KR20050006567A - Core for electric motor and manufacturing method thereof - Google Patents

Abstract

PURPOSE: A motor core and a manufacturing method thereof are provided to reduce a manufacturing time and to prevent a scrap from occurring by reducing a number of operations required for the manufacturing method. CONSTITUTION: A motor core includes a core steel plate(11) having a stripe type strip portion(12) and a plurality of teeth portions(13). The stripe type strip portion has a length longer than a width thereof. The teeth portions are exposed on one portion of the strip portion in a width direction and are formed to be spaced from one another with a predetermined pitch in a length direction. The core steel plate is laminated in a spiral shape. The strip portion is laminated to form a predetermined diameter such that the teeth portion is exposed outwards along with a radius direction.

Description

CORE FOR ELECTRIC MOTOR AND MANUFACTURING METHOD THEREOF

The present invention relates to a motor core and a method for manufacturing the same, and more particularly, to a motor core and a method for manufacturing the same, which can suppress the occurrence of scrap to reduce material loss and facilitate manufacturing. .

In general, a motor includes a stator that is fixedly arranged and a rotor (slider) that is disposed so as to be able to move relative to the stator. Rotary motors may be classified into an inner rotor type and an outer rotor type according to the arrangement of the stator and the rotor. The stator and rotor typically have a stator core and / or rotor core formed by stacking a plurality of electrical steel sheets, and the stator core and / or rotor core are provided with a coil or a magnet.

1 is a perspective view of a conventional core for a motor, FIG. 2 is a perspective view of the segment stack of FIG. 1, and FIG. 3 is a view showing a punched state of the segment of FIG. 1. As shown in these figures, the core for the motor has a plurality of teeth portions 112b formed to protrude outward in the radial direction and are integrally coupled to each other in a circumferential direction to be butt-contacted with each other to form a disk shape. A plurality of segment stacks 110 are formed. Each segment stack 110 is formed by stacking a plurality of segments 111 in the thickness direction, each segment 111 is a radius on the outer surface of the body 112a and each body 112a coupled to each other along the circumferential direction And a plurality of tooth portions 112b protruding along the direction and spaced apart at a predetermined pitch along the circumferential direction.

Protruding portion 116 is formed at one end of the body 112a along the circumferential direction, and at the other end, the protruding groove 117 to accommodate the protrusion 116 formed at the other segment stack 110. It is recessed. Mounts 113 are formed inside the body 112a to be coupled to a fixture (not shown), and through holes 115 are formed in each mount 113 through a plate surface. Uneven portions 118 are formed in each of the tooth portions 112b and the body 112a so as to be fitted to each other along the thickness direction when stacked, and the guide holes 119 used for the stacked portions between the uneven portions 118. ) Is penetrating.

On the other hand, each segment 111, as shown in Figure 3, punch (not shown) so that the mounting portion 113 is disposed adjacent to each other on the base metal steel plate 121 disposed on the die (not shown) It is formed by placing and blanking. Each punched segment 111 is stacked in layers to form a segment stack 110, and each segment stack 110 is a projection of the segment stack 110 in which the protrusions 116 are adjacently disposed along the circumferential direction. After being coupled to be inserted into the receiving groove 117 is fixed integrally by welding or the like.

By the way, in the conventional core for a motor, after forming the segment 111 divided into the plurality along the circumferential direction, and laminating | stacking the punched segment 111 in layers, after forming the segment laminated body 110, They are joined to each other along the circumferential direction and are welded to fix the mutually coupled regions of the protrusion 116 and the protrusion receiving groove 117, which makes the production process such as punching, lamination, assembly and welding complicated and time consuming. 3, the scrap 123 is generated in a large amount, so that the loss of the base metal steel plate 121 is large.

Accordingly, it is an object of the present invention to provide a motor core and a method of manufacturing the same, which can suppress the occurrence of scrap to reduce the loss of material and facilitate the manufacture.

1 is a perspective view of a conventional motor core,

2 is a perspective view of the segment stack of FIG.

3 is a view showing a punching state of the segment of FIG.

4 is a perspective view of a core for a motor according to an embodiment of the present invention;

5 is a plan view of FIG. 4;

6 is a view showing a punching state of the core steel sheet of FIG.

7 is a view for explaining the lamination of the punched core steel sheet of FIG.

8 is a side cross-sectional view of FIG. 7.

Explanation of symbols on the main parts of the drawings

11 core steel 12 strip part

13: Teeth part 15: base material electrical steel sheet

16: scrap

The object is, according to the present invention, a strip-shaped strip portion having a longer length than the width, a plurality of teeth protruding in the width direction on one side edge of the strip portion and spaced apart from each other at a predetermined pitch along the longitudinal direction A core for a motor is formed by spirally stacking a core steel sheet having a portion.

