CN112787428B

CN112787428B - Stator core and motor

Info

Publication number: CN112787428B
Application number: CN202011550490.4A
Authority: CN
Inventors: 毛鑫; 纪泽轩; 兰元鹏; 丁佳婷
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2020-12-24
Filing date: 2020-12-24
Publication date: 2022-01-04
Anticipated expiration: 2040-12-24
Also published as: CN112787428A

Abstract

The application provides a stator core, motor, including yoke portion and tooth portion, be provided with first pole shoe and second pole shoe on the tooth portion, first pole shoe is L1 at the ascending length of stator core's circumferential direction, the ascending length of second pole shoe in stator core's circumferential direction is L2, and L1 > L2, be provided with the mounting groove on the yoke portion, first pole shoe with the second pole shoe can set up selectively in the mounting groove. The application provides a stator core, motor, the width of change notch that can be selective makes the different performance requirements of motor adaptation, increases the stator core commonality.

Description

Stator core and motor

Technical Field

The application belongs to the technical field of motors, and particularly relates to a stator core and a motor.

Background

In the prior art, the sizes of stator cores corresponding to motors of different models are different, and the situation that one type of motor is matched with one type of stator core appears. The performance of motor is related to stator core's notch width, and prior art stator core's notch is fixed, can not the width of the change notch of adaptability, has caused the poor problem of current stator core commonality.

Disclosure of Invention

Therefore, the technical problem that this application will be solved lies in providing a stator core, motor, the width of change notch that can be selective makes the motor adapt to different performance requirements, increases the stator core commonality.

In order to solve the above problems, the present application provides a stator core including a yoke portion and a tooth portion, the tooth portion being provided with a first pole shoe and a second pole shoe, the first pole shoe having a length in a circumferential direction of the stator core of L1, the second pole shoe having a length in a circumferential direction of the stator core of L2, L1 > L2, the yoke portion being provided with an installation groove, the first pole shoe and the second pole shoe being selectively provided in the installation groove.

Optionally, the tooth portion further includes a stator tooth, the first pole shoe is disposed on one end of the stator tooth, and the second pole shoe is disposed on the other end of the stator tooth.

Optionally, the shape of the mounting groove is matched with the shape of the first pole shoe.

Optionally, the yoke portion includes a plurality of splicing sections, and a plurality of splicing sections are connected end to form an annular structure.

Optionally, the shape and size of each splicing section are the same.

Optionally, each of the splicing sections is provided with one mounting groove, and the splicing sections and the tooth portions are arranged in a one-to-one correspondence manner.

Optionally, a first connecting section and a second connecting section are arranged on the splicing section, and the first connecting section is connected with the second connecting section in the adjacent splicing section.

Optionally, a first connection groove is formed in the inner side wall of the first connection section, a second connection groove is formed in the outer side wall of the second connection section, the first connection groove in the first connection section is opposite to the second connection groove in the second connection section, an insertion space is formed, and a plug pin piece is inserted into the insertion space.

Optionally, when the second pole shoes are arranged in the mounting groove, the adjacent first pole shoes are abutted to form an annular structure.

In another aspect of the present application, there is provided an electric machine including the stator core as described above.

Advantageous effects

The stator core and the motor provided by the embodiment of the invention can selectively change the width of the notch, so that the motor can adapt to different performance requirements, and the universality of the stator core is improved.

Drawings

FIG. 1 is a schematic structural diagram of a segment and a tooth according to an embodiment of the present disclosure;

FIG. 2 is an exploded view of a splice section and teeth of an embodiment of the present application;

FIG. 3 is a schematic structural view of a first pole piece of an embodiment of the present application disposed in a mounting groove;

FIG. 4 is a schematic perspective view of a first pole piece disposed in an installation slot according to an embodiment of the present disclosure;

FIG. 5 is a schematic structural view of the second pole piece of the embodiment of the present application disposed in the mounting groove;

fig. 6 is a perspective view of a latch member according to an embodiment of the present disclosure.

The reference numerals are represented as:

1. splicing sections; 11. mounting grooves; 12. a first connection section; 121. a first connecting groove; 13. a second connection section; 131. a second connecting groove; 14. a plug space; 2. a tooth portion; 21. a first pole piece; 22. a second pole piece; 23. stator teeth; 3. a latch member.

Detailed Description

With reference to fig. 1 to 6 in combination, according to an embodiment of the present application, a stator core includes a yoke portion and a tooth portion 2, a first pole shoe 21 and a second pole shoe 22 are disposed on the tooth portion 2, a length of the first pole shoe 21 in a circumferential direction of the stator core is L1, a length of the second pole shoe 22 in the circumferential direction of the stator core is L2, L1 > L2, a mounting groove 11 is disposed on the yoke portion, and the first pole shoe 21 and the second pole shoe 22 can be selectively disposed in the mounting groove 11, so that a width of a slot opening can be selectively changed, a motor can meet different performance requirements, and universality of the stator core is increased. By changing the width of the notch, the problem that the cogging torque of the motor is too large due to the large width of the notch is solved. Different sizes of teeth 2 can provide different pole shoe and slot opening sizes, and the winding turns of the motor with different performance requirements meet the requirements of different slot filling ratios by matching the teeth 2 with different sizes.

