JPH0638425A - Electric motor - Google Patents

Abstract

PURPOSE:To make it possible to mount bobbins on magnetic paths of cores easily, by dividing the bobbins and mounting the bobbins on the magnetic paths of the cores when connecting the divided parts. CONSTITUTION:A yoke part 1 formed in a ring shape in cores is formed in an electric motor. Tooth parts 2 extending toward shaft cores are formed in the inner diameter side of the yoke part 1. Magnetic poles 3 are formed in the inner diameter side of the tooth parts 2. Bobbins 4 made of insulating materials such as resin are mounted on the tooth parts 2 and windings 5 are wound on the bobbins 4. The bobbins 4 are mounted on the tooth parts 2 of the cores through connecting divided parts 6 and are formed so that the bobbins 4 can be rotated to the tooth parts 2. A plurality of the tooth parts 2 are installed on the yoke part 1 and the bobbins 4 are mounted and the windings 5 are wound on the bobbins 4. Thus, dividing the cores is not needed and the winding can be directly wound on the bobbins, and the windings can be operated without damaging the windings even in the case of winding of the electric motor for high voltage for winding a thin winding.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric motor having a structure in which windings can be easily wound.

[0002]

2. Description of the Related Art An electric motor is constructed such that a winding is wound around an iron core and an electric current is applied to form a rotating magnetic field to rotate an internal rotor. The electric motor having such a configuration is configured to form a magnetic path by disposing an iron core on the outer periphery of the rotor in order to cause the magnetic flux generated by the windings to act on the rotor. And this magnetic path will be composed of the magnetic pole part that acts on the rotor and the magnetic path part that converges the magnetic flux by the winding.
It will be wound in such an arrangement that magnetic flux flows in this magnetic path.

That is, in most cases, the winding is wound around the tooth portion or the yoke portion.

In the conventional winding method, the winding is wound between the teeth in the form of poles. In this case, the winding is wound between the separated teeth. Therefore, many windings extend to the axial end portion of the iron core, and the winding amount becomes unnecessarily large, which is uneconomical. In addition, such a winding extending to the end of the iron core is not only uneconomical, but also causes a loss due to the electric resistance of the winding, which is an obstacle to improving the efficiency and downsizing of the motor. .
Therefore, a toroidal electric motor in which a winding is directly wound around the magnetic path of the iron core has been attempted, and the problem has been solved.

However, in this case, it is difficult to wind the toroidal winding on the doughnut-shaped iron core,
The iron core was divided, and the winding was wound using a special winding machine called a toroidal winding machine. According to such a method, since toroidal winding can be performed,
We were able to obtain a small and highly efficient electric motor.

However, in the former method of dividing the iron core,
The disturbance of the magnetic flux in the divided portions causes the disturbance of the torque of the rotor, which causes vibration and noise. In addition, the divided iron cores must be joined by a method such as welding, which results in insufficient roundness of the iron cores, resulting in poor efficiency and vibration noise. .

In the latter type of toroidal winding machine, the winding can be wound without dividing the iron core, but once the winding is wound around the C-shaped ring or the like interposed in the iron core, Next, since the winding is wound around the iron core so as to be rewound, there is a possibility that the winding time becomes long and the winding may be damaged.

The present invention has been made in view of such circumstances, and in order to solve the conventional problems, it is possible to divide an iron core or use a toroidal winding machine which requires a long time for winding. Moreover, it is an object of the present invention to provide an electric motor having a structure in which windings can be easily and surely wound without dividing an iron core.

[0009]

DISCLOSURE OF THE INVENTION The present invention is directed to a yoke portion formed in a ring shape, a tooth portion extending toward the inner diameter side of the yoke portion toward the axis, and an inner diameter side of the tooth portion. A magnetic pole formed by the magnetic pole, a magnetic path formed by the magnetic pole, the yoke portion, and the tooth portion, and a divided portion is attached to the yoke portion or the tooth portion forming the magnetic path in a joined manner. The problem is solved by providing the bobbin and the winding wound by rotating the bobbin.

