CN110957821A

CN110957821A - Motor stator

Info

Publication number: CN110957821A
Application number: CN201811136684.2A
Authority: CN
Inventors: 洪银树; 林建良
Original assignee: Sunon Electronics Foshan Co Ltd
Current assignee: Beihai jianzhun Electronics Co.,Ltd.
Priority date: 2018-09-27
Filing date: 2018-09-27
Publication date: 2020-04-03

Abstract

A motor stator for solving the problem that the stator is easy to loose when the existing motor is started comprises: a base having at least one positioning hole located at an outer periphery of a shaft coupling portion; the winding group is provided with a magnetic pole piece combined with an insulating piece, a coil is wound on the insulating piece, at least one positioning convex column is connected with the insulating piece, the positioning convex column penetrates through the positioning hole, and the positioning convex column is not electrically connected with the coil; and the elastic bundle external member is sleeved with the positioning convex column and is abutted against the inner wall of the positioning hole.

Description

Motor stator

Technical Field

The present invention relates to a stator of a motor, and more particularly, to a stator of a motor capable of preventing the stator from loosening.

Background

The existing motor has a stator combined with a base, the stator has an iron core wound with a coil, a pin of the stator is combined with a circuit board through a hole of the base, the pin is electrically connected with the coil and the circuit board, and a rotor is rotatably combined with the stator. Thus, the coil can drive the rotor to rotate relative to the stator after being energized, similar to an embodiment of the conventional motor disclosed in chinese publication No. 1409888 entitled "outer rotor brushless dc motor".

However, although the stator of the conventional motor can be electrically connected to the circuit board through the pin, when the motor is started, the pin is easily unstable due to large starting torque, so that the stator is loosened, and a serious person may cause poor electrical connection of the pin, thereby affecting the performance and the service life of the motor.

In view of the above, there is a need for an improved motor.

Disclosure of Invention

In order to solve the above problems, an object of the present invention is to provide a motor stator, which can prevent the stator from loosening or poor electrical connection due to an excessive starting torque.

An object of the present invention is to provide a motor stator which can improve assembling convenience.

An object of the present invention is to provide a motor stator capable of reducing vibration generated during operation of a motor and noise generated by transmission of the vibration.

The motor stator of the present invention includes: a base having a positioning hole at an outer periphery of a shaft coupling portion; the winding group is provided with a magnetic pole piece combined with an insulating piece, a coil is wound on the insulating piece, at least one positioning convex column is connected with the insulating piece, the positioning convex column penetrates through the positioning hole, and the positioning convex column is not electrically connected with the coil; and the elastic bundle external member is sleeved with the positioning convex column and is abutted against the inner wall of the positioning hole.

Therefore, the motor stator of the invention utilizes the at least one positioning convex column to penetrate through the at least one positioning hole, and the at least one elastic beam sleeve piece is sleeved on the positioning convex column and is abutted against the inner wall of the positioning hole, so that the winding set can be stably combined with the base, and the elastic beam sleeve piece can absorb vibration energy to reduce the transmission of vibration; therefore, the problem that the winding set is loosened or poor in electrical connection caused by overlarge starting torque can be avoided, and the motor has the technical effects of improving the performance and prolonging the service life of the motor.

The insulating piece can be provided with a middle ring part which is annularly arranged on the periphery of the shaft connecting part, the pole corresponding parts are respectively connected with the middle ring part through one end, and the other end is connected with a pole shoe corresponding part; the winding group is provided with a plurality of winding posts which respectively protrude and penetrate out of corresponding parts of different pole shoes, and the winding posts are electrically connected with the coil and a circuit board. Therefore, the structure is simple, and the technical effect of convenience in assembly can be improved.

The positioning convex column can be positioned at the pole shoe corresponding part without the wire winding column. Therefore, the technical effect of avoiding mutual interference during winding so as to improve the operation convenience is achieved.

The positioning convex column can be positioned at the pole shoe corresponding part with the winding column. Therefore, the technical effect of enabling the stress of the corresponding part of the pole shoe to be more even is achieved.