In some embodiments, the first pole piece 21 and the second pole piece 22 are circular arcs, and L1 > L2 indicates that the arc length of the first pole piece 21 is greater than the arc length of the second pole piece 22.

In some embodiments, the arc of the first and

second pole pieces

21, 22 is the same.

The toothing 2 further comprises stator teeth 23, the first pole piece 21 being arranged on one end of the stator teeth 23 and the second pole piece 22 being arranged on the other end of the stator teeth 23.

In some embodiments, the winding wire is disposed on the stator teeth 23, the stator teeth 23 are in an elongated shape, the stator teeth 23, the first pole piece 21 and the second pole piece 22 form a tooth portion 2, the tooth portion 2 is in a symmetrical structure, and a symmetrical axis extends along a radial direction of the yoke portion.

In some embodiments, the first pole piece 21 is curved to open on a side away from the stator teeth 23, and the second pole piece 22 is curved to open on a side away from the stator teeth 23.

The shape of the mounting groove 11 is matched with the shape of the first pole piece 21.

In some embodiments, both the first pole piece 21 and the second pole piece 22 can be disposed within the mounting slot 11.

In some embodiments, after the first pole piece 21 is disposed in the installation groove 11, the outer wall of the first pole piece 21 is connected with the inner wall of the installation groove 11.

In some embodiments, when the second pole piece 22 is disposed in the mounting groove 11, the inner walls of the mounting groove 11 except for the inner walls at the two ends of the mounting groove 11 are all in contact with the second pole piece 22, so as to prevent the second pole piece 22 from shaking in the mounting groove 11.

In some embodiments, when the first pole piece 21 is disposed within the mounting slot 11, the slot of the mounting slot 11 abuts the outer wall of the end of the first pole piece 21 proximate to the stator teeth 23. When the second pole piece 22 is arranged in the mounting groove 11, the notch of the mounting groove 11 is in contact with the outer wall of one end of the second pole piece 22 close to the stator teeth 23.

Yoke portion includes a plurality of

splice sections

1, and 1 end to end of a plurality of splice sections form ring structure, through setting up yoke portion into a plurality of splice sections 1 and constitute to make tooth portion 2 can selectively set up on splice section 1, can realize coiling earlier and splice again, when making the iron core wire winding comparatively convenient, can also control the full rate of groove in a flexible way, both can realize low full rate of groove to the requirement of difference, also can realize high full rate of groove, improve the performance of motor.

In some embodiments, the ring formed by splicing the plurality of splice segments 1 is a yoke.

In some embodiments, the plurality of segments 1 are spliced to form a circular ring shape.

The shape and the size of each splicing section 1 are the same, so that the stress uniformity is ensured.

All be provided with an installation groove 11 on every splice section 1, splice section 1 and tooth portion 2 one-to-one setting further guarantee the homogeneity of atress.

In some embodiments, the teeth 2 are provided at a central position of the segment 1 in the arc direction.

The splicing section 1 is provided with a first connecting section 12 and a second connecting section 13, the first connecting section 12 is connected with the second connecting section 13 in the adjacent splicing section 1, and the stability of the splicing sections 1 during splicing is ensured.

In some embodiments, the first connecting section 12 is disposed on an outer circle of the splicing section 1, and the second connecting section 13 is disposed on an inner circle of the splicing section 1.

In some embodiments, as shown in fig. 1, the first connecting section 12 is disposed at the left end of the splicing section 1, and the second connecting section 13 is disposed at the right end of the splicing section 1.

The inner side wall of the first connecting section 12 is provided with a first connecting groove 121, the outer side wall of the second connecting section 13 is provided with a second connecting groove 131, the first connecting groove 121 on the first connecting section 12 and the second connecting groove 131 on the adjacent second connecting section 13 are arranged oppositely to form an inserting space 14, and the inserting pin piece 3 is inserted into the inserting space 14. Through setting up first connecting groove 121, second connecting groove 131 and bolt piece 3, the welding problem when having solved yoke portion rounding has improved the manufacturing process of motor. The splicing sections 1 can not be interfered when spliced, the last splicing section 1 can also be spliced, the welding process of the stator core when the stator core is rounded is omitted, the processing procedure is shortened, the production cost is reduced, and the production efficiency is improved. Meanwhile, seamless connection is realized, after the adjacent splicing sections 1 are spliced, a bolt piece 3 made of the same material as the connecting section is inserted into the splicing space 14 for limiting and fixing, so that the adjacent splicing sections 1 are firmly connected.

