Authority: CN
Inventors: 杨行; 袁心芝
Original assignee: Shenzhen Topband Co Ltd
Current assignee: Shenzhen Topband Co Ltd
Priority date: 2020-07-31
Filing date: 2020-07-31
Publication date: 2021-03-16
Anticipated expiration: 2030-07-31

Abstract

The utility model relates to a direct current brushless inductive motor and a stator assembly thereof, the stator assembly comprises a stator core, a rubber coating assembly coated on the stator core, and a Hall plate arranged at one end of the rubber coating assembly and connected with the rubber coating assembly; the Hall plate is provided with a positioning hole matched with the rubber coating component; one end of the rubber-coated component is provided with a positioning column which is arranged corresponding to the positioning hole; the positioning column is inserted into the positioning hole, one end of the positioning column penetrates out of the positioning hole, and a pressing part which is pressed and fixed with the Hall plate is formed at one end of the positioning column, which penetrates out of the positioning hole, through a hot riveting process. This stator module through with the reference column wear out the one end of locating hole through the hot riveting technology form with the fixed nip portion of hall plate pressfitting can improve the stability and the uniformity of hall plate installation, has also strengthened hall plate and rubber coating subassembly's cooperation intensity for the hall plate is easily droing in operation process portion.

Description

Direct current brushless inductive motor and stator assembly thereof

Technical Field

The utility model relates to a motor, more specifically say, relate to a brushless induction motor of direct current and stator module thereof.

Background

With the continuous development of motor technology, the direct current brushless inductive motor gradually replaces the brush motor due to the advantages of small volume, high reliability, long service life and the like. However, the precision of the hall installation position of the direct current brushless inductive motor has a great influence on the performance of the direct current brushless inductive motor, and the development of the direct current brushless inductive motor is seriously restricted; the Hall plate is installed on the Hall plate in a welding mode, so that the accuracy of the Hall installation position is directly influenced by the installation of the Hall plate; two kinds of modes are installed to hall plate among present stator module, firstly install it on the stator seat, secondly install it on the package is moulded iron core through adding the mode of gluing, and wherein the hall installation accuracy is hardly ensured to mode one, and mode two not only can't ensure the stability and the uniformity of hall plate installation, and hall plate cooperation intensity is also lower moreover, if the motor works under abominable operating mode, will have hall plate to break away from the risk.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in, a brushless induction machine of modified direct current and stator module thereof is provided.

The utility model provides a technical scheme that its technical problem adopted is: constructing a stator assembly, which comprises a stator core, a rubber coating assembly and a Hall plate, wherein the rubber coating assembly is coated on the stator core, and the Hall plate is arranged at one end of the rubber coating assembly and is connected with the rubber coating assembly;

the Hall plate is provided with a positioning hole matched with the rubber coating component;

one end of the rubber-coated component is provided with a positioning column which is arranged corresponding to the positioning hole; the positioning column is inserted into the positioning hole, one end of the positioning column penetrates out of the positioning hole, and a pressing part which is pressed and fixed with the Hall plate is formed at one end of the positioning column, which penetrates out of the positioning hole, through a hot riveting process.

Preferably, the encapsulation assembly comprises an encapsulation main body which is encapsulated on the stator core, and a limiting boss which is arranged at one end of the encapsulation main body and protrudes out of the encapsulation main body so as to limit the Hall plate;

the positioning column is arranged on the limiting boss.

Preferably, the cross-sectional shape and size of the positioning column are matched with those of the positioning hole, and the cross-sectional shape and size of the pressing part are larger than those of the positioning column;

the size of the cross section of the positioning column is smaller than that of the cross section of the limiting boss.

Preferably, the number of the positioning holes is multiple, and the plurality of the positioning holes are arranged at intervals along the circumferential direction of the Hall plate;

the rubber coating main body is provided with a plurality of limiting bosses which are arranged at intervals along the circumferential direction of the rubber coating main body;

the positioning columns are multiple, and the positioning columns, the limiting bosses and the positioning holes are arranged in a one-to-one correspondence mode.