The positioning convex column and the winding column are respectively positioned at two side ends of the corresponding part of the pole shoe. Therefore, the technical effect of improving the assembling convenience is achieved.

The base can be provided with a plurality of through holes, the winding posts respectively penetrate through the through holes and do not contact the inner walls of the through holes, the magnetic pole piece is positioned on one side of the base, the circuit board is positioned on the other side of the base, and a buffer piece is arranged between the circuit board and the base. Therefore, the buffer piece has the technical effect of preventing the vibration force of the winding set from being transmitted to the base.

The number of the positioning convex columns can be multiple, the elastic bundle sleeve is annular and is provided with a plurality of combination holes, and the combination holes are respectively sleeved with the positioning convex columns. Therefore, the elastic bundle external member can be simultaneously combined with the plurality of positioning convex columns, and the technical effect of improving the assembling convenience is achieved.

The number of the positioning convex columns can be multiple, and the elastic bundle external member is provided with a plurality of combination holes which are respectively sleeved with the positioning convex columns. Therefore, the technical effect of improving the stable combination of the winding set and the base is achieved.

The number of the positioning convex columns and the number of the elastic beam external members can be multiple, and each elastic beam external member is sleeved with the corresponding positioning convex column through a combination hole. Therefore, the technical effect of improving the stable combination of the winding set and the base is achieved.

Wherein, the positioning convex column can be integrally formed and connected with the insulating part. Therefore, the technical effect of improving the structural strength of the positioning convex column is achieved.

Wherein, the positioning convex column can be assembled and combined with the insulating part. Therefore, the technical effect of changing the size of the positioning convex column according to actual requirements is achieved.

Wherein, this coupling portion can have an central siphon, and this insulating part can have one and be located a lower insulating cover and one of the both ends of this magnetic pole piece respectively and go up insulating cover, and an elastic ring is located under this between insulating cover and this central siphon, and another elastic ring is located this between insulating cover and this central siphon. Thus, the two elastic rings have the technical effect of absorbing the vibration generated by the magnetic pole piece.

Wherein the pole piece may not contact the outer circumferential surface of the shaft tube. Therefore, the technical effect of preventing the vibration generated by the magnetic pole piece from being transmitted to the axle tube is achieved.

Drawings

Fig. 1 is an exploded perspective view of a rotor according to a first embodiment of the present invention.

Fig. 2 is an assembled sectional view of the first embodiment of the present invention in combination with a rotor.

Fig. 3 is an exploded perspective view illustrating the positioning post of the first embodiment of the present invention assembled to the insulating member.

Fig. 4 is an exploded perspective view of a second embodiment of the present invention.

Fig. 5 is an exploded perspective view of a third embodiment of the present invention.

Fig. 6 is an exploded perspective view of a fourth embodiment of the present invention.

Description of the reference numerals

(present invention)

1 base

11 shaft part 111 shaft tube

112 axle tube combining part 12 positioning hole

13 perforation

2 winding group

21 pole piece 22 insulation

22a lower insulating sleeve 22b upper insulating sleeve

221 middle ring part 222 pole corresponding part

223 pole shoe corresponding part 23 coil

24 positioning convex column 25 coiling column

3 elastic bundle external member

31 coupling hole 32 through hole

4 elastic ring

5 Circuit Board

6 buffer

R rotor R1 permanent magnet set.

Detailed Description

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below:

the following directional terms or their similar terms, such as "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "side", etc., refer to the directions of the drawings, and are used only for the purpose of describing and understanding the embodiments of the present invention, and are not intended to limit the present invention.

Referring to fig. 1, a stator of a motor according to a first embodiment of the present invention includes a base 1, a winding set 2 and at least one elastic bundle external member 3, wherein the winding set 2 and the elastic bundle external member 3 are combined with the base 1.