In some embodiments, the opening of the first connecting groove 121 is opposite to the opening of the second connecting groove 131, so as to form the plug space 14 with a diamond cross section, the plug space 14 is a strip-shaped channel, the plug member 3 is a plug with a diamond cross section, and after the plug member 3 is inserted into the plug space 14, the inner wall of the plug space 14 abuts against the outer wall of the plug member 3.

In some embodiments, the inner sidewall of the first connecting section 12 is a sidewall of the first connecting section 12 close to the center of the circle where the first connecting section 12 is located, and the outer sidewall of the second connecting section 13 is a sidewall of the second connecting section 13 far from the center of the circle where the second connecting section 13 is located.

When second pole shoe 22 sets up in mounting groove 11, adjacent first pole shoe 21 is inconsistent, forms ring structure, and the width of stator core's notch is zero this moment, and the notch disappears promptly, and the circle all is very smooth with the excircle face in the stator core, very big improvement the performance of motor.

In some embodiments, as shown in fig. 3, the first pole pieces 21 are in interference, that is, the left end of the first pole piece 21 is in interference with the right end of the left adjacent first pole piece 21, and the right end of the first pole piece 21 is in interference with the left end of the right adjacent first pole piece 21.

If a stator core with a notch is obtained, the operation can be carried out as follows, firstly, the tooth part 2 is overlapped and fixed on a tool for winding, and different slot fullness conditions can be selected according to requirements; secondly, the splicing sections 1 are fixed in a stacked height mode, then the first pole shoe 21 is assembled in the installation groove 11, a splicing block formed by combining the tooth part 2 and the splicing sections 1 is formed, and a plurality of splicing blocks are assembled; and thirdly, assembling the plurality of split blocks assembled in the second step, namely, firstly, radially overlapping the first connecting section 12 in one split block and the second connecting section 13 in the other split block, then inserting the bolt piece 3 into the inserting space 14 to achieve the effect of circumferential fixing, and continuously assembling in such a way to form the stator core.

If a stator core without a notch is obtained, the operation can be carried out as follows, firstly, the tooth part 2 is overlapped and fixed on a tool for winding, and different slot fullness conditions can be selected according to requirements; secondly, the splicing sections 1 are fixed in a stacked height mode, then the second pole shoe 22 is assembled in the installation groove 11, a splicing block formed by combining the tooth part 2 and the splicing sections 1 is formed, and a plurality of splicing blocks are assembled; and thirdly, assembling the plurality of split blocks assembled in the second step, namely, firstly, radially overlapping the first connecting section 12 in one split block and the second connecting section 13 in the other split block, and then inserting the bolt piece 3 into the inserting space 14 to achieve the effect of circumferential fixing, so that the stator core without the slot structure can be obtained.

In another aspect of the present embodiment, there is provided an electric motor including the stator core as described above.

It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.

The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed. The foregoing is only a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present application, and these modifications and variations should also be considered as the protection scope of the present application.

Claims

1. A stator core, characterized by comprising a yoke portion and a tooth portion (2), wherein a first pole shoe (21) and a second pole shoe (22) are arranged on the tooth portion (2), the length of the first pole shoe (21) in the circumferential direction of the stator core is L1, the length of the second pole shoe (22) in the circumferential direction of the stator core is L2, L1 > L2, a mounting groove (11) is arranged on the yoke portion, and the first pole shoe (21) and the second pole shoe (22) can be selectively arranged in the mounting groove (11);

the tooth portion (2) further comprises a stator tooth (23), the first pole piece (21) is arranged on one end of the stator tooth (23), and the second pole piece (22) is arranged on the other end of the stator tooth (23).

2. Stator core according to claim 1, characterized in that the shape of the mounting slot (11) is adapted to the shape of the first pole shoe (21).

3. The stator core according to claim 1, characterized in that the yoke part comprises a plurality of segments (1), the segments (1) being joined end to end forming an annular structure.

4. A stator core according to claim 3, characterized in that the shape and size of each segment (1) is the same.

5. The stator core according to claim 3, wherein each of the segments (1) is provided with one of the mounting slots (11), and the segments (1) are arranged in one-to-one correspondence with the teeth (2).

6. A stator core according to claim 3, characterized in that the splicing section (1) is provided with a first connecting section (12) and a second connecting section (13), the first connecting section (12) being connected with the second connecting section (13) in the adjacent splicing section (1).

7. The stator core according to claim 6, wherein a first connecting groove (121) is formed in an inner side wall of the first connecting section (12), a second connecting groove (131) is formed in an outer side wall of the second connecting section (13), the first connecting groove (121) in the first connecting section (12) is opposite to the second connecting groove (131) in the adjacent second connecting section (13) to form a plug space (14), and a plug member (3) is inserted into the plug space (14).

8. The stator core according to claim 1, characterized in that when the second pole shoe (22) is disposed in the mounting groove (11), the adjacent first pole shoes (21) are in contact to form a ring structure.

9. An electrical machine comprising a stator core according to any one of claims 1-8.