CN218940790U

CN218940790U - Motor stator and motor

Info

Publication number: CN218940790U
Application number: CN202223120114.9U
Authority: CN
Inventors: 李俊; 苏健; 薛佳仪; 刘越华
Original assignee: Huaxincheng Technology Taicang Co ltd
Current assignee: Huaxincheng Technology Taicang Co ltd
Priority date: 2022-11-23
Filing date: 2022-11-23
Publication date: 2023-04-28
Anticipated expiration: 2032-11-23

Abstract

The utility model discloses a motor stator, which comprises a silicon steel sheet group, an insulating component, a winding and a circuit board for providing a motor driving circuit, wherein the silicon steel sheet group is provided with a circular ring part, a plurality of magnetic pole parts uniformly arranged on the outer periphery of the circular ring part, the insulating component is provided with an upper insulating frame fixed on the upper side of the silicon steel sheet group and a lower insulating frame fixed on the lower side of the silicon steel sheet group, the lower insulating frame is provided with a plurality of extension arms for covering the magnetic pole parts and a ring wall positioned on the inner side of the extension arms, the ring wall is provided with a yielding part, the yielding part is positioned between two adjacent magnetic pole parts, the yielding part is an inclined surface and is inclined towards the side where the extension arms are positioned from the end surface, the winding is wound on the magnetic pole parts to form a first winding, the insulating component is arranged between the first winding and the corresponding magnetic pole part, and the first winding is electrically connected with the circuit board, so that the winding easy to hang on the ring wall moves between the ring wall and the ring wall through the yielding part.

Description

Motor stator and motor

Technical Field

The utility model belongs to the technical field of cooling fan structures, and particularly relates to a motor stator and a motor.

Background

For devices with heat generating elements (e.g., mechanical devices, electronic products, etc.), with the rapid operation of the devices, the requirements for heat dissipation efficiency generated when the fan is operated are increasing.

However, when the existing fan is used for producing the motor stator, in the production process that the winding is wound on the magnetic pole part, after the winding is wound on the first magnetic pole part to form a winding, when the winding is started to be wound on the other magnetic pole part, part of the winding is easy to hang on the annular wall of the insulating frame, and when the next process (namely, the circuit board is welded), the circuit board presses the winding hung on the annular wall to cause leakage risk, thereby influencing the output power of the fan during operation and further influencing the heat dissipation efficiency generated during the fan operation.

Accordingly, in view of the above-mentioned problems, it is necessary to provide a new motor stator.

Disclosure of Invention

The utility model aims to provide a motor stator which can effectively solve the technical problems.

The technical scheme for solving the technical problems is as follows:

a motor stator comprising:

the silicon steel sheet group is provided with a circular ring part and a plurality of magnetic pole parts uniformly arranged on the outer periphery of the circular ring part, and an axial direction and a radial direction are defined;

an insulating member having a ring wall bonded above and/or below the annular portion, the ring wall being formed with an end face away from the annular portion in an axial direction;

at least one abdication part formed on the outer side surface of one end of the annular wall far away from the annular part along the axial direction;

the radial minimum width of the end face at the position of the abdication part is smaller than the radial minimum width of other areas except the abdication part.

Preferably, the abdication part is an inclined plane.

Preferably, the relief portion is located between two adjacent magnetic pole portions.

Preferably, at least six magnetic pole parts are provided, each magnetic pole part is wound with a first winding, and the insulating part is arranged between the first winding and the corresponding magnetic pole part.

Preferably, the first windings on the two magnetic pole parts on both sides of the abdication part are arranged in series, and the winding directions are consistent.

Preferably, the magnetic pole part defines a first magnetic pole part, a second magnetic pole part, a third magnetic pole part and a fourth magnetic pole part which are adjacent, and the abdication part is arranged between at least the first magnetic pole part and the second magnetic pole part;

the first winding on the first magnetic pole part and the first winding on the fourth magnetic pole part are arranged in series, and the winding directions are consistent.