Preferably, the stator further comprises a stator seat;

the stator seat is partially inserted into the rubber-coated component;

the stator seat comprises a seat body and a column which is arranged on the seat body and can be inserted into the rubber-coated component;

the cylinder is a hollow structure with two through ends, and a through hole for the rotating shaft to penetrate through can be formed on the inner side of the cylinder.

Preferably, the device further comprises a bearing assembly mounted in the cylinder to cooperate with the rotating shaft.

Preferably, the inner side of the column body is provided with a mounting cavity for mounting the bearing assembly;

and a glue groove filled with glue is arranged on the inner side wall of the column body, which corresponds to the mounting cavity.

The utility model also constructs a direct current brushless inductive motor, which comprises the stator module and a rotor module assembled with the stator module;

the rotor subassembly is established including the cover stator module's stator core outlying casing, both ends are followed stator module wears out the pivot that sets up and paste in the casing and follow a plurality of magnet steel that casing circumference interval set up.

Preferably, the length of the magnetic steel is greater than the height of the stator core.

Preferably, the rotor assembly further comprises an end cap disposed at one end of the housing.

Implement the utility model discloses a brushless induction machine of direct current and stator module thereof has following beneficial effect: during the installation of this stator module's hall board, can insert the reference column of rubber coating subassembly one end in the locating hole of hall board and one end is worn out from the locating hole, and the one end of wearing out the locating hole forms the pressfitting portion through the hot riveting technology and closes fixedly with the hall board pressfitting to improve the stability and the uniformity of hall board installation, also strengthened the cooperation intensity of hall board and rubber coating subassembly, make the hall board easily drop in operation process portion. The direct-current brushless inductive motor has the advantages of good stability and consistency, high matching strength and long service life.

Drawings

The invention will be further explained with reference to the drawings and examples, wherein:

fig. 1 is a schematic structural diagram of a dc brushless induction motor according to some embodiments of the present invention;

FIG. 2 is a cross-sectional view of the DC brushless induction motor shown in FIG. 1;

fig. 3 is an enlarged schematic view of a partial structure of the positioning post and the positioning hole of the dc brushless inductive motor shown in fig. 2;

fig. 4 is an enlarged schematic view of a part of the structure of the glue tank of the dc brushless induction motor shown in fig. 2;

FIG. 5 is an enlarged view of a portion of another glue tank of the DC brushless sensor motor shown in FIG. 2;

fig. 6 is an enlarged schematic view of a partial structure of a magnetic steel (23) and a stator core of the dc brushless induction motor shown in fig. 2;

fig. 7 is a schematic structural diagram of a rubber-covered assembly of the dc brushless induction motor shown in fig. 1;

fig. 8 is a schematic structural diagram of a hall plate of the dc brushless induction motor shown in fig. 1.

Detailed Description

In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Fig. 1 and 2 show some preferred embodiments of the dc brushless induction motor of the present invention. The direct-current brushless inductive motor can be used as a power output mechanism for outputting power to drive the external equipment to operate. The direct-current brushless inductive motor has the advantages of good stability and consistency, high matching strength and long service life.

As shown in fig. 1 and 2, the dc brushless induction motor may include a stator assembly 10 and a rotor assembly 20. The stator assembly 10 can be assembled with the rotor assembly 20, and the rotor assembly 20 can be driven to rotate under the power-on state.

In some embodiments, the stator assembly 10 may include a stator core 11, a rubber-covered assembly 12, and a hall plate 13. The stator core 11 may be disposed on the encapsulation assembly 12. The rubber-covered component 12 can be covered on the stator core 11 and can form an integral structure with the stator core 11. The hall plate 13 can be disposed at one end of the encapsulated assembly 12 and can be connected to the encapsulated assembly 12, which can be used to sense the magnetic field of the stator assembly 10 in the energized state.

Further, in some embodiments, the stator core 11 may include a hollow cylindrical body with two ends penetrating through, and a plurality of tooth portions disposed on an outer side wall of the cylindrical body; the plurality of teeth may be provided at intervals in a circumferential direction of the cylindrical body. One end of each tooth is provided with a yoke, and the width of the yoke may be greater than the width of the tooth.

