JP3130092B2 - Motor stator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stator for an electric motor used for driving a fan of home electric appliances.

[0002]

2. Description of the Related Art In recent years, in the production of small motors, while further mechanization and cost rationalization have been attempted, downsizing of the motor itself has been required.

Conventionally, as shown in FIGS. 7 and 8, a stator for a motor of this type is arranged such that a plurality of tooth cores 101 are radially arranged at regular intervals and mechanically retain this shape. Molded integrally with resin such as engineering plastic. The molded resin shape is the tooth core 10
1, a cylindrical guide portion 103 for pressing and holding the outer peripheral portions of the first winding 107 and the second winding 108, and a cylindrical portion 102 for holding the first winding 1, an insulating portion in the upper and lower end surfaces of the toothed core 101 and the slots, 104, and further comprising a winding wire 110
Disk part 10 for attaching pin terminal 106 for binding
5 is provided on the upper end surface of the cylindrical portion 102.

In the above configuration, the winding wire 110, which is the start and end of each of the windings 107 and 108, is wound around the pin terminal 106 attached to the disk portion 105 while being entangled. Is formed by press-fitting a ring-shaped yoke portion core 111 that forms

[0005]

In such a conventional motor stator, a resin disk portion 105 is located at the uppermost portion of a cylindrical portion 102, and a pin terminal 10 is provided on the upper surface of the cylindrical portion 102.
6, the axial dimension of the stator increases by the length of the pin terminal 106, and the axial dimension of the housing case and the dimensions of the attached product also increase. The inner diameter of the disk 105
Is smaller than the inner diameter of the tooth core 101,
Rotor (not shown) inserted one way when assembling the motor
Direction, that is, only on the side where the disk portion 105 is provided.
There was a problem.

The present invention has been made to solve the above-mentioned problem, and has a maximum axial dimension even when a pin terminal is attached.
To provide a motor stator that is less than the height of the section
As a first object.

A second object is to reduce the axial dimension even when the pin terminal is attached, and at the same time, to provide a pin terminal at the inner peripheral edge of the cylindrical portion without providing a molded portion smaller than the inner diameter of the tooth core. It is an object of the present invention to provide a motor stator that allows mounting of a motor.

[0008]

According to a first aspect of the present invention, there is provided a stator for an electric motor, wherein a plurality of teeth cores on which winding conductors are wound are made of a resin material. The resin molded part is an integral part of the stator. The resin molded parts are the upper and lower end surfaces of the tooth core, the insulating parts in the slots, the cylindrical part holding the shape of the tooth core, and the first and second winding conductors. It comprises a guide part for pressing and holding the outer periphery, and a disk part for attaching a pin terminal for winding the starting and ending ends of the winding conductor, and this disk part is arranged at a position lower than the upper end surface on the inner peripheral side of the cylindrical part. A configuration in which a plurality of winding grooves are provided in a cylindrical portion above the disk portion.

A first means for achieving the second object is that a plurality of tooth cores around which a winding conductor is wound are formed of a resin material.
The resin molded part is toothed iron
Insulations in the upper and lower end faces of the core, in the slot, and the shape of the tooth core
And the first and second winding conductors, respectively.
A guide portion for pressing and holding the outer periphery.
The upper end surface of the guide portion for the first winding is provided below the upper end surface of the cylindrical portion, and the start and end of the winding conductor are provided on this upper end surface.
A configuration in which pin terminals to be wound are attached is adopted .

A second means for achieving the second object is to provide an upper end surface of a guide portion of the first winding conductor at a position lower than an upper end surface of the cylindrical portion. The guide portion is provided with one or more steps, and a pin terminal is attached to each upper end surface.

[0011]

According to the first aspect of the present invention, even when the pin terminals are attached to the upper end surface of the disk portion of the resin, all of the pin terminals do not protrude from the upper end surface of the cylindrical portion of the resin.

Further , according to the configuration of the second means, the cylindrical portion
Pin terminals can be attached without forming a molded shape on the inner circumference
The pin terminal is attached to the upper end surface of the guide part.
Also, it is eliminated that all pin terminals protrude from the cylindrical part the upper end surface of the resin.