Referring to fig. 1 and 2, the base 1 may have various shapes, and the base 1 may be combined with the winding set 2. The base 1 has a shaft coupling portion 11 to which a rotor R is rotatably coupled; the coupling portion 11 may have a shaft tube 111 that accommodates components such as bearings, and the coupling portion 11 may be formed by integrally molding the shaft tube 111 with the base 1. The axle tube 111 can be formed by extending the middle portion of the base 1 upward, or as shown in the drawings of the embodiment, the axle connecting portion 11 further has an axle tube coupling portion 112, the axle tube coupling portion 112 can be integrally formed by the base 1, the axle tube coupling portion 112 can also be assembled and fixed in a hole in the middle of the base 1, and the axle tube 111 is then assembled and coupled to the axle tube coupling portion 112. In this embodiment, the shaft tube 111 is preferably made of metal, and the shaft tube coupling portion 112 is made of a slightly elastic material, so as to serve as a positioning member and a member for absorbing vibration of the shaft tube 111. The base 1 further has at least one positioning hole 12 and a plurality of through holes 13 distributed on the periphery of the coupling portion 11, and the plurality of through holes 13 are spaced from the positioning hole 12.

The winding set 2 is mainly combined and fixed on the outer circumference of the shaft tube 111 of the base 1. The winding group 2 has a magnetic pole piece 21, and the magnetic pole piece 21 can be formed by axially stacking a plurality of silicon steel sheets or directly formed by forming a magnetic conductive material (such as soft magnetic powder). The center of the pole piece 21 forms a hole for penetrating the shaft tube 111, and the pole piece 21 preferably does not contact the outer circumferential surface of the shaft tube 111 to prevent vibrations from being transmitted therethrough.

The winding set 2 further has an insulating member 22 combined with the pole piece 21, and is wound around the insulating member 22 through a coil 23, so that the insulating member 22 can be positioned between the pole piece 21 and the coil 23, and a short circuit between the coil 23 and the pole piece 21 is avoided. In this embodiment, the insulating member 22 may have a lower insulating sleeve 22a and an upper insulating sleeve 22b, the lower insulating sleeve 22a and the upper insulating sleeve 22b may be respectively located at two axial ends of the magnetic pole piece 21, and the lower insulating sleeve 22a and the upper insulating sleeve 22b together cover the magnetic pole piece 21 and allow the coil 23 to be wound. In addition, the motor stator of the present embodiment may further include two elastic rings 4, wherein one elastic ring 4 is located between the lower insulating sleeve 22a and the shaft tube 111, and the other elastic ring 4 is located between the upper insulating sleeve 22b and the shaft tube 111; preferably, the lower insulation sleeve 22a and the upper insulation sleeve 22b can be selected to be tightly fitted and combined with the shaft tube 111 through the two elastic rings 4 so as to be fixedly combined with the predetermined position of the outer circumference of the shaft tube 111.

On the other hand, the lower insulating sleeve 22a may have a middle ring portion 221 annularly disposed on the outer circumference of the shaft tube 111, the lower insulating sleeve 22a has a plurality of pole corresponding portions 222 respectively connected to the middle ring portion 221 through one end, and the other ends of the plurality of pole corresponding portions 222 are respectively connected to a pole-shoe corresponding portion 223. The winding set 2 has at least one positioning pillar 24, the at least one positioning pillar 24 is made of a material without conductivity, and the at least one positioning pillar 24 is not electrically connected with the coil 23. Wherein, the positioning convex column 24 can be connected to the lower insulating sleeve 22a of the insulating member 22, and the positioning convex column 24 can be located at any position of the middle ring part 221, the pole corresponding part 222 or the pole shoe corresponding part 223; preferably, the positioning boss 24 can be selectively located on the pole piece corresponding portion 223 and further away from the shaft tube 111. It should be noted that the positioning convex pillar 24 may be integrally connected to the insulating member 22 as shown in fig. 1, or the positioning convex pillar 24 and the insulating member 22 may be two members as shown in fig. 3, and the positioning convex pillar 24 is assembled to the insulating member 22. The number of the positioning convex columns 24 can match the number of the positioning holes 12 of the base 1, so that each positioning convex column 24 can be inserted and positioned in each positioning hole 12.

