Stator core

Abstract

The utility model discloses a stator core. The technical key points are that the punching sheet structure comprises a plurality of punching sheets and a positioning support, the positioning support is cylindrical, the positioning support is fixedly connected with the plurality of punching sheets and the positioning support, the inner sides of the punching sheets are provided with iron teeth, the positioning support is provided with positioning grooves, and the iron teeth are located in the positioning grooves. The punching sheet is divided into a top sheet, a first middle sheet, a second middle sheet and a bottom sheet, the first middle sheet abuts against the second middle sheet, the positioning support is provided with a first abutting ring, a second abutting ring, a third abutting ring and a fourth abutting ring which extend outwards, the first abutting ring is fixedly connected with the top sheet, the second abutting ring is fixedly connected with the first middle sheet, and the fourth abutting ring is fixedly connected with the second middle sheet. According to the utility model, the production efficiency is high, the quality of the produced stator core is low, and the performance of a finished motor is improved.

Description

Technical Field

[0001] The utility model relates to the field of motor accessories, and more particularly to a stator core. Background Art

[0002] The stator core is a crucial component of the stator and a key element of the motor's magnetic circuit. A typical stator core consists of segments, ventilation slots, positioning ribs, upper and lower tooth pressure plates, tension bolts, and a support plate. The stator core is punched from silicon steel sheets into segments and stacked on the positioning ribs. The positioning ribs are welded to the base ring plate via the support plate, and the core is held together by tension bolts via the upper and lower tooth pressure plates. The core also houses the windings. During generator operation, the core is subjected to a combination of mechanical, thermal, and electromagnetic forces.

[0003] The existing stator core has low production efficiency and heavy weight. Utility Model Content

[0004] In view of the deficiencies in the prior art, the present invention aims to provide a stator core with high production efficiency and light weight.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: the stator core includes a plurality of punching sheets and a positioning bracket, the positioning bracket is in a tube-type configuration, the positioning bracket is fixedly connected to the plurality of punching sheets and the positioning bracket, iron teeth are provided on the inner side of the punching sheets, the positioning bracket is provided with a positioning groove, the iron teeth are located in the positioning groove, the punching sheets are divided into a top sheet, a first middle sheet, a second middle sheet and a bottom sheet, the first middle sheet and the second middle sheet are in conflict with each other, the positioning bracket is provided with a first conflict ring, a second conflict ring, a third conflict ring and a fourth conflict ring extending outward, the first conflict ring is fixedly connected to the top sheet, the second conflict ring is fixedly connected to the first middle sheet, the third conflict ring is fixedly connected to the second middle sheet, and the fourth conflict ring is fixedly connected to the bottom sheet.

[0006] As a further improvement of the present invention, a first positioning hole is provided on the top sheet, a first positioning button is provided on the first contact ring, and the first positioning button is embedded in the first positioning hole; a fourth positioning hole is provided on the bottom sheet, a fourth positioning button is provided on the fourth contact ring, and the fourth positioning button is embedded in the fourth positioning hole.

[0007] As a further improvement of the present invention, a second positioning hole is provided on the first middle piece, a second positioning button is provided on the second contact ring, and the second positioning button is embedded in the second positioning hole; a third positioning hole is provided on the second middle piece, a third positioning button is provided on the third contact ring, and the third positioning button is embedded in the third positioning hole.

[0008] As a further improvement of the present invention, the second positioning hole and the third positioning hole are positioned correspondingly, and the second positioning button and the third positioning button are connected.

[0009] As a further improvement of the present invention, the first contact ring is provided with an inclined first ventilation groove, the second contact ring is provided with an inclined second ventilation groove, the third contact ring is provided with an inclined third ventilation groove, and the fourth contact ring is provided with an inclined fourth ventilation groove.

[0010] As a further improvement of the present invention, the iron teeth on the top sheet and the iron teeth on the bottom sheet are arranged facing each other, and the iron teeth on the first middle sheet and the second middle sheet are arranged facing away from each other.

[0011] As a further improvement of the present invention, the positioning bracket, the first interference ring, the second interference ring, the third interference ring and the fourth interference ring are integrally injection molded.

[0012] The beneficial effects of the utility model are high production efficiency, low quality of the produced stator core, and improved performance of the finished motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0014] Figure 2 A schematic diagram of the three-dimensional structure of the present invention from another perspective;

[0015] Figure 3 It is a partial cross-sectional structural schematic diagram of the utility model.