[0010]

The bobbin is divided, and the bobbin can be easily attached to the magnetic path portion of the iron core by attaching the divided portion to the magnetic path of the iron core. The bobbin attached to the magnetic path of the iron core can be easily wound by attaching the winding and rotating the bobbin.
Furthermore, if a predetermined amount of winding is wound, the winding can be made to flow the required magnetic flux in the magnetic path.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to an embodiment shown in the drawings. FIG. 1 is a plan view showing a main part of an electric motor according to an embodiment of the present invention. FIG. 2 is a vertical cross-sectional view of a main part of the electric motor shown in FIG. FIG. 3 shows another embodiment of the iron core to which the bobbin is attached. FIG. 4 shows another embodiment in which the bobbin is mounted. FIG. 5 is a perspective view of an essential part showing a state in which a winding is wound around a bobbin. FIG. 6 is a vertical cross-sectional view of a main part showing a state in which the bobbin is mounted. FIG. 7 is a vertical cross-sectional view of a main part showing a state in which a winding is wound around a bobbin. FIG. 8 is a cross-sectional view of a main part showing a state in which the winding is wound around the bobbin. FIG. 9 is a plan view of an essential part of an electric motor showing another embodiment.

In FIG. 1, a ring-shaped yoke portion 1 is formed in an iron core formed by laminating steel plates, and the electric motor has an inner diameter side of the yoke portion 1 facing an axial center. A tooth portion 2 to be extended is formed, and a magnetic pole 3 is formed on the inner diameter side of the tooth portion 2 to form a magnetic path.
Are configured to face a rotor (not shown) with a slight gap.

A bobbin 4 made of an insulating material such as resin is mounted on the tooth portion 2.
The winding 5 is wound.

In FIG. 2, the bobbin 4 is attached to the tooth portion 2 of the iron core by joining the divided portions 6 and is configured to be rotatable with respect to the tooth portion 2.

A plurality of tooth portions 2 are arranged on the yoke portion 1, and bobbins 4 are mounted on the respective yoke portions 1. A winding 5 is wound on each bobbin 4.

In FIG. 3, according to another embodiment of the iron core, the width of the tooth portion 7 is small at the end portion in the stacking direction so that the tooth portion 7 is formed along the inner diameter side of the bobbin 4.
The width is larger in the central part.

In FIG. 4, the iron core 8 is formed by molding a dust core, and the tooth portion 10 is formed in a circular cross section so that the bobbin 4 can rotate smoothly. The cross-sectional area of the tooth portion 10 is maximized. In FIG. 5, the bobbin 4 is attached to the tooth portion 2 while joining the divided portions, and is configured so that the winding 5 is wound by being rotated.

In FIG. 6, the bobbin 4 is constructed such that the divided portions are joined to the tooth portion 2 and mounted at the same time, and the fitting portions 11a, 11 such as unevenness are attached to the joined portions.
b is formed and is fixed by adhesion or the like.

The fitting portions 11a and 11b may be constructed so as to maintain the joined state of the respective divided bobbins 4, and are limited to the brim portion of the bobbin 4 as in the present embodiment. Even if it is formed in the cylindrical portion around which the winding wire 5 is wound, the same effect can be obtained.

In FIG. 7, the electric motor shows a winding device 15 for winding the winding 5 on the bobbin 12, and in this case, a gear 13 is formed on the outer periphery of the collar portion of the bobbin 12, A drive gear 14 that meshes with the gear 13 is provided in the winding device 15. The winding device 15 is provided with a base 16 for supporting the yoke portion 1 of the iron core, and the clamp 17 for supporting the iron core mounted on the base 16.
Is provided.

In FIG. 8, the winding device 15 includes a bobbin 1
The drive gear 14 is provided so as to mesh with the gear 13 formed in the collar portion of the second gear.
Are configured to be rotated by a stepping motor 18 capable of controlling the number of rotations, and are connected via a bevel gear 19.

The clamp 17 that supports the yoke portion 1 of the iron core is configured to move up and down, and is configured to press and fix the iron core placed on the table 16.

In FIG. 9, an electric motor according to another embodiment includes a bobbin 22 in which a winding 21 is wound around a yoke portion 20. The bobbin 22 is not attached to the tooth portion 23, and the yoke portion 20 and the magnetic pole 24 formed on the inner diameter side are connected to each other to form a magnetic path. In such a configuration, the electric motor forms the iron core by punching and stacking steel plates by a press or the like to form the yoke portion 1, the tooth portion 2 and the magnetic pole 3, and the bobbins 4 a and 4 b divided into the tooth portions 2. Attach so that the divided parts of are joined together. The bobbins 4a and 4b can be easily joined by forming hooks or the like for fitting each other, and an adhesive may be used on the joining surfaces.