Preferably, the motor stator further comprises a circuit board, the ring wall of the insulating part, which is close to one side of the circuit board, is provided with the abdication part, the ring wall is further provided with a positioning convex column, and the positioning convex column and the abdication part are arranged in a dislocation manner.

Preferably, the circuit board is provided with an insertion hole, and the positioning convex column is accommodated in the insertion hole.

Preferably, the insulating member further has a plurality of extension arms covering the magnetic pole portion, an outer end of each extension arm is further provided with an annular wall, and each annular wall is provided corresponding to the annular wall.

The utility model also discloses the following technical scheme:

a motor, comprising:

a base plate, incorporating a fan frame, the fan frame surrounding the base plate;

a shaft tube coupled to the bottom plate;

the motor stator is sleeved on the periphery of the shaft tube;

the rotor is provided with a hub and a rotating shaft arranged on the hub, the rotor is rotationally combined with the shaft tube through the rotating shaft, the rotor is provided with a magnetic element, and a magnetic induction gap is formed between the magnetic element and the stator assembly.

The utility model has the beneficial effects that:

compared with the prior art, the motor stator is characterized in that the abdication part is arranged on the annular wall, so that when the winding wire is wound on the magnetic pole part to form the first winding, the winding wire which is easy to hang on the annular wall moves to the outer side surface of the annular wall through the abdication part.

Drawings

The utility model will be further described with reference to the following drawings and examples, in which:

FIG. 1 is a cross-sectional view of a motor structure disclosed herein;

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

FIG. 3 is a schematic view of the lower insulator bracket shown in FIG. 2 at another angle;

fig. 4 is a schematic plan view of the lower insulating frame shown in fig. 3.

Detailed Description

In order to make the objects, technical solutions and advantages of the present utility model more apparent, the present utility model will be further described in detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

Referring to fig. 1 to 4, a first embodiment of a motor of the present application is shown, and the motor includes a fan frame, a motor stator 20 and a rotor 30. The fan frame is internally combined with a bottom plate 11, an air inlet and an air outlet are formed, a shaft tube 13 is arranged on the bottom plate 11, a bearing is arranged in the shaft tube 13, a motor stator 20 is sleeved on the periphery of the shaft tube 13, a rotor 30 is provided with a hub 31 and a rotating shaft 32 arranged on the hub 31, the rotor 30 is rotationally combined with the shaft tube 13 through the rotating shaft 32, the rotating shaft 32 penetrates through the bearing, a magnetic element 33 is arranged on the rotor 30, and the magnetic element 33 is arranged on the inner periphery of the hub 31 and forms a magnetic induction gap with the motor stator 20. The magnetic element 33 and the motor stator 20 can generate attractive and repulsive magnetic force to drive the rotor to rotate, and the magnetic element 33 can be a ring magnet in this application.

Specifically, the motor stator 20 includes a silicon steel sheet set 21, a circuit board 22, windings 23 and positioning elements. The silicon steel sheet group 21 is composed of a stack of a plurality of silicon steel sheets, and is formed with six of the magnetic pole portions 211. The silicon steel sheet set 21 comprises a circular ring portion and six magnetic pole portions 211 uniformly arranged on the outer periphery of the circular ring portion. The number of the magnetic pole portions 211 is not limited in this application.

Specifically, the winding wire 23 is wound on the six magnetic pole portions 211 to form six first windings 212, and an insulating member is disposed between the first windings 212 and the silicon steel sheet set 21. The insulating member is an upper insulating frame 24 provided on the upper side of the silicon steel sheet group 21, and a lower insulating frame 25 provided on the lower side of the silicon steel sheet group 21. The upper insulating frame 24 and the lower insulating frame 25 are made of plastic materials, and the structure and the shape of the upper insulating frame 24 and the lower insulating frame 25 are approximately similar, and the silicon steel sheet group 21 is clamped and coated between the upper insulating frame 24 and the lower insulating frame 25. The positions of the upper insulating frame 24 and the lower insulating frame 25 opposite to the upper magnetic pole portion 211 of the silicon steel sheet set 21 are respectively provided with