[0016] Marking instructions: 1. Punch; 11. Iron teeth; 2. Positioning bracket; 21. Positioning slot; 31. Top plate; 311. First positioning hole; 32. First middle plate; 321. Second positioning hole; 33. Second middle plate; 331. Third positioning hole; 34. Bottom plate; 341. Fourth positioning hole; 41. First interference ring; 411. First positioning button; 42. Second interference ring; 421. Second positioning button; 43. Third interference ring; 431. Third positioning button; 44. Fourth interference ring; 441. Fourth positioning button; 51. First ventilation slot; 52. Second ventilation slot; 53. Third ventilation slot; 54. Fourth ventilation slot. DETAILED DESCRIPTION

[0017] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0018] Reference Figure 1-Figure 3As shown, the stator core of this embodiment includes a plurality of punching sheets 1 and a positioning bracket 2. The positioning bracket 2 is in a tube-shaped form. The positioning bracket 2 is fixedly connected to the plurality of punching sheets 1 and the positioning bracket 2. An iron tooth 11 is provided on the inner side of the punching sheet 1. The positioning bracket 2 is provided with a positioning groove 21. The iron tooth 11 is located in the positioning groove 21. The punching sheet 1 is divided into a top sheet 31, a first middle sheet 32, a second middle sheet 33 and a bottom sheet 34. The first middle sheet 32 ​​and the second middle sheet 33 are in conflict with each other. The positioning bracket 2 is provided with a first contact ring 41, a second contact ring 42, a third contact ring 43 and a fourth contact ring 44 extending outward. The first contact ring 41 is fixedly connected to the top sheet 31, the second contact ring 42 is fixedly connected to the first middle sheet 32, the third contact ring 43 is fixedly connected to the second middle sheet 33, and the fourth contact ring 44 is fixedly connected to the bottom sheet 34.

[0019] Through the above technical solution, the iron teeth 11 are arranged perpendicularly to the punching sheet 1, and the iron teeth 11 of the top sheet 31, the first middle sheet 32, the second middle sheet 33 and the bottom sheet 34 are all located in the positioning groove 21. The first contact ring 41 is fixedly connected to one end face of the top sheet 31, one end face of the first middle sheet 32 ​​is fixedly connected to the second contact ring 42, and the other end face conflicts with the second middle sheet 33, the other end face of the second middle sheet 33 is fixedly connected to the third contact ring 43, and one end face of the bottom sheet 34 is fixedly connected to the fourth contact ring 44. During production, the materials (top sheet 31, the first middle sheet 32, the second middle sheet 33, and the top sheet 31) are loaded into the mold by a loading device, and then injection molding is performed to inject the positioning bracket 2, the first contact ring 41, the second contact ring 42, the third contact ring 43, and the fourth contact ring 44 into the mold at one time, and the top sheet 31, the first middle sheet 32, the second middle sheet 33 and the top sheet 31 are fixed to complete the processing of the stator core. There is no need for manual operation to tighten the bolts for assembly, which is highly efficient. In addition, the injection-molded positioning bracket 2, the first contact ring 41, the second contact ring 42, the third contact ring 43, and the fourth contact ring 44 have low density and light weight, so that the finished motor can be lightweight and the motor performance can be improved.

[0020] As an improved specific embodiment, a first positioning hole 311 is provided on the top plate 31, a first positioning button 411 is provided on the first contact ring 41, and the first positioning button 411 is embedded in the first positioning hole 311; a fourth positioning hole 341 is provided on the bottom plate 34, a fourth positioning button 441 is provided on the fourth contact ring 44, and the fourth positioning button 441 is embedded in the fourth positioning hole 341.

[0021] Through the above technical solution, the first positioning button 411 is inserted into the first positioning hole 311 to fix the top sheet 31, and the fourth positioning button 441 is inserted into the fourth positioning hole 341 to fix the bottom sheet 34. The top sheet 31 and the bottom sheet 34 are fixed from multiple angles, further improving the connection strength between the top sheet 31, the bottom sheet 34 and the positioning bracket 2, thereby improving stability during use.

[0022] As an improved specific embodiment, a second positioning hole 321 is provided on the first middle piece 32, and a second positioning button 421 is provided on the second contact ring 42, and the second positioning button 421 is embedded in the second positioning hole 321; a third positioning hole 331 is provided on the second middle piece 33, and a third positioning button 431 is provided on the third contact ring 43, and the third positioning button 431 is embedded in the third positioning hole 331.

[0023] Through the above technical solution, the second positioning button 421 is inserted into the second positioning hole 321 to fix the first middle piece 32, and the third positioning button 431 is inserted into the third positioning hole 331 to fix the second middle piece 33. The first middle piece 32 and the second middle piece 33 are fixed from multiple angles, further improving the connection strength between the first middle piece 32, the second middle piece 33 and the positioning bracket 2, thereby improving stability during use.

[0024] As an improved specific implementation, the second positioning hole 321 and the third positioning hole 331 are positioned correspondingly, and the second positioning button 421 and the third positioning button 431 are connected.

[0025] Through the above technical solution, the second positioning button 421 is connected to the third positioning button 431 to fix the second contact ring 42 and the third contact ring 43, so that the position of the first middle piece 32 and the second middle piece 33 in the same group is more stable, further improving the stability during use.