Here, the strip portion is preferably laminated so as to form an inner diameter of a predetermined diameter so that the tooth portion protrudes outward in the radial direction.

On the other hand, according to another field of the present invention, a strip-shaped strip having a longer length than the width, and a plurality of teeth projecting in the width direction on one side edge of the strip portion and spaced at a predetermined pitch along the length direction Forming a core steel sheet; There is provided a method for manufacturing a core for a motor, comprising the step of spirally stacking the core steel sheet so that the strip portion and the tooth portion are arranged in a layered manner.

Here, it is preferable to further include providing an inner diameter guide for guiding the lamination before the step of laminating the core steel sheet to form an inner diameter of a predetermined size.

Hereinafter, with reference to the accompanying drawings will be described in detail the present invention.

4 is a perspective view of a core for a motor according to an embodiment of the present invention, FIG. 5 is a plan view of FIG. 4, FIG. 6 is a view showing a punched state of the core steel sheet of FIG. 5, and FIG. 7 is of FIG. 6. 8 is a view for explaining the lamination of the punched core steel sheet, and FIG. As shown in these figures, the core for the motor has a strip-shaped strip portion 12 having a longer length than the width and one edge of the strip portion 12 protruding along the width direction and predetermined along the length direction. The core steel sheet 11 having a plurality of tooth portions 13 spaced apart at a pitch of is formed by spirally stacking. Here, the tooth portion 13 can be appropriately adjusted in size, shape and pitch according to the use of the stator core or the rotor core and the winding method of the coil.

As shown in FIG. 6, the core steel plate 11 is disposed side by side with the strip portions 12 spaced apart from each other along the width direction on a base electrical steel sheet 15 disposed on a die (not shown). The tooth parts 13 are disposed between different tooth parts 13 to arrange punches (not shown) such that the tooth parts 13 of the core steel plates 11 are alternately arranged along the longitudinal direction. It can be seen that the scrap 16 is generated significantly less than conventionally formed by punching out.

When the core steel plate 11 is punched out, one end of the strip portion 12 is disposed around the rod-shaped inner diameter guide 17 having a predetermined diameter so that the tooth portions 13 face outward, and the inner diameter guide 17 When the core steel sheet 11 is pressurized to be plastically deformed along the circumferential direction and wound in any one direction, each tooth portion 13 is radially disposed with respect to the strip portion 12 that is opened outward and forms a circle. Subsequently, when the core steel sheet 11 is wound to be plastically deformed and wound in the same direction spirally along the circumferential direction of the inner diameter guide 17, the strip portion 12 and the tooth portion 13 are shown in FIGS. 7 and 8. As is arranged in layers.

When the lamination of the core steel plate 11 is completed, the inner diameter guide 17 is separated, and welding or riveting is performed to prevent the strip portions 12 and the tooth portions 13 stacked on each other from being spaced apart from each other in the thickness direction. Or by using separate injection moldings.

In this case, the strip part 12 and / or the tooth part 13 may be formed with an uneven part (not shown) to be fitted to each other in the thickness direction during lamination.

As described above, according to the present invention, there is provided a strip-shaped strip portion having a longer length than the width and a plurality of teeth portions protruding in the width direction at one side edge of the strip portion and spaced apart at a predetermined pitch along the length direction. By stacking one core steel plate spirally, it is easy to manufacture because it can reduce the number of processes unlike the conventional method of forming / segmenting a segment laminate by circumferentially dividing segments and assembling each segment laminate. The present invention provides a motor rotor and a method of manufacturing the same, which can shorten the production time and significantly reduce the generation of scrap, thereby reducing the loss of materials.

Claims (4)

Spirally laminating a core steel sheet having a strip-shaped strip portion having a length longer than the width, and a plurality of teeth portions projecting in a width direction at one edge of the strip portion and spaced apart from each other at a predetermined pitch along the length direction. A motor core, characterized in that formed by. The method of claim 1, And the strip portion is laminated to form an inner diameter of a predetermined diameter such that the tooth portion protrudes outward in a radial direction. Forming a core steel sheet including a strip-shaped strip portion having a length longer than the width, and a plurality of teeth portions projecting in a width direction at one edge of the strip portion and spaced at a predetermined pitch along a length direction; And spirally stacking the core steel sheet so that the strip portion and the tooth portion are arranged in a layered manner. The method of claim 3, And providing an inner diameter guide for guiding the lamination so that the strip part can form an inner diameter of a predetermined size before the laminating of the core steel sheet.