JP2000156956A - Armature core and lamination method for armature core - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a small motor by forming a small armature core. SOLUTION: In this lamination method, sheet-like cores are laminated, and an armature core is formed. Holding parts 2 which are fixed to a shaft are formed, and recessed parts (or protruding parts) 7 for lamination, are formed on the inner circumference or the outer circumference of the holding parts 2. Protruding parts (or recessed parts) in the sheet-like cores to be laminated are fitted to the recessed parts (or the protruding parts) 7. Thereby, the armature core is formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an armature for winding a coil, which is formed by laminating plate-shaped cores, and a method for laminating the same.

[0002]

2. Description of the Related Art Conventionally, as a method of laminating and forming an amateur core such as a DC motor, there is a method of positioning and laminating a plate-shaped core by embossing or the like as shown in FIG. In FIG. 3, 1 is a plate-shaped core, 2 is a holding portion having a central through hole, and 3 is a pole provided radially from the holding portion 2 and a core pole 4 is provided on the free end side. Reference numeral 5 denotes an emboss provided at an arbitrary position on the pole 3. However, in the method of providing the embossment 5 at an arbitrary position on the pole 3 as described above, the width of the pole 3 needs to be at least the width of the diameter of the embossment 5 + α. In addition, a method in which the embossing 5 is provided on the holding portion 2 has also been proposed, but in this method, the diameter of the holding portion 2 is equal to the diameter of the through hole penetrating through the central shaft (= shaft diameter) + the diameter of the embossing 5 + α. Will be needed. For this reason, it was difficult to reduce the size of the amateur core 1. Therefore, it has been an obstacle to downsizing the motor.

[0003]

As described above, when the conventional amateur core 1 is laminated, the pole 3 or the holding portion 2 is required.
The method of providing the emboss 5 on the motor has been an obstacle to downsizing the motor.

SUMMARY OF THE INVENTION An object of the present invention is to provide an armature core capable of minimizing an increase in the diameter of a motor and enabling an armature core of a very small motor to be easily laminated, and a method of laminating the same. is there.

[0005]

In order to solve the above-mentioned problems, according to the first aspect of the present invention, an amateur core is formed by laminating a plate-like core having a holding portion for fixing the shaft to the shaft in the center. This can be achieved by forming a concave portion (convex portion) for lamination on the inner periphery or outer periphery of the holding portion. According to the second aspect of the present invention, an amateur core is formed by laminating plate-shaped cores. A holding portion for fixing to a shaft and a concave portion (convex portion) for lamination are provided on the inner or outer periphery of the holding portion. It can be achieved by forming and fitting a convex portion (concave portion) of a plate-shaped core to be laminated on the concave portion (convex portion).

[0006]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is an exploded perspective view of a main part for describing a first embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a plate-shaped amateur core, and 2 denotes a holding portion, through which a shaft (not shown) passes through a through hole 6 to hold the plate-shaped amateur core 1. Reference numerals 3 denote poles provided radially from the holding portion, each having a core magnetic pole (not shown) on the free end side. In this embodiment, an example is shown in which three core magnetic poles are provided at 120-degree intervals, but four core magnetic poles may be provided at 90-degree intervals, or six core magnetic poles may be provided at 60-degree intervals. Of course, it may be provided. Reference numeral 7 denotes a concave portion for lamination provided at an arbitrary position on the inner peripheral side of the holding portion 2. In this embodiment, an example in which three concave portions (convex portions) 7 are provided is shown.
Any number is acceptable as long as there is at least one. One surface of the concave portion (convex portion) 7 becomes a concave portion (convex portion), and the opposite surface becomes a convex portion (concave portion), and the convex portion (concave portion) fits into the concave portion (convex portion) 7. Is positioned.

Therefore, a shaft (not shown) penetrates through the through-hole 6, and the plate-like cores 1 are laminated while aligning the positions of the concave portions (convex portions) 7, whereby a set of amateur cores can be formed. As described above, in this embodiment, since the concave portion (convex portion) 7 for lamination is provided on the inner peripheral side of the holding portion 2, the diameter of the holding portion 2 can be configured without increasing.

Next, FIG. 2 is an exploded perspective view of a main part for describing a second embodiment of the present invention. In FIG. 2, reference numeral 8 denotes a concave portion (convex portion) for lamination provided at an arbitrary position on the outer peripheral side of the holding portion 2. In this embodiment, an example in which three concave portions (convex portions) 8 are provided is shown, but any number may be used as long as the number is one or more. One surface of the concave portion (convex portion) 8 is a concave portion (convex portion), and the opposite surface is a convex portion (concave portion). Then, the convex portion (concave portion) is fitted into the concave portion (convex portion) 8 and positioned.

Accordingly, an armature (not shown) penetrates through the through-hole 6, and the plate-shaped armature cores 1 are laminated while aligning the positions of the recesses (projections) 8, whereby an armature core can be formed.

[0010]

According to the present invention, an armature core is formed by laminating a plate-like core having a holding portion for fixing the shaft to the shaft at the center thereof. (A convex portion), and a small-sized amateur core can be formed by forming an amateur core by fitting a convex portion (a concave portion) of a plate-shaped core laminated on the concave portion (a convex portion). Motor can be provided.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a main part for describing a first embodiment of the present invention.

FIG. 2 is an exploded perspective view of a main part for describing a second embodiment of the present invention.

FIG. 3 is a view for explaining a method of laminating and forming a conventional amateur core.

[Explanation of Signs] 1 Amateur core 2 Holder 3 Pole 4 Core pole 5 Emboss 6 Through hole 7 Concave (convex) 8 Concave (convex) 9 Shaft

Claims (2)

[Claims] 1. An armature core formed by laminating plate-shaped cores having a holding portion for fixing to a shaft at the center, wherein a concave portion (convex portion) for lamination is provided on an inner or outer periphery of the holding portion. An amateur core characterized by forming a. 2. An apparatus for forming an amateur core by laminating plate-shaped cores, wherein a holding portion for fixing to the shaft and a concave portion (convex portion) for lamination are formed on the inner or outer periphery of the holding portion. An armature core laminating method in which an armature core is formed by fitting a protrusion (recess) of a plate-shaped core to be stacked into the recess (convex portion).