corresponding extension arms

241 and 251 and

annular walls

242 and 252 positioned on the inner sides of the

extension arms

241 and 251,

annular walls

243 and 253 are further formed at the outer ends of the

extension arms

241 and 251, and

protective walls

244 and 254 similar to the outline of the silicon steel sheet set 21 are arranged on the surfaces of the upper insulating frame 24 and the lower insulating frame 25 opposite to the silicon steel sheet set 21, and the

annular walls

242 and 252 are respectively and correspondingly arranged with the

annular walls

243 and 253 along the radial direction. Along the axial direction, the

annular walls

242, 252 are respectively bonded above and below the annular portion. In this application, the extension arm 241, the annular wall 242, the annular wall 243, and the retaining wall 244 of the upper insulating frame 24 and the extension arm 251, the annular wall 252, the annular wall 253, and the retaining wall 254 of the lower insulating frame 25 together form a winding path for winding the first winding 212. So as to reduce the influence on the external environment and improve the protection. In this application, the upper insulating frame 24 and the lower insulating frame 25 are preferably integrally formed.

Specifically, the annular wall 253 of the lower insulating frame 25 is provided with a pin protruding toward the circuit board 22, the center of the pin is provided with a groove 2531, and the groove 2531 can be penetrated by a positioning element to fix the assembled upper insulating frame 24, lower insulating frame 25 and silicon steel sheet set 20 on the circuit board 22; meanwhile, the circuit board 22 is provided with a positioning hole 221 for accommodating the positioning element, so as to form a combination positioning by welding; furthermore, one winding end of the three first windings 212 is fixed on the corresponding positioning element, so that the three first windings 212 are in contact with the motor driving circuit on the circuit board 22; still alternatively, the annular wall 252 of the lower insulating frame 25 is further provided with three positioning posts 2522, and the circuit board 22 is provided with three insertion holes 222 accommodated in the positioning posts 2522, so that the three positioning posts 2522 are respectively clamped and combined in the three insertion holes 222 to realize positioning and limiting effects.

Specifically, a relief portion 2521 is further disposed on the annular wall 252 of the lower insulating frame 25 (or on the annular wall 242 of the upper insulating frame 24), and the relief portion 2521 is formed on an outer side surface of one end of the annular wall 252 away from the annular portion in the axial direction. The relief portion 2521 located on the top surface (the end surface away from the annular portion in the axial direction) of the annular wall 252 has a radial minimum width D, and the other areas of the top surface except for the relief portion 2521 also have a radial minimum width D, and the radial minimum width D is smaller than the radial minimum width D. The configuration of the relief portion 2521 enables the winding wire 23 which is easy to hang on the annular wall 252 to move between the annular wall 252 and the annular wall 253. Preferred in this application are: the offset portion 2521 is disposed between two adjacent magnetic pole portions, and the offset portion 2521 and the positioning boss 2522 are offset.

Specifically, the abdication portion 2521 is an inclined surface, and the inclined surface may be a plane or a curved surface or a combination of a plane and a curved surface; the yielding portion 2521 is preferably a plane, and has a simple structure and is convenient to manufacture.

In the first embodiment, referring to fig. 3 and 4, the six magnetic pole portions 212 are sequentially a first magnetic pole portion, a second magnetic pole portion, a third magnetic pole portion, a fourth magnetic pole portion, a fifth magnetic pole portion and a sixth magnetic pole portion in a clockwise (or counterclockwise) direction, the first windings 212 respectively wound on the six magnetic pole portions 212 are defined as a winding A1, a winding A2, a winding A3, a winding A4, a winding A5 and a winding A6, and the six first windings 212 are electrically connected to the circuit board 22 in a star connection manner. Wherein there is: the winding A1 and the winding A4 are arranged in series, and the winding directions are consistent; the winding A2 and the winding A5 are arranged in series, and the winding directions are consistent; the winding A3 and the winding A6 are arranged in series, and the winding directions are consistent. In this application, three abdicating portions 2521 are provided, and the three abdicating portions 2521 are respectively located between the winding A1 and the winding A2 (i.e. the first magnetic pole portion and the second magnetic pole portion), between the winding A2 and the winding A3 (i.e. the second magnetic pole portion and the third magnetic pole portion), and between the winding A3 and the winding A4 (i.e. the third magnetic pole portion and the fourth magnetic pole portion), so that the winding 23 easily hung on the annular wall 252 moves between the annular wall 252 and the annular wall 253 through the notch 2521, thereby reducing the leakage risk.