Further, as shown in fig. 1, 2, and 7, in some embodiments, the shape of the rubber covered component 12 can be adapted to the shape of the stator core 11. The encapsulation assembly 12 includes an encapsulation body 121, a stop boss 122. The encapsulation body 121 is encapsulated on the stator core 11. In some embodiments, the encapsulation body 121 may include a central through hole 1211, and a plurality of interconnected toothed mounting portions 1212 disposed at the periphery of the central through hole 1211; a through hole 1213 for the tooth of the stator core 11 to pass through is formed inside the mounting portion 1212, and a mounting through groove 1214 communicating with the through hole 1211 and for mounting the yoke portion is formed on a side of the mounting portion 1212 opposite to the central through hole 1211. In some embodiments, the limiting boss 122 may be disposed at one end of the encapsulation body 121 and may protrude from the encapsulation body 121, and the limiting boss 122 may be used for limiting the hall plate 13. In some embodiments, the limiting boss 122 can be multiple, and multiple limiting bosses 122 can be arranged at intervals along the circumference of the rubber body 121. In some embodiments, each of the limiting protrusions 122 may be disposed corresponding to the mounting portion 1212, may be located at one end of the mounting portion 1212, and may protrude from an end surface of the mounting portion 1212. In some embodiments, the stop boss 122 can be integrally formed with the overmold body 121, and in particular, in some embodiments, it can be integrally formed with the overmold body 121 by injection molding.

Further, in some embodiments, a positioning post 123 may be disposed at one end of the encapsulation assembly 12, and the positioning post 123 may be disposed on the limiting boss 122. In some embodiments, the positioning pillars 123 may be multiple, and the positioning pillars 123 may be disposed in one-to-one correspondence with the limiting bosses 122. The positioning post 123 can be integrally formed with the limiting boss 122, and in some embodiments, the positioning post 123 can be integrally formed with the limiting boss 122 by injection molding. The positioning post 123 may be cylindrical before assembly with the hall plate 13. After the positioning column 123 and the hall plate 13 are assembled, one end of the positioning column can form a pressing part 1231 through a hot riveting process, the pressing part 1231 can be in a circular plate shape, and the radial dimension of the pressing part 1231 can be larger than that of the positioning column 123. The cross-sectional dimension of the positioning post 123 can be smaller than the cross-sectional dimension of the limiting boss 122, and after the hall plate 13 is assembled with the encapsulation assembly 12, the hall plate 13 can be clamped between the limiting boss 122 and the pressing part 1231.

As shown in fig. 1 to 3 and 8, in some embodiments, the hall plate 13 may have a circular ring shape. The hall plate 13 may include a PCB board 131, and a hall sensor 132 disposed on the PCB board 131. In some embodiments, the hall sensor 132 may be a plurality of hall sensors 132, and the plurality of hall sensors 132 may be spaced apart along the circumference of the PCB 131. The hall plate 13 may be provided with a positioning hole 1311, and the positioning hole 1311 may be provided on the PCB 131. The positioning hole 1311 may be plural, and the positioning holes 1311 may be arranged at intervals along the circumferential direction of the PCB 131. The locating holes 1311 can be used to mate with the rubberized components 12. Specifically, in some embodiments, the positioning holes 1311 and the positioning pillars 123 are disposed in a one-to-one correspondence, and the positioning pillars 1311 can be inserted into the positioning holes 1311, and the cross-sectional shapes and sizes of the positioning pillars 123 can be matched with those of the positioning holes 1311, so as to facilitate insertion into the positioning holes 1311. In some embodiments, when the hall plate 13 is assembled with the encapsulation assembly 12, the positioning post 123 can be inserted into the positioning hole 1311, and one end of the positioning post penetrates out of the positioning hole 1311, and then the end of the positioning post 123 penetrating out of the positioning hole 1311 is pressed and fixed with the hall plate 13 by forming a pressing part 1231 through a hot riveting process, so that the stability and consistency of the hall plate 13 installation are improved, the matching strength of the hall plate 13 and the encapsulation assembly 12 is also enhanced, and the hall plate 13 is easy to fall off during the operation process.