The bobbins 4a and 4b are joined to each other in a relatively simple manner, because once the winding 5 is wound a little, the bobbin 4a and 4b cannot be separated by the wound winding 5 and the joined state can be maintained. Good and not difficult. The winding of the winding 5 around the bobbin 4 is convenient because the number of windings can be controlled by controlling the rotation speed of the bobbin 4. To this end, the winding machine 15 as shown in FIG.
In the above, if the driving gear 14 is rotated by the electric motor 18 such as a stepping motor whose rotation speed can be easily controlled, the manufacturing becomes easy. Also, bobbin 4
Is capable of rotating with high torque when the gear 13 is formed in the flange portion, and is therefore suitable when the winding pressure of the winding 5 is desired to be increased. Of course, even if the gear 13 is not formed, the winding 5 can be wound around the bobbin 4 even if a rotating body that makes frictional contact with the outer periphery of the collar is provided. In particular, since the winding wire 5 is simply wound around the bobbin 4, it is not necessary to wind the winding wire tightly, that is, it is not necessary to wind the winding wire 5 while tightening the bobbin 5 while pulling the winding wire 5. Can be wound independently.

The position where the winding 5 is provided, that is, the mounting portion of the bobbin 4, may be the yoke portion 1 as shown in FIG.
The iron core has a structure in which a magnetic path is formed, and the bobbin 4 is provided in the magnetic path.
And the winding 5 may be wound.

As shown in FIG. 3, in order to make the cross-sectional shape of the tooth portion 7 resemble the inner diameter side of the bobbin 4, a multi-step press such as a transfer is used when punching a steel plate, and the tooth portion is formed. It can be easily formed by sequentially changing the width of 7. Further, in order to configure such a process, punching with different widths of the tooth portion 7 can be easily completed by programming. Further, the punched steel plates can be easily realized by adopting a structure having a property of bonding to each other such as projection bonding.

Further, as shown in FIG. 4, when the iron core is formed by the dust core, it can be formed by molding, so that an arbitrary shape can be obtained very easily, and the tooth portion 10 having a circular cross section which fits the bobbin 4 can be easily formed. Can be formed.

The electric motor constructed as described above is provided with the bobbin 4
Since the connection between the tooth and the tooth portion 2 is loosely fitted, vibration will occur when the winding 5 is energized. If such a problem occurs, the outer periphery is covered with a premix or the like to form a frame. Then, the winding 5 and the bobbin 4 are embedded together with the iron core in the frame of the premix, and strong integrity is obtained, so that the problems of vibration and noise can be solved. In addition, since the bobbin can be easily molded and manufactured, and also has a good insulating property, the winding can be sufficiently insulated without insulating the iron core, and the insulating characteristic is extremely good with a simple structure.

[0029]

According to the present invention, it is not necessary to divide the iron core, and the divided bobbin has nothing to do with the electrical or magnetic characteristics due to the division, and does not affect the electric motor at all. It is possible to obtain an electric motor having good characteristics without deteriorating the characteristics of. Also,
In terms of manufacturing, the winding can be wound directly on the bobbin, and since the winding is simple, even winding of a high voltage motor, which requires winding a thin winding, is almost impossible to wind. Since the winding work can be performed without damaging the wire and the winding can be wound around the bobbin at a high speed, good workability can be obtained. These effects, including the good insulation of the bobbin, are extremely effective when mass-producing high-quality electric motors.

[Brief description of drawings]

FIG. 1 is a plan view showing a main part of an electric motor according to an embodiment of the present invention.

FIG. 2 is a vertical sectional view of a main part of the electric motor shown in FIG.

FIG. 3 is another embodiment of the iron core to which the bobbin is attached.

FIG. 4 is another embodiment in which a bobbin is mounted.

FIG. 5 is a perspective view of an essential part showing a state in which a winding is wound around a bobbin.

FIG. 6 is a vertical cross-sectional view of a main part showing a state in which a bobbin is mounted.

FIG. 7 is a vertical cross-sectional view of a main part showing a state in which a winding is wound around a bobbin.

FIG. 8 is a transverse cross-sectional view of a main part showing a state in which a winding is wound around a bobbin.

FIG. 9 is a plan view of an essential part of an electric motor showing another embodiment.

[Explanation of symbols]

 1, 20 ... Yoke part 2, 7 ... Tooth part 3 ... Magnetic pole 4, 7, 10 ... Bobbin 5, 21 ... Winding 15 ... Winding machine

Claims (1)

[Claims] 1. A ring-shaped yoke portion, a tooth portion that extends toward the inner diameter side of the yoke portion toward the axial center, and a magnetic pole that is formed on the inner diameter side of the tooth portion. A magnetic path formed by the magnetic pole, the yoke portion, and the tooth portion, a bobbin in which a split portion is joined to the yoke portion or the tooth portion forming the magnetic path, and the bobbin is rotated. An electric motor comprising: