A stacked riveting structure of a circumferential high-torque oblique groove iron core and a manufacturing process of the iron core

Abstract

The invention discloses a stacked riveting structure of a circumferential large-torque chute iron core and a manufacturing process of the iron core. The stacked riveting structure includes a plurality of buckle points stacked to form a chute, and each buckle point is arranged along the same circumference. There are long buckle points and short buckle points arranged alternately. Both the long buckle points and the short buckle points include through holes and convex parts that meet each other. The convex parts of the long buckle points and short buckle points are arc-shaped. The long buckle points The convex part of the point is longer than the convex part of the short buckle point and shorter than the overall length of the short buckle point; in any two adjacent buckle pieces up and down, the long buckle point of the upper buckle piece and the lower buckle piece The short buckle points of the two buckle points are buckled together, and the ends of the two ends of the respective convex parts of the two buckle points are aligned up and down in the vertical direction at the end far away from the through hole. The stacked riveting structure of the chute iron core of the present invention can withstand a maximum torque of more than 80N in the circumferential direction, which can be applied to motor products requiring large torque. The process of the present invention can be used to manufacture chute iron cores with high torque, and the manufacturing process is simple and easy. .

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 high-torque oblique groove iron core and a manufacturing process of the iron core. Background technique [0002] The winding slot of the motor iron core has two structures: straight slot type and inclined slot type. For the stator iron core, the cogging torque is one of the key factors that must be considered in the design and manufacture of the servo motor, and it also 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 an oblique slot type, so that the stator pole shoes are dislocated up and down. During the manufacture of this kind of iron core, since the upper and lower adjacent buckle point pieces need to produce a certain angle difference when they are stacked, the setting of the buckle po...

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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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