As shown in fig. 2, 4 and 5, further, in some embodiments, the stator assembly may further include a stator seat 14, and the stator seat 14 may be partially inserted into the rubber-covered component 12, and may be used for mounting and positioning the rubber-covered component 12 and the stator core 11. In some embodiments, the stator seat 14 may include a seat body 141 and a column 142, and the seat body 141 may be disposed at one end of the column 142 and may be integrally formed with the column 142. The cylinder 142 can be partially inserted into the encapsulation assembly 12, the cylinder 142 can be a hollow structure with two through ends, and a through hole can be formed on the inner side of the cylinder, and the through hole can be used for the rotation shaft 22 to pass through. In some embodiments, the post 142 may be provided with a mounting cavity 143, and the mounting cavity 143 may be used for mounting the bearing assembly 15. The two mounting cavities 143 may be two, the two mounting cavities 143 may be a first mounting cavity 1431 and a second mounting cavity 1432, and the first mounting cavity 1431 and the second mounting cavity 1432 may be spaced along the length direction of the column 142, and they may be disposed near both ends of the column 142. In some embodiments, a glue groove 144 may be disposed on an inner sidewall of the column 142, and the glue groove 144 may be disposed on an inner sidewall of the column 142 corresponding to the mounting cavity 143 and may be disposed in communication with the mounting cavity 143. The glue groove 144 may be two, and the two glue grooves 144 may be disposed corresponding to the first and second mounting

cavities

1431 and 1432. The glue groove 144 can be used for filling glue to stably mount and fix the bearing assembly 15 in the cylinder 142, thereby improving the bearing push-off force and the twisting force and preventing the inner ring and the outer ring of the bearing 15 from rotating in the operation process. In some embodiments, the glue reservoir 144 may be an annular groove.

Further, in some embodiments, the stator assembly may further include a bearing assembly 15, and the bearing assembly 15 may be installed in the column 142 and may be disposed corresponding to the installation cavity 143 in the column 142. In some embodiments, the bearing assembly 15 can include a first bearing 151 and a second bearing 152, and the first bearing 151 can be a large bearing that can be mounted in the first mounting cavity 1431 and fixed in the first mounting cavity 1431 by filling glue into the glue groove 144. The second bearing 152 may be a small bearing that is mountable in the second mounting cavity 1432 and is fixed in the second mounting cavity 1432 by filling glue into the glue groove 144.

Further, in some embodiments, the stator assembly may further include a flex cable 16, and the flex cable 16 may be connected to the hall plate 13 and led out of the hall plate 13. The stator assembly may further include a plurality of coil windings 17, and the plurality of coil windings 17 may be wound around the mounting portion 121 of the rubber covered assembly 12.

As shown in fig. 2 and 6, further, in some embodiments, the rotor assembly 20 may include a casing 21, a rotating shaft 22, a magnetic steel 23, and an end cover 24, the casing 21 may be a hollow structure with two ends penetrating, the casing 21 may be cylindrical, and the casing 21 may be sleeved on the periphery of the stator core 11 of the stator assembly 10. The rotating shaft 22 may be cylindrical, and the length of the rotating shaft 22 may be greater than that of the stator seat 14, and two ends of the rotating shaft 22 may protrude from the stator assembly 10, specifically, one end of the rotating shaft 22 protrudes from the through hole of the stator seat 14. This magnet steel 23 can be a plurality of, and this a plurality of magnet steels 23 can set up along the circumference interval of this casing 21 to can paste the inside wall of locating this casing 21. The center line of the magnetic steel 23 may be arranged in parallel with the center line of the stator core 11. The length of this magnet steel 23 can be greater than the height of this stator core 11, and it can be higher than this stator core 11's terminal surface, and this difference in height can reduce the influence of the magnetic field that stator core 11 produced to hall response, also can ensure that stator core 11 is in magnet steel 23 magnetic field scope completely, has further improved the uniformity of motor performance. In some embodiments, the end cap 24 may be disposed at one end of the housing 21, and may be partially disposed through the housing 21, and a slot for inserting the magnetic steel 23 may be disposed inside the end cap. The slots may be multiple, and may be arranged in one-to-one correspondence with the plurality of magnetic steels 23.