[0013] Further, according to the configuration of the third means, the pin terminals can be attached without providing a molded shape on the inner periphery of the cylindrical portion. Does not protrude from the upper end surface of the cylindrical portion of the resin.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. As shown in the figure, a plurality of tooth cores 1 are radially arranged at equal intervals, and are integrally molded with a resin such as engineering plastic so as to mechanically hold the shape. The shape of the molded resin is the cylindrical portion 2 that retains the shape of the tooth core 1, the upper and lower end surfaces of the tooth core 1, the insulating portions in the slots, and the first winding 8 and the second winding 9. It has guide portions 3 and 4 shaped to press and hold the outer peripheral portion. Further, it has a disk portion 5 to which a pin terminal 6 for winding the winding element wire 11 is attached. The position of the disk portion 5 is such that the upper portion of the pin terminal 6 to be attached does not protrude from the cylindrical portion 2 and is dropped downward from the upper end surface on the inner peripheral side of the cylindrical portion 2 . At multiple locations on a given cylindrical section 2
A wide winding groove 7 is provided. Then, with respect to the integrally formed tooth core 1, the first and second windings 9, and the winding element wire 11 at the start and end of each winding are arranged on the pin terminal 6 along the winding groove 7. A required number of windings are directly wound while being entangled, and after inserting the slot opening insulating wedge 10, a ring-shaped yoke portion core 14 forming a magnetic path is press-fitted.

In the above configuration, since the disk portion 5 is located below the upper end surface of the cylindrical portion 2, all of the pin terminals 6 do not protrude from the upper end surface of the cylindrical portion 2, and the disk portion 5 has a cylindrical shape. On the inner peripheral side of the part 2
Since the wide winding groove 7 is provided, the winding wire 11
Due to the degree of freedom in the positional relationship with the pin terminal 6, work
The pin terminals 6 can be arranged at good positions, and the winding wires 11 can be entangled with the pin terminals 6 along the upper surface of the disk portion 5.

As described above, according to the motor stator according to the first embodiment of the present invention, the axial dimension is equal to the lamination of the tooth core 1 and the height of the cylindrical portion 2 at the upper and lower ends of the tooth core 1. Almost fits in the total dimensions of

[0017] Next, a second embodiment of the present invention, FIG. 3
This will be described with reference to FIG. The same parts as those of the first means are denoted by the same reference numerals, and detailed description thereof will be omitted. As shown in the figure, the resin molded integrally with the tooth core 1 has a cylindrical portion 2 that retains the shape of the tooth core 1, upper and lower end surfaces of the tooth core 1, an insulating portion in a slot, and a first winding. 8, and guide portions 3 and 4 on pillars for pressing and holding the respective outer peripheral portions of the second winding 9. The guide portion 3 of the guide portion, which is located above the tooth core 1 and presses and holds the outer peripheral portion of the first winding 8, has a winding element wire 11 on its upper end surface.
A pin terminal 6 for entanglement is attached. The height position of the upper end surface of the guide portion 3 is the position of the pin end to be attached.
The cylindrical part 2 has a size such that the upper part of the child 6 does not protrude from the cylindrical part 2.
Lower than the upper end face of. With respect to the integrally formed tooth core 1, the first and second windings 8, 9 are arranged in this order with the winding element wire 11 at the beginning and end of each winding along the winding groove 7 and the pin terminal 6.
After the necessary number of windings are wound directly, the slot opening insulating wedge 10 is inserted, and then a ring-shaped yoke core 14 forming a magnetic path is press-fitted.

In the above configuration, a molded portion is formed on the inner periphery of the cylindrical portion 2.
The pin terminal 6 can be attached without providing a minute,
Since the upper end surface of the guide portion 3 to which the pin terminal 6 is attached is lower than the upper end surface of the cylindrical portion 2, the entire pin terminal 6 does not project from the upper end surface of the cylindrical portion 2.

[0019] According to the second embodiment of the motor stator of the present invention, in either the insertion of the rotor in the axial direction
At the same time, the dimension in the axial direction can be substantially accommodated in the total dimension of the stack of the tooth cores 1 and the height of the cylindrical portion 2 at the upper and lower ends of the tooth cores 1.

[0020] Next, a third embodiment of the present invention will be described with reference to FIGS. The first means,
The same parts as those of the second means are denoted by the same reference symbols, and detailed description thereof will be omitted. As shown in the figure, the stepped guide 12 for pressing and holding the outer peripheral portion of the first winding 8 has a flat portion 13 formed by forming a step in the axial direction, and the upper end surface of the stepped guide 12 and the flat portion 13 are formed. The upper end surface is attached to a position where the insulation distance between the pin terminals 6 can be sufficiently ensured. The height position of the upper end surface of the step guide 12 is such that the tip end of the pin terminal 6 is lower than the upper end surface of the cylindrical portion 2. A required number of windings are wound on the integrally formed tooth core 1 by winding the winding wire 11 at the start and end of each winding in the order of the first winding 8 and the second winding 9 to the pin terminal 6. After being directly wound and the slot opening insulating wedge 10 is inserted, a ring-shaped yoke core 14 forming a magnetic path is press-fitted.