[0026] As an improved specific embodiment, the first contact ring 41 is provided with an inclined first ventilation groove 51, the second contact ring 42 is provided with an inclined second ventilation groove 52, the third contact ring 43 is provided with an inclined third ventilation groove 53, and the fourth contact ring 44 is provided with an inclined fourth ventilation groove 54.

[0027] Through the above technical solution, the first ventilation slot 51, the second ventilation slot 52, the third ventilation slot 53, and the fourth ventilation slot 54 are set to reduce the eddy current loss of the current, thereby reducing the temperature and energy consumption of the motor, improving the motor operation efficiency, and reducing the motor noise.

[0028] As an improved specific implementation, the iron teeth 11 on the top plate 31 and the iron teeth 11 on the bottom plate 34 are arranged to face each other, and the iron teeth 11 on the first middle plate 32 and the second middle plate 33 are arranged to face each other.

[0029] Through the above technical solution, specifically, the first middle pieces 32 and the second middle pieces 33 are provided in one or more groups. The first middle pieces 32 near the ends are interlaced with the iron teeth 11 on the top piece 31, the second middle pieces 33 near the ends are interlaced with the iron teeth 11 on the bottom piece 34, and the first middle pieces 32 in the middle are interlaced with the iron teeth 11 on the adjacent group of second middle pieces 33, which can significantly improve the structural strength of the stator core.

[0030] As an improved specific implementation, the positioning bracket 2, the first contact ring 41, the second contact ring 42, the third contact ring 43 and the fourth contact ring 44 are integrally injection molded.

[0031] Through the above technical solution, the positioning bracket 2, the first contact ring 41, the second contact ring 42, the third contact ring 43, and the fourth contact ring 44 are integrally injection-molded, and the structure has high strength.

[0032] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, certain improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A stator core comprising a plurality of punching sheets (1), characterized in that: The invention also includes a positioning bracket (2), the positioning bracket (2) is cylindrical, the positioning bracket (2) is fixedly connected to a plurality of punching sheets (1) and the positioning bracket (2), the inner side of the punching sheet (1) is provided with an iron tooth (11), the positioning bracket (2) is provided with a positioning groove (21), the iron tooth (11) is located in the positioning groove (21), the punching sheet (1) is divided into a top sheet (31), a first middle sheet (32), a second middle sheet (33) and a bottom sheet (34), the first middle sheet (32) and the second middle sheet (33) are connected to each other, and the bottom sheet (34) is fixed to each other. The two middle pieces (33) are in contact with each other. The positioning bracket (2) is provided with a first contact ring (41), a second contact ring (42), a third contact ring (43) and a fourth contact ring (44) extending outward. The first contact ring (41) is fixedly connected to the top piece (31), the second contact ring (42) is fixedly connected to the first middle piece (32), the third contact ring (43) is fixedly connected to the second middle piece (33), and the fourth contact ring (44) is fixedly connected to the bottom piece (34).

2. The stator core according to claim 1, characterized in that: The top sheet (31) is provided with a first positioning hole (311), the first contact ring (41) is provided with a first positioning button (411), and the first positioning button (411) is embedded in the first positioning hole (311); the bottom sheet (34) is provided with a fourth positioning hole (341), the fourth contact ring (44) is provided with a fourth positioning button (441), and the fourth positioning button (441) is embedded in the fourth positioning hole (341).

3. The stator core according to claim 1, wherein: The first middle piece (32) is provided with a second positioning hole (321), the second contact ring (42) is provided with a second positioning button (421), and the second positioning button (421) is embedded in the second positioning hole (321); the second middle piece (33) is provided with a third positioning hole (331), the third contact ring (43) is provided with a third positioning button (431), and the third positioning button (431) is embedded in the third positioning hole (331).

4. The stator core according to claim 3, characterized in that: The second positioning hole (321) and the third positioning hole (331) are located in corresponding positions, and the second positioning button (421) and the third positioning button (431) are connected.

5. The stator core according to claim 1, characterized in that: The first contact ring (41) is provided with an inclined first ventilation slot (51), the second contact ring (42) is provided with an inclined second ventilation slot (52), the third contact ring (43) is provided with an inclined third ventilation slot (53), and the fourth contact ring (44) is provided with an inclined fourth ventilation slot (54).

6. The stator core according to claim 1, characterized in that: The iron teeth (11) on the top plate (31) and the iron teeth (11) on the bottom plate (34) are arranged facing each other, and the iron teeth (11) on the first middle plate (32) and the second middle plate (33) are arranged facing each other.

7. The stator core according to claim 1, characterized in that: The positioning bracket (2), the first abutment ring (41), the second abutment ring (42), the third abutment ring (43) and the fourth abutment ring (44) are integrally injection-molded.

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