JPH07163076A - Stator of motor - Google Patents

Abstract

PURPOSE:To provide a stator of a motor which has realized high speed winding of a coil and eliminated a wedge after insertion of the coil. CONSTITUTION:The reference numeral 10 designates a stator where a laminated ring type yoke 11 and a plurality of recessed areas 12 are provided at the internal circumference of the yoke 11, moreover an iron core 15 radially providing a plurality of teeth 14 portions having the projected portions 13 to be engaged with the recessed areas 12 is laminated, the laminated iron core 15 is integrally molded with a resin 16 and trapezoidal slots 17 are also provided between the teeth portions 14 of the iron core 15. Moreover, a coil wound around a cylindrical bobbin is provided astride the respective slots 17 and two teeth portions 14. For example, a coil is provided (not illustrated) astride two teeth portions 14 between the slots A and D of the slots 17. The recessed area 12 provided in the yoke 11 is engaged with the projected portion 13 of the teeth 14 loaded with the coil.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor stator.

[0002]

2. Description of the Related Art A conventional stator of a motor will be described below with reference to the drawings. FIG. 6 is a perspective view of a conventional motor stator. In FIG. 6, reference numeral 1 denotes a motor stator, which includes a yoke portion 2, a slot portion 3, a tooth portion 4, and an iron core 5 at an inner peripheral portion. 6 is a resin,
While the iron core 5 of the inner peripheral portion is integrally molded with the resin 6,
A pin support 7 is provided on the inner peripheral side of the stator 1. 8
Is a coil, which is integrally molded and has the coil 8 wound around the iron core 5 and fixed to the tooth portion 4. The outer periphery of the slot portion 3 has an insulating paper 9 for insulating between the yoke portion 2 and the coil 8.
Has been inserted. The end line of the wound coil 8 is connected to the pin support 7 and also connected to the power supply circuit from the pin support 7. Further, two or more pairs of coils 8 are provided on the iron core 5 at the inner peripheral portion symmetrically with 180 ° to generate a rotating magnetic field to rotate the motor.

[0003]

In such a conventional structure as described above, since the coil is directly wound around the slot portion 3, a plurality of grooves for each pole and for each phase can be provided to increase the coil pitch. However, since the coil 8 to be wound sticks out to the inner diameter side of the stator 1, a column is provided to prevent the stator 1 from protruding to the inner peripheral side, or winding is performed by complicated movement. There was a problem that the cost of the line was high.

The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide a motor stator in which the winding speed of the winding is increased and the wedge after the coil insertion is eliminated.

[0005]

In order to achieve this object, the present invention provides an annular yoke having a plurality of recesses on its inner circumference, and a plurality of teeth portions having projections fitted into the recesses. Is provided radially and has an iron core fitted to the yoke, and a plurality of slot portions provided between the tooth portions. Each of the slot portions has a tubular portion extending over two tooth portions. It has a structure in which a coil wound around a bobbin is provided.

[0006]

With this structure, the coil of the stator does not protrude to the inner peripheral side and the outer peripheral side, and the arc-shaped coil can be arranged in the slot portion.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view of a motor stator according to an embodiment of the present invention. In FIG. 1, 10 is a stator, which is a laminated annular yoke portion 11 and yoke portion 1.
A plurality of recessed portions 12 are provided on the inner peripheral portion of 1, and a plurality of tooth portions 14 are provided with a protruding portion 13 that is fitted in the recessed portion 12, and a plurality of teeth portions 14 are radially arranged to stack an iron core 15.
The laminated iron core 15 is integrally molded with resin 16,
A trapezoidal slot portion 17 is provided between the teeth portions 14 of the iron core 15, and further, a coil wound around a bobbin of a tubular portion straddling the respective slot portions 17 and the two teeth portions 14 is provided. For example, the coil is provided across the two teeth portions 14 between the slots A and D (not shown). The concave portion 12 provided in the yoke portion 11 and the convex portion 13 of the tooth portion 14 on which the coil is mounted are fitted to each other.

A method of manufacturing such a motor stator will be described with reference to the drawings. In the figure, the same parts as those in FIG. 1 are the same parts. 2 (a) and 2 (b)
FIG. 3 is a perspective view of a coil bobbin in one embodiment of the present invention. As shown in FIG. 2 (a), 18 is an inner bobbin, and the bobbin 18 is provided with a trapezoidal tubular portion 19 which can be opened and closed and serves as a winding tube. An insulating collar 21 is provided, and a protruding portion 22 is provided on the upper side of the outer surface of the tubular portion 19. As shown in FIG. 2 (b), 23 is an outer bobbin, and the bobbin 23 is provided with a trapezoidal tubular portion 24 that serves as a winding tube and that can be opened and closed. A collar 26 is provided, and a protrusion 27 is provided on the upper side of one of the facing surfaces of the cylindrical portion 24 facing each other.