Referring to fig. 1 and 2 again, the winding group 2 may have a plurality of winding posts 25, each winding post 25 may protrude from a different pole shoe corresponding portion 223, the plurality of winding posts 25 may be made of a conductive material, so that the coil 23 and a circuit board 5 may be electrically connected through the plurality of winding posts 25; in the present embodiment, the number of the winding posts 25 is less than the number of the pole shoe corresponding portions 223, so the positioning studs 24 can be selectively located at the pole shoe corresponding portions 223 without the winding posts 25, and the positioning studs 24 are not electrically connected to the coil 23, the circuit board 5 or other electrical appliances. In addition, in the present embodiment, the circuit board 5 and the magnetic pole piece 21 are selectively located at two sides of the base 1, so the plurality of winding posts 25 can respectively penetrate through the plurality of through holes 13 of the base 1 without contacting the inner walls of the plurality of through holes 13, so as to be electrically connected to the circuit board 5. It should be noted that a buffer 6 may be disposed between the circuit board 5 and the base 1, and the buffer 6 is preferably made of elastic material such as rubber or silica gel, so as to reduce the vibration transmission between the circuit board 5 and the base 1.

The at least one elastic bundle member 3 may be made of an elastic material such as rubber or silicone. The elastic bundle external member 3 may have a combination hole 31 for engaging the positioning boss 24, and the elastic bundle external member 3 abuts against the inner wall of the positioning hole 12; wherein, the elastic bundle external member 3 is tightly matched and combined with the positioning convex column 24 and the inner wall of the positioning hole 12.

With the above structure, the coil 23 will generate an induced magnetic field after being energized, so that the magnetic pole piece 21 can generate a magnetic linkage with one permanent magnet group R1 of the rotor R, and the rotor R can rotate relative to the winding group 2. Because the positioning convex column 24 of the motor stator is used as an independent component for combination action, the positioning convex column 24 is not electrically connected with the coil 23, the circuit board 5 or other electrical appliances, therefore, the positioning convex column 24 penetrates through the positioning hole 12, the winding set 2 can be stably combined with the base 1, the winding set 2 is prevented from loosening, vibration is absorbed by the elastic bundle external member 3 combined between the positioning convex column 24 and the inner wall of the positioning hole 12, the transmission of vibration is reduced, and the noise generated by the vibration is reduced.

In addition, when the motor is running, the two elastic rings 4 can also absorb the vibration generated by the magnetic pole piece 21, so as to prevent the vibration from being transmitted to the shaft tube 111; and, the shock is absorbed by the buffer 6, so as to prevent the shock force of the winding set 2 from being transmitted to the base 1 through the circuit board 5, and prevent the plurality of winding posts 25 from impacting the base 1 and being damaged. And since the positioning protruding pillar 24 is located at the pole shoe corresponding portion 223 and is far away from the axle tube 111, the combination of the winding set 2 and the base 1 can be more stable, so as to improve the stability of the motor rotation.

Referring to fig. 4, which is a second embodiment of the motor stator of the present invention, the number of the positioning convex columns 24 is plural, and the elastic beam set 3 has plural combining holes 31 respectively fitted with the plural positioning convex columns 24; in the present embodiment, the number of the positioning studs 24 and the combination holes 31 is two, and the two positioning studs 24 are located at two ends of the same pole shoe corresponding portion 223. The two elastic bundle external members 3 combined between the two positioning convex columns 24 and the inner walls of the two positioning holes 12 can absorb shock, so that the winding set 2 can be stably combined with the base 1, and the situation that the winding set 2 is loosened can be avoided.

Referring to fig. 5, which is a third embodiment of the motor stator of the present invention, the number of the positioning convex columns 24 and the number of the elastic beam sets 3 are both multiple, in this embodiment, the number of the positioning convex columns 24 and the number of the elastic beam sets 3 are described as two; the two positioning studs 24 are located on the pole shoe corresponding portion 223 having the winding stud 25, and the positioning studs 24 and the winding stud 25 are respectively located on two side ends of the pole shoe corresponding portion 223. Therefore, the two positioning convex columns 24 corresponding to the two combining holes 31 of the two elastic bundle external members 3 are sleeved, and because the two positioning convex columns 24 are opposite in the radial direction, the combining force between the winding group 2 and the base 1 is distributed evenly, so that the stability of combining the winding group 2 with the base 1 can be improved.