It is to be understood that the foregoing examples merely represent preferred embodiments of the present invention, and that the description thereof is more specific and detailed, but not intended to limit the scope of the invention; it should be noted that, for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention; therefore, all changes and modifications that come within the meaning and range of equivalency of the claims are to be embraced within their scope.

Claims

1. The stator assembly is characterized by comprising a stator core (11), a rubber coating assembly (12) coated on the stator core (11), and a Hall plate (13) arranged at one end of the rubber coating assembly (12) and connected with the rubber coating assembly (12);

a positioning hole (1311) matched with the rubber-coated component (12) is formed in the Hall plate (13);

one end of the rubber-coating component (12) is provided with a positioning column (123) which is arranged corresponding to the positioning hole (1311); the positioning column (123) is inserted into the positioning hole (1311), one end of the positioning column penetrates out of the positioning hole (1311), and a pressing part (1231) which is pressed and fixed with the Hall plate (13) is formed at one end of the positioning column (123) penetrating out of the positioning hole (1311) through a hot riveting process.

2. The stator assembly according to claim 1, characterized in that the encapsulated assembly (12) comprises an encapsulated main body (121) which is encapsulated on the stator core (11), a limiting boss (122) which is arranged at one end of the encapsulated main body (121) and protrudes out of the encapsulated main body (121) to limit the Hall plate (13);

the positioning column (123) is arranged on the limiting boss (122).

3. The stator assembly according to claim 2, characterized in that the cross-sectional shape and size of the positioning post (123) are matched with the shape and size of the positioning hole (1311), and the cross-sectional shape and size of the stitching part (1231) is larger than the cross-sectional shape and size of the positioning post (123);

the cross section size of the positioning column (123) is smaller than that of the limiting boss (122).

4. The stator assembly according to claim 2, characterized in that the positioning holes (1311) are multiple, and the positioning holes (1311) are arranged at intervals along the circumferential direction of the Hall plate (13);

the number of the limiting bosses (122) is multiple, and the limiting bosses (122) are arranged at intervals along the circumferential direction of the encapsulation main body (121);

the positioning columns (123) are multiple, and the positioning columns (123), the limiting bosses (122) and the positioning holes (1311) are uniformly arranged in a corresponding mode.

5. The stator assembly of claim 1, further comprising a stator seat (14);

the stator seat (14) is partially inserted into the rubber-coated component (12);

the stator seat (14) comprises a seat body (141) and a column body (142) which is arranged on the seat body (141) and can be inserted into the rubber-coated component (12);

the column body (142) is a hollow structure with two through ends, and a through hole for the rotating shaft (22) to penetrate through can be formed on the inner side of the column body.

6. The stator assembly of claim 5, further comprising a bearing assembly (15) mounted in the column (142) for engagement with a rotating shaft (22).

7. The stator assembly of claim 6, characterized in that the inner side of the column (142) is provided with a mounting cavity (143) for mounting the bearing assembly (15);

and a glue groove (144) filled with glue is arranged on the inner side wall of the column body (142) corresponding to the mounting cavity (143).

8. A dc brushless sensorless electric machine comprising a stator assembly (10) according to any of claims 1 to 7, and a rotor assembly (20) assembled with the stator assembly (10);

the rotor assembly (20) comprises a shell (21) which is arranged on the periphery of a stator core (11) of the stator assembly (10) in a sleeved mode, a rotating shaft (22) with two ends penetrating out of the stator assembly (10) and a plurality of magnetic steels (23) which are attached to the shell (21) and are arranged along the circumferential direction of the shell (21) at intervals.

9. A dc brushless induction machine according to claim 8, characterized in that the length of the magnetic steel (23) is larger than the height of the stator core (11).

10. A dc brushless sensorless motor according to claim 8 wherein the rotor assembly (20) further comprises an end cap (24) disposed at one end of the housing (21).