3 (a) and 3 (b) are perspective views of a coil according to an embodiment of the present invention. As shown in FIG. 3A, the winding 28 is attached to the trapezoidal winding portion of the bobbin 18 by the arrow 2
The main coil 30 is wound in nine directions. In FIG. 3B, the main coil 30 wound around the inner bobbin 18
And an auxiliary coil 31 wound around the outer bobbin 23.

FIG. 4 is a front view of an iron core according to an embodiment of the present invention. As shown in FIG. 4, an iron core 15 having a convex portion 13 and a plurality of tooth portions 14 arranged radially is laminated, and the laminated iron core 15 is integrally molded with a resin 16. The teeth portions 14 are provided with protrusions 32, and the trapezoidal slot portions 17 are provided between the teeth portions 14.

Next, a method of inserting the coil group into the iron core 15 will be described. First, the bobbin 18 of the first main coil 30 is press-fitted (not shown) into the slot portions 17 of A and D of the tooth portion 14, and at this time, the main coil 3
Since the bobbin 18 of 0 moves freely, the projection 22 of the bobbin 18 and the projection 32 provided on the tooth portion 14 are fitted to each other and press-fitted toward the center of the iron core 15, and at the same time, The shape is deformed in the axial direction, and the main coil 30 is prevented from falling outward.

In the same manner, the bobbin 18 of the second main coil 30 is connected to the slot portions 1 of C and F of the two tooth portions 14.
The main coil 30 is press-fitted into the main coil 7 (not shown) to deform the shape of the main coil 30 in the axial direction and prevent the main coil 30 from falling outward. Similarly, the bobbin 1 of the third main coil 30
8 is a slot portion 17 of I and L of two tooth portions 14
At the same time as press-fitting (not shown) into the main coil 30, the shape of the main coil 30 is deformed in the axial direction, and
To prevent falling. Similarly, the bobbin 18 of the fourth main coil 30 is pressed into the K and N slot portions 17 of the two teeth portions 14 (not shown) to deform the shape of the main coil 30 in the axial direction. The fall of the main coil 30 to the outside is prevented.

Similarly, the two teeth portions 14 of the bobbin 18 of the main coil 30 are displaced by 90 ° from the slot portions 17 of A and D, that is, D and I, F and K, L and A,
The bobbin 23 of the auxiliary coil 31 is press-fitted (not shown) into each of the two tooth portions 14 between the N and C slot portions 17, thereby deforming the shape of the auxiliary coil 31 in the axial direction and outwardly. The fall of the auxiliary coil 31 is prevented.

FIG. 5 is a front view of the yoke in one embodiment of the present invention. As shown in FIG. 5, the laminated yoke portion 1
A plurality of recessed portions 12 are provided on the inner peripheral portion of 1. The iron core 1 in which the main coil 30 and the auxiliary coil 31 are inserted into the recessed portion 12 of the yoke portion 11 and the respective tooth portions 14
5 and the convex portions 13 are fitted to each other. Further, the connecting wires of the main coil 30 and the auxiliary coil 31 are connected to the pin support 20 of the bobbin 18 and the pin support 25 of the bobbin 23, respectively.
It is possible to generate a rotating magnetic field of the stator 10 of the two-pole motor by connecting the main coil 30 and the auxiliary coil 31 to the power source from the pin struts at the beginning and end of the winding by means of connectors.

[0015]

As described above, according to the present invention, the openable and closable tubular portion provided on the bobbin makes it possible to increase the winding speed of the winding and to eliminate the wedge after insertion of the coil, thus reducing the number of winding steps. Thus, it is possible to realize an excellent motor stator with reduced cost.

[Brief description of drawings]

FIG. 1 is a plan view of a motor stator according to an embodiment of the present invention.

FIG. 2A is a perspective view of a coil bobbin according to an embodiment of the present invention. FIG. 2B is a perspective view of a coil bobbin according to an embodiment of the present invention.

FIG. 3A is a perspective view of a coil according to an embodiment of the present invention, and FIG. 3B is a perspective view of a coil according to an embodiment of the present invention.

FIG. 4 is a front view of an iron core according to an embodiment of the present invention.

FIG. 5 is a front view of a yoke according to an embodiment of the present invention.

FIG. 6 is a perspective view of a conventional motor stator.

[Explanation of symbols]

 10 Stator 11 Yoke part 12 Recessed part 13 Convex part 14 Teeth part 15 Iron core 16 Resin 17 Slot part 18,23 Bobbin 19,24 Cylindrical part 20,25 Pin support 21,26 Collar 22,27 Projection part 28 Winding 29 Arrow 30 Main coil 31 Auxiliary coil 32 Protrusion

Claims (2)

[Claims] 1. An iron core in which an annular yoke having a plurality of recesses on its inner circumference and a protrusion which is fitted into the recess are provided and a plurality of teeth are provided radially and which is fitted into the yoke. And a plurality of slot portions provided between the tooth portions, and each of the slot portions is provided with a coil wound around a bobbin of a tubular portion across two tooth portions. Motor stator. 2. The stator of a motor according to claim 1, wherein the bobbin is provided with a tubular portion that can be opened and closed.