CN-224218172-U - Structure for improving full rate of stator groove

CN224218172UCN 224218172 UCN224218172 UCN 224218172UCN-224218172-U

Abstract

The utility model relates to the technical field of brushless motors, in particular to a structure for improving the slot filling rate of a stator, wherein the wall thickness of an insulation framework can reach 0.2mm, compared with the prior insulation framework, the wall thickness is obviously reduced, the effective slot area is increased, the slot filling rate is increased, an upper yoke insulation framework and a lower yoke insulation framework are fixed on the insulation framework through a positioning assembly, the assembly reliability is further ensured, the structure comprises a stator iron core and the insulation framework, the stator iron core is arranged on the inner side wall of the insulation framework, the structure further comprises a positioning assembly, the upper yoke insulation framework and the lower yoke insulation framework, the upper yoke insulation framework is arranged on the upper part of the insulation framework, the lower yoke insulation framework is arranged on the lower part of the insulation framework, the stator iron core is arranged on the insulation framework through plastic-coating injection molding, and the positioning assembly is arranged on the upper yoke insulation framework and the lower yoke insulation framework and used for reinforcing connection among the insulation framework, the upper yoke insulation framework and the lower yoke insulation framework.

Inventors

YU ZHONGYOU
Zhang shengda
LIU QILONG
LIU QIAN
PAN XIAOYONG

Assignees

宁波拓普集团股份有限公司

Dates

Publication Date: 20260508
Application Date: 20250509

Claims (4)

1. The structure for improving the full rate of the stator slots comprises a stator core (1) and an insulation framework (2), wherein the stator core (1) is arranged on the inner side wall of the insulation framework (2), and the structure is characterized by further comprising a positioning assembly, an upper yoke insulation framework (3) and a lower yoke insulation framework (4), wherein the upper yoke insulation framework (3) is arranged on the upper portion of the insulation framework (2), the lower yoke insulation framework (4) is arranged on the lower portion of the insulation framework (2), the stator core (1) is arranged on the insulation framework (2) in a plastic-covered injection mode, and the positioning assembly is arranged on the upper yoke insulation framework (3) and the lower yoke insulation framework (4) and is used for reinforcing connection among the insulation framework (2), the upper yoke insulation framework (3) and the lower yoke insulation framework (4).
2. A structure for improving the slot filling rate of a stator as claimed in claim 1, wherein the positioning assembly comprises a plurality of groups of connecting pieces (5), the plurality of groups of connecting pieces (5) are respectively arranged on the outer side walls of the upper yoke insulating frame (3) and the lower yoke insulating frame (4), and annular bosses are respectively arranged on the upper yoke insulating frame (3) and the lower yoke insulating frame (4).
3. A structure for improving the filling rate of stator slots according to claim 2, further comprising a plurality of groups of bosses (6) and a plurality of groups of grooves (7), wherein the plurality of groups of bosses (6) are respectively arranged on the outer side walls of the annular bosses of the upper yoke insulating frame (3) and the lower yoke insulating frame (4), and the plurality of groups of grooves (7) are respectively arranged on the upper side and the lower side of the insulating frame (2).
4. A structure for improving the filling rate of stator slots according to claim 3, characterized in that the outer side walls of the plurality of groups of bosses (6) are provided with ribs.

Description

Structure for improving full rate of stator groove Technical Field The utility model relates to the technical field of brushless motors, in particular to a structure for improving the slot filling rate of a stator. Background The torque density and the power density of the brushless motor can be obviously improved by increasing the full rate of the stator slots of the brushless motor, so that the boundary size of the brushless motor is reduced, and the brushless motor is miniaturized and integrated. The purpose of promoting brushless motor stator slot filling rate is in order to increase the winding quantity, winds more enameled wires on the motor stator tooth of same boundary size to promote motor power under limited size, there are two major directions, on the one hand optimize the winding displacement, on the other hand increase effective slot area. At present, two main product structures are adopted, namely, the insulating framework of the stator is firstly subjected to injection molding and then assembled with the stator core, at the moment, in order to ensure the assemblability, the stator framework is divided into an upper part and a lower part, and the upper part and the lower part are installed in an opposite insertion mode, but the defect of the method is that a certain gap is required to be kept between the insulating framework and the stator core, and meanwhile, certain warping still exists after the assembly is finished, so that the groove filling rate is reduced. A layer of plastic is directly injected on the surface of a stator core in an integral plastic coating mode, the method can ensure that the framework and the core are gapless, but because the insulating layer in the framework groove is thinner, the circumference direction of the yoke part is thicker, and the plastic is thicker, the phenomena of shortage of materials, insufficient filling and the like are easily generated due to inconsistent shrinkage of the thin and thick plastic in injection molding, the thinner design structure of the insulating layer is limited, and the current general design wall thickness is 0.6mm. Disclosure of utility model In order to solve the technical problems, the utility model provides a structure which has the advantages that the wall thickness of an insulating framework can reach 0.2mm, compared with the wall thickness of the existing insulating framework which is 0.6mm, the wall thickness is obviously reduced, the effective groove area is increased, the groove filling rate is increased, the upper yoke insulating framework and the lower yoke insulating framework are fixed on the insulating framework in an assembly mode of a positioning assembly, and the assembly reliability is further ensured to improve the stator groove filling rate. The structure for improving the slot filling rate of the stator comprises a stator iron core and an insulation framework, wherein the stator iron core is arranged on the inner side wall of the insulation framework, the structure further comprises a positioning assembly, an upper yoke insulation framework and a lower yoke insulation framework, the upper yoke insulation framework is arranged on the upper portion of the insulation framework, the lower yoke insulation framework is arranged on the lower portion of the insulation framework, the stator iron core is arranged on the insulation framework in a plastic-covered injection molding mode, the positioning assembly is arranged on the upper yoke insulation framework and the lower yoke insulation framework and used for reinforcing connection among the insulation framework, the upper yoke insulation framework and the lower yoke insulation framework, and because the stator iron core and the insulation framework do not have thicker parts of the upper yoke insulation framework and the lower yoke insulation framework, the wall thickness of the insulation framework can reach 0.2mm after the stator iron core and the insulation framework are molded, compared with the existing 0.6mm, the effective slot area is obviously reduced, the slot filling rate is increased, and the upper yoke insulation framework and the lower yoke insulation framework are fixed on the insulation framework in an assembly mode through the positioning assembly mode, so that the reliability of assembly is further ensured. Preferably, the positioning assembly comprises a plurality of groups of connecting pieces, wherein the plurality of groups of connecting pieces are respectively arranged on the outer side walls of the upper yoke insulation framework and the lower yoke insulation framework, annular bosses are respectively arranged on the upper yoke insulation framework and the lower yoke insulation framework, and after the upper yoke insulation framework and the lower yoke insulation framework are arranged on the upper side and the lower side of the insulation framework, the annular bosses on the upper yoke insulation framework and the lower yoke insulation framewo