In the first embodiment, there is another case that when the number of the magnetic pole portions 211 is greater than six, the first windings 212 on the two magnetic pole portions 211 at both sides of the step-down portion 2521 are also arranged in series, and the winding directions are consistent, so that the partial winding 23 between the two first windings 212 at both sides of the step-down portion 2521 is not easy to hang on the annular wall 252.

In another embodiment, the first windings 212 on the six pole portions 212 are electrically connected to the circuit board 22 in a delta connection. Wherein there is: the winding A1 and the winding A2 are arranged in series, and the winding directions are consistent; the winding A3 and the winding A4 are arranged in series, and the winding directions are consistent; the winding A5 and the winding A6 are arranged in series, the winding direction is consistent, and three abdicating portions 2521 are also arranged on the annular wall 252 on the lower insulating frame 25, wherein the three abdicating portions 2521 are respectively located between the winding A1 and the winding A2 (i.e. the first magnetic pole portion and the second magnetic pole portion), the winding A3 and the winding A4 (i.e. the third magnetic pole portion and the fourth magnetic pole portion), and the winding A5 and the winding A6 (i.e. the fifth magnetic pole portion and the sixth magnetic pole portion), and the effects thereof are the same as those of the first embodiment, so that the description thereof is omitted.

In summary, the present utility model discloses a motor stator and a motor, wherein a yielding portion is disposed on a ring wall, so that when a winding is wound on a magnetic pole portion to form a first winding, a portion of the winding which is easy to hang and located on the ring wall is moved between the ring wall and the ring wall through the yielding portion, and when the motor is assembled, the first winding located in a winding channel and the portion of the winding located between the ring wall and the ring wall are not easy to be affected by external environment, thereby stabilizing output power of the motor.

Claims

1. A motor stator, comprising:

at least one abdication part formed on the outer side surface of one end of the annular wall far away from the annular part along the axial direction; the radial minimum width of the end face at the position of the abdication part is smaller than the radial minimum width of other areas except the abdication part.

2. A motor stator according to claim 1, wherein the relief portion is an inclined plane.

3. A motor stator according to claim 1, wherein the relief portion is located between two adjacent pole portions.

4. A motor stator according to claim 3, wherein at least six of the magnetic pole portions are provided, and each of the magnetic pole portions is wound with a first winding, and the insulating member is provided between the first winding and the corresponding magnetic pole portion.

5. The motor stator according to claim 4, wherein the first windings on the two magnetic pole portions on both sides of the relief portion are arranged in series with the winding directions being identical.

6. The motor stator according to claim 4, wherein the magnetic pole portions define adjacent first, second, third, and fourth magnetic pole portions, and the relief portion is provided between at least the first and second magnetic pole portions;

7. The motor stator according to claim 1, further comprising a circuit board, wherein the insulation member is provided with the relief portion on a ring wall adjacent to one side of the circuit board, and the ring wall is further provided with a positioning boss, and the positioning boss and the relief portion are arranged in a staggered manner.

8. The motor stator according to claim 7, wherein the circuit board is provided with an insertion hole, and the positioning boss is accommodated in the insertion hole.

9. A motor stator according to claim 1, wherein the insulating member further has a plurality of extension arms covering the magnetic pole portion, an outer end of each of the extension arms is further provided with an annular wall, and each of the annular walls is provided in correspondence with the annular wall.

10. A motor, comprising:

a shaft tube coupled to the bottom plate;

the motor stator according to any one of claims 1 to 9, being fitted around the outer circumference of the shaft tube;