Referring to fig. 6, which is a fourth embodiment of the motor stator of the present invention, the number of the positioning studs 24 is multiple, in this embodiment, the number of the positioning studs 24 is four for illustration, and each positioning stud 24 is located at each pole shoe corresponding portion 223. In addition, the elastic bundle external member 3 is annular, and a plurality of combining holes 31 of the elastic bundle external member 3 are respectively sleeved with the plurality of positioning convex columns 24; the elastic bundle member 3 may further have a plurality of through holes 32, and the plurality of winding posts 25 extend through the plurality of through holes 32. Thus, the annular elastic bundle external member 3 can be directly combined with the plurality of positioning convex columns 24, and the technical effect of improving the assembling convenience is achieved.

In summary, in the motor stator of the present invention, the at least one positioning protrusion penetrates through the at least one positioning hole, and the at least one elastic beam assembly is sleeved on the positioning protrusion and abuts against the inner wall of the positioning hole, so that the winding set can be stably combined to the base, and the elastic beam assembly can absorb vibration energy to reduce the transmission of vibration; therefore, the problem that the winding set is loosened or poor in electrical connection caused by overlarge starting torque can be avoided, and the motor has the technical effects of improving the performance and prolonging the service life of the motor.

Claims

1. A motor stator, comprising:

a base having at least one positioning hole located at an outer periphery of a shaft coupling portion;

the winding group is provided with a magnetic pole piece combined with an insulating piece, a coil is wound on the insulating piece, at least one positioning convex column is connected with the insulating piece, the positioning convex column penetrates through the positioning hole, and the positioning convex column is not electrically connected with the coil; and

at least one elastic bundle external member, which is sleeved with the positioning convex column and is abutted against the inner wall of the positioning hole.

2. The motor stator according to claim 1, wherein the insulating member has a middle ring portion annularly disposed at an outer periphery of the coupling portion, and a plurality of pole corresponding portions are respectively connected to the middle ring portion through one end and to a pole shoe corresponding portion through the other end; the winding group is provided with a plurality of winding posts which respectively protrude and penetrate out of corresponding parts of different pole shoes, and the winding posts are electrically connected with the coil and a circuit board.

3. The motor stator as claimed in claim 2, wherein the positioning boss is located at the pole shoe corresponding portion without the winding post.

4. The motor stator as claimed in claim 2, wherein the positioning boss is located at the pole shoe corresponding portion having the winding post.

5. The motor stator as claimed in claim 4, wherein the positioning boss and the winding boss are respectively located at both side ends of the corresponding portion of the pole piece.

6. The motor stator as claimed in claim 2, wherein the base has a plurality of through holes, the plurality of winding posts respectively pass through the plurality of through holes without contacting the inner walls of the plurality of through holes, the magnetic pole piece is located at one side of the base, the circuit board is located at the other side of the base, and a buffer member is provided between the circuit board and the base.

7. The motor stator as claimed in claim 2, wherein the number of the positioning protrusions is plural, the elastic collar member is annular and has plural coupling holes, and the plural coupling holes are respectively coupled to the plural positioning protrusions.

8. The motor stator as claimed in claim 1, wherein the number of the positioning bosses is plural, and the elastic bundle member has a plurality of coupling holes respectively fitted with the positioning bosses.

9. The motor stator as claimed in claim 1, wherein the number of the positioning bosses and the elastic beam sleeves is plural, and each elastic beam sleeve is engaged with the corresponding positioning boss through a coupling hole.

10. The motor stator as claimed in any one of claims 1 to 9, wherein the positioning boss is integrally formed with the insulating member.

11. The motor stator as claimed in any one of claims 1 to 9, wherein the positioning boss is assembled with the insulator.

12. The motor stator as claimed in any one of claims 1 to 9, wherein the coupling portion has a shaft tube, the insulating member has a lower insulating sleeve and an upper insulating sleeve respectively located at both ends of the pole piece, one elastic ring is located between the lower insulating sleeve and the shaft tube, and the other elastic ring is located between the upper insulating sleeve and the shaft tube.

13. The motor stator as claimed in claim 12, wherein the pole piece does not contact the outer circumferential surface of the shaft tube.