JPH05344665A - Stator for motor - Google Patents

Abstract

PURPOSE:To obtain a stator for a motor in which winding of a stator winding is facilitated and shaping after winding and electric insulation are simple by separating a yoke of the stator and a toothed part to a connectible state, and coupling adjacent two toothed sheets inside. CONSTITUTION:Adjacent two toothed core sheets 3 are radially disposed, coupled inside to form a circular-arclike coupling sheet 4, and a coupling pawl 5 to be coupled with the yoke 5 is formed outside the sheet 3. One or a plurality of layers of the sheets 4 each having a disposition (b) in which one or a plurality of sheet 4s each having a disposition (a) are superposed and circumferentially displaced by one slot are superposed, engaged with a half punched groove 7 to be integrated. Thus, the adjacent two toothed parts are coupled to form a coupled toothed sheet thereby to simplify an electric insulation and winding of a stator winding, to reduce its cost and to improve operability.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stator of an electric motor, more specifically, a yoke portion and a tooth portion are formed separately from each other, and a stator winding is integrally joined after winding. The present invention relates to a stator of an electric motor.

[0002]

2. Description of the Related Art Conventionally, in a stator of an electric motor, a core sheet in which a yoke portion and a tooth portion are integrally punched is laminated, and a magnet wire is inserted through an opening of an inner slot groove, and the tooth portion is electrically insulated. It is wound so as to form a stator. In this case, the work of electrically insulating the teeth and the step of inserting the magnet wire from the groove opening become complicated, and the shaping and processing after winding are troublesome, resulting in a decrease in workability. . As a countermeasure against this, the core sheet of the stator is separated into the yoke portion and the tooth portion in a state in which they can be joined, and they are laminated in separate states, and after winding the winding around the tooth portion, they are joined to form a stator. However, when the number of poles of the stator is large, the laminated state of the teeth becomes disjointed, making it difficult to join with the yoke part, and the spacing between the teeth varies, and There are problems such as reduced efficiency.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and provides a stator for an electric motor in which the lamination of the teeth is ensured and the intervals between the teeth are uniform. The purpose is to.

[0004]

In order to achieve the above-mentioned object, two adjacent tooth portions of separated tooth portions of a stator are integrally connected inside to form a connecting tooth sheet, and a plurality of identical tooth portions are formed. One or more layers of connecting tooth sheets are radially arranged at a predetermined interval, and one or more layers of connecting tooth sheets are stacked in a state of being shifted by one slot in the circumferential direction, and the same is shifted by one slot. In this state, the layers are repeatedly laminated to a predetermined stack thickness and integrally laminated, and the stator winding is wound from the outside and then integrally joined to the yoke portion.

[0005]

According to the above construction, two adjacent tooth portions are radially arranged at a predetermined interval and are connected inside to form a connecting tooth sheet, and the connecting tooth sheet is set to the number of magnetic poles. Arrange a plurality of matching sheets in a radial pattern by stacking one or more layers,
One or a plurality of connecting tooth sheets are superposed on one another in the state of being shifted by one slot in the circumferential direction, and thereafter, the sheets of the tooth portions are separated by stacking to a predetermined stacking thickness in the same manner by shifting one sheet for each slot. Further, by overlapping the half-blanked grooves provided in the tooth sheet, it is possible to ensure the lamination of the tooth portions and to make the intervals between the tooth portions uniform.

[0006]

Embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a plan view showing a core sheet structure of a stator core 1 of the present invention. FIGS. 1 (a) and 1 (b) are tooth part sheets 3 forming tooth parts 2 and two adjacent tooth part core sheets 3
Are arranged radially and are connected on the inner side to form an arc-shaped connecting tooth sheet 4, and on the outer side of the tooth sheet 3, connecting claws 6 that are connected to the yoke portion 5 are formed. One layer of the tooth portion 2 is formed by radially arranging a plurality of connected tooth portion sheets 4 which are connected to the number of magnetic poles so as to face the outer circumference of the rotor.
(B) is arranged so as to be shifted in the circumferential direction by one slot with respect to (a). Further, in the center of the tooth sheet 3, a half punching groove 7 having a V-shaped tip protruding downward by half punching is formed. The shift of the tooth portion 3 is prevented. (C) is a core sheet of the yoke portion 5, and a plurality of engaging grooves 8 are formed inside the ring-shaped core sheet at symmetrical positions according to the number of the tooth portions 2 and are laminated and integrated. The engaging claws 6 of the part 2 are fitted into the engaging grooves 8 and the tooth part 2
The tip end is fixed so as to face the axial center, and the adjacent tooth portion 2 and yoke portion 5 form a slot groove.

FIG. 2 shows a state in which the connecting tooth portion sheet 4 and the yoke portion 5 are laminated, and one or a plurality of connecting tooth portion core sheets 4 arranged in (a) are placed on top of each other (b). The tooth core sheet 4 is laminated by one layer or a plurality of layers, this operation is repeated up to a predetermined stacking thickness, and the half punching grooves 7 are fitted and laminated to be integrated. Except for the claw 6 and the inner diameter part, electrical insulation processing is performed integrally,
By winding the stator winding 9 around each tooth 2 as shown in FIG. 3 and inserting and fixing it inside the yoke 5 as shown in FIG. 4,
The stator core 1 is formed.

[0008]

As described above, the stator core is divided into the yoke portion and the tooth portion so that they can be joined, and the adjacent two
In the state that one tooth or more layers are arranged radially according to the number of magnetic poles by connecting one tooth part inside and forming a connecting tooth sheet, and shifting one slot in the circumferential direction on it. By stacking one layer or a plurality of layers, similarly repeatedly stacking and stacking up to a predetermined stacking thickness to be integrated, and winding the stator winding around each tooth part, and then combining with the stacked yoke part,
It is possible to simplify the electric insulation process, the winding work of the stator winding, and the shaping and processing after the winding, so that the cost can be reduced and the workability can be improved.

[Brief description of drawings]

FIG. 1 is a plan view showing a structure of a stator core of the present invention.

FIG. 2 is a plan view and a side sectional view showing a laminated state of a stator core.

FIG. 3 is a plan view of a tooth portion in which a stator winding is applied to the laminated tooth portion.

FIG. 4 is a plan view of a stator core provided with a stator winding.

[Explanation of symbols]

 1 Stator core 2 Teeth 3 Teeth core sheet 4 Connecting tooth sheet 5 Yoke part 6 Coupling claw 7 Half punching groove 8 Coupling groove 9 Stator winding

Front page continued (72) Inventor Shigeru Mori 1116 Suenaga, Takatsu-ku, Kawasaki-shi, Fujitsu General Limited (72) Inventor Yuji Kawai 1116 Suenaga, Takatsu-ku, Kawasaki-shi (72) Inventor, Fujitsu Koji Mori 1116 Suenaga, Takatsu-ku, Kawasaki City Inside Fujitsu General Limited

Claims (2)

[Claims] 1. A stator for an electric motor, wherein a stator yoke portion and a tooth portion are laminated and formed in a separated state, and a stator winding is wound around the tooth portion from the outside and joined to the yoke portion. , Two adjacent tooth portions of the separated tooth portions of the stator are integrally connected inside to form a connecting tooth sheet, and a plurality of the same connecting tooth sheets are radially arranged at a predetermined interval in one layer or a plurality of layers. Layers are arranged, and one or more layers of the connecting tooth sheet are stacked on top of each other with one slot shifted in the circumferential direction, and thereafter, similarly, they are repeatedly stacked with a one slot shift to a predetermined stacking thickness and integrally laminated. A stator of an electric motor, characterized in that the stator winding is wound from the outside and then integrally joined to the yoke portion. 2. The electric motor according to claim 1, wherein a half-drain groove extending in a central direction is formed in a tooth portion of the stator, and the half-drain grooves are stacked and laminated at the time of stacking. Stator.