Laminated riveting structure of circumferential large-torque skewed slot iron core and manufacturing process of iron core

Abstract

The invention discloses a laminated riveting structure of a circumferential large-torque skewed slot iron core and a manufacturing process of the iron core. The laminated riveting structure comprises a plurality of buckling point sheets which are laminated to form a skewed slot, wherein each buckling point sheet is provided with long buckling points and short buckling points which are alternately arranged along the same circumference, each long buckling point and each short buckling point respectively comprise a through hole and an outer convex part which are connected with each other, the outer convex parts of the long buckling points and the short buckling points are arc-shaped, and the outer convex parts of the long buckling points are longer than the outer convex parts of the short buckling points and shorter than the overall length of the short buckling points; and in two arbitrary vertically adjacent buckle point sheets, the long buckle point of the upper buckle point sheet is buckled with the short buckle point of the lower buckle point sheet, and the ends, away from the corresponding through hole, of the two ends of the outward protruding parts of the two buckle points are vertically aligned in the vertical direction. The maximum torque capable of being borne by the laminated riveting structure of the skewed slot iron core in the circumferential direction exceeds 80 N, the laminated riveting structure can be applied to motor products with the large torque requirement, the technology can be used for manufacturing the skewed slot iron core with the large torque, and the manufacturing process is simple and easy to implement.

Description

technical field [0001] The invention relates to the technical field of motor iron cores, in particular to a stacked riveting structure of a circumferential large-torque chute iron core and a manufacturing process of the iron core. Background technique [0002] The winding groove of the motor core has two structures: straight groove type and inclined groove type. For the stator core, its cogging torque is one of the key factors that must be considered in the design and manufacture of the servo motor, and it is also the one that affects the positioning accuracy of the servo motor. One of the culprits is that in order to suppress the cogging torque, the winding slot of the stator core is generally made into a chute, so that the stator pole pieces are misaligned up and down. During the manufacture of this kind of iron core, since the upper and lower adjacent buckle pieces need to produce a certain angle difference when stacked, the setting of the buckle point is particularly imp...

AI Technical Summary

Problems solved by technology

When this kind of iron core is manufactured, since the upper and lower adjacent buckle pieces need to produce a certain angle difference when stacked, the setting of the buckle point is particularly important. At present, the shape of the buckle point is generally set as a long strip. The conventional For the single-piece buckle point sheet used to manufacture the chute core, please refer to figure 1 , the buckle point M is composed of a through hole and a non-through groove, so that the buckle points of the upper buckle piece can be combined with the buckle points of the lower buckle piece to form a figure 2 For the chute core shown, the cross-sectional view at the buckle point of the chute core can be referred to image 3 , because there is a certain angle difference between two adjacent buckle points, after the adjacent buckle points are combined, the ends of the two buckle points are not completely fitted, and there is a small gap S between them. This iron The maximum torque that the core can withstand in the circumferential direction is between 10N-13N. Products exceeding the maximum torque will be deformed due to gap compression. It is only suitable for motor products with low torque bearing requirements.

For some products that require greater torsional force, the maximum torque of the conventional stacked riveting structure is far from enough. Therefore, it is urgent to develop a new stacked riveting structure of the circumferential large-torque chute core and to manufacture the Iron core technology, so as to manufacture the high-torque chute iron core required by motor products

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