In the above configuration, a molded portion is formed on the inner periphery of the cylindrical portion 2.
The pin terminal 6 can be attached without providing a minute,
The upper end surface of the stepped guide portion 12 to which the pin terminal 6 is attached is
Since the pin terminals 6 are located below the upper end surface of the cylindrical portion 2, the entire pin terminals 6 do not protrude from the upper end surface of the cylindrical portion 2.

[0022] According to the third electric motor Example stator of the present invention, from which the insertion of the rotor in the axial direction
At the same time, the dimension in the axial direction can be substantially accommodated in the total dimension corresponding to the lamination of the tooth core 1 and the height of the cylindrical portion 2 at the upper and lower ends of the tooth core 1. In addition, since a plurality of pin terminals 6 can be attached to one stepped guide portion 12, tapping in which the number of winding wires 11 becomes large by switching the speed of the motor becomes easy.

In the embodiment, one flat portion is added by one step. However, if the insulation distance between the pin terminals to be attached can be sufficiently secured, a plurality of flat portions may be provided. Does not occur.

[0024]

As is apparent from the above embodiment, according to the present invention, the position of the upper end surface of the disk portion or the guide portion on which the pin terminal is mounted is below the cylindrical portion, and even if the pin terminal is mounted. The entire length of the pin terminal does not protrude from the upper end surface of the cylindrical part, and the axial dimension is almost the total dimension of the core layer and the cylindrical part at the upper and lower ends of the core, reducing the axial dimension. And the disk
Is on the inner peripheral side of the cylindrical part, and a wide winding groove is
The degree of freedom in the pin terminal position
The workability of binding the wire can be improved, and the wire can be tied to the pin terminal along the upper surface of the disk part through the winding groove, preventing the winding wire from floating and ensuring quality. A stable motor stator can be provided.

[0025] In addition, the rotor
Insertion is possible from either axial direction of the stator.
Workability is improved.

Further , by providing a stepped guide, a large number of pin terminals can be attached, and a stator for an electric motor can be provided which has an effect of being able to cope with winding specifications in which the speed is frequently switched.

[Brief description of the drawings]

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

FIG. 2 is a sectional view of the first embodiment.

FIG. 3 is a perspective view of the second embodiment.

FIG. 4 is a sectional view of the second embodiment.

FIG. 5 is a perspective view of the third embodiment.

FIG. 6 is a sectional view of the third embodiment.

FIG. 7 is a perspective view of a conventional electric motor.

FIG. 8 is a sectional view of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tooth core 2 Cylindrical part 3 First coil guide part 4 Second coil guide part 5 Disk part 6 Pin terminal 7 Winding groove 8 First winding 9 Second winding 10 Slot opening insulating wedge 11 Winding element Wire 12 Stepped guide 13 Plane part 14 Continuation part iron core

Continuation of the front page (56) References JP-A-3-18257 (JP, A) JP-A-56-162843 (JP, A) JP-A 1-134956 (JP, U) JP-A 55-117160 (JP , U)

Claims (3)

(57) [Claims] 1. A stator in which a plurality of tooth cores around which a winding conductor is wound are integrally formed of a resin material, wherein the resin molded portions are upper and lower end surfaces of the tooth core, insulating portions in slots, and teeth. It comprises a cylindrical portion that holds the shape of the core, a guide portion that presses and holds the respective outer peripheries of the first and second winding conductors, and a disk portion to which a pin terminal for winding the start and end of the winding conductor is attached. with disk portion is disposed at a lower position than the upper end face on the inner peripheral side of the circular cylindrical portion, the stator of the motor comprising a plurality of windings groove above the cylindrical portion from the disk portion. 2. A stator in which a plurality of tooth cores around which a winding conductor is wound are integrally formed of a resin material, wherein the resin molded portions include upper and lower end surfaces of the tooth core, insulating portions in slots, and teeth. A cylindrical portion that holds the shape of the core portion and a guide portion that presses and holds the outer peripheries of the first and second winding conductors. A stator for an electric motor provided below an upper end surface of a cylindrical portion, and a pin terminal for winding the start and end of a winding conductor is attached to an upper end surface of the guide portion for the first winding . 3. An upper end surface of a guide portion of the first winding conductor is provided at a position lower than an upper end surface of the cylindrical portion, and the guide portion is provided with one or more steps, and a pin is provided on each upper end surface. 3. The stator for an electric motor according to claim 2, wherein the terminal is attached.