JPS63194552A - Motor - Google Patents

Abstract

PURPOSE:To improve the efficiency of a motor and to facilitate the manufacture of the motor by providing a plurality of poles for holding a ring magnet, and displacing the outer peripheries of the poles in a rotating direction to form a skew. CONSTITUTION:A shaft 5 has a plurality of ring magnets 6a-6f to be associated with poles 7a-7l so as to holds the magnets 6a-6f. The magnets 6a-6f are axially magnetized to be formed in a ring shape, and engaged with a shaft 5. The poles 7a-7l for holding it are bent at the outer peripheral edges axially to form a cylindrical surface 8. When the poles 7a-7l are engaged with the shaft 5, if they are individually displaced circumferentially at necessary positions, a skew is formed. Thus, since the efficiency of a motor is improved and the manufacture is facilitated, a motor having good performance is obtained inexpensively.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to the construction of an electric motor having a magnetic rotor forming a skew.

"Prior Art" An electric motor is generally configured to have a skew formed between a stator and a rotor so as to rotate smoothly during rotation.

"Problems to be Solved by the Invention" In the case of a magnetic rotor, such a skew cannot be easily formed because the rotor is magnetized by the magnet.

For this purpose, a ring-shaped magnet 2.3.4 is fitted onto the shaft 1 as shown in FIG.
．． 3.4 is magnetized in the circumferential direction to form magnetic poles 2a, 2b, 2c, and 2d as shown in FIG. 2(b).

Then, as shown in Fig. 2(C), the magnet 2.3
．． Attempts have been made to sequentially unevenly distribute 4 in the circumferential direction to form a skew with equal constraints.

According to such a method, when fixing the magnets 2.3.4 to the shaft 1 one after another, they must be fixed unevenly,
It was difficult to accurately form the skew due to the shape of the magnets 2, 3, and 4.

In particular, since there are no irregularities on the outer periphery, it is difficult to use a jig and the quality becomes unstable.Furthermore, if it cannot be securely fixed to the shaft 1, centrifugal force due to the nature of the rotor will cause the magnets to 2.3.
4 was peeled off and damaged.

The present invention was made in view of these circumstances, and
The objective is to obtain an electric motor that is easy to manufacture, allows accurate skew formation, and improves performance.

"Means for solving the problem" The present invention includes a ring magnet magnetized in the axial direction on a shaft, a plurality of magnetic poles that sandwich the ring magnet, and the outer periphery of the plurality of magnetic poles is unevenly distributed in the rotation direction. The problem is solved by forming a skew by

"Operation" When fixing a ring magnet to a shaft, since it is magnetized in the axial direction, the position in the circumferential direction is irrelevant to forming a skew, and the magnetic poles that sandwich this ring magnet are made of magnetic material such as iron. Any material that is easy to process can be selected, and it can be fixed using a jig by forming a protrusion in the radial direction or the like.

“Embodiment” The present invention will be explained based on an embodiment shown in the drawings. Figs. 1 (a>, (b), and (C) show a rotor of an electric motor according to an embodiment of the present invention FIG.

In FIG. 1(a), the electric motor is equipped with a plurality of ring magnets 6a, 6b, 6c, 6d, 6e, and 5f on a shaft 5.
magnetic pole 7a to sandwich b, 5c, 6d, 6e16f
, 7b, 7C17d, 7e, 7f, 7Q, 7h, 71.
7j and 7 are combined with 171, respectively.

Ring magnets 5a, 6b, 6c, 6d, 6e16f
are each magnetized in the axial direction and formed into a ring shape, and are fitted onto the shaft 5.
7i, 7j, 7k, and 71 are configured such that their outer diameter sides are bent in the axial direction to form a cylindrical surface 8.

In FIG. 1(b), magnetic poles 7a, 7b, 7C17d,
7e, 7f, 7g, 7h, 71.7j17 and 171 are
The ring magnets 6a, 6b, and 6c are configured such that the outer diameter side thereof is bent in the axial direction.

The cylindrical surfaces 8 formed by a pair of bent portions that sandwich 6d, 6e, and 6f are crossed so that they do not collide with each other.

In FIG. 1(C), magnetic poles 7a, 7b, 7G, 7d,
The cylindrical surfaces 8 of 7e, 7f, 7Q, 7h, 7i, 7j17k, and 71 are sequentially unevenly distributed in the rotation direction, and a skew is formed as a whole.

In such a configuration, the electric motor has magnetic poles 7a, 7b, 7C17d, 7e, 7f, 7q, so as to sandwich ring magnets 6a, 6b, 6G, 6d, 6e, 6f on the shaft 5.
It is configured by combining 7h, 7i, 7j, 7, and 71.

At this time, the ring magnets 6a, 6b, 5c,
5d, 6e, and 6f are magnetized in the axial direction, but there are no problems with answering them, and their shapes are extremely advantageous in terms of magnetization and processing.
Moreover, anisotropic magnetic materials can be used, making it possible to construct a highly efficient electric motor.

Roughly, magnetic pole 7・a, 7b, 7G, 7d, 7e, 7f,
Since 7g, 7h, 7r, 7j, 7k, and 71 can be formed from easily processed magnetic materials such as iron, the ring magnets 6a to 6 can also be formed by applying a jig to the gap between the poles.
Unlike f, it will not be damaged and can be assembled accurately.

Furthermore, during high-speed rotation as a rotor, the magnetic poles 7a,
7b, 7C, 7d, 7e, 7f.

Since strength is ensured by 7g, 7h, 7i, 7j, 7k, and 71, sufficient strength can be easily constructed.

In particular, vii poles 7a, 7b, 7C17d, 7e, 7f,
In order to form the cylindrical surface 8 on 7q, 7h, 7i, 7j, 7k, 71, magnetic poles 7a, 7b, 7C17d, 7e, 7f,
7g, 7h, 7i, 7j, 7k, 7I as ring magnets 6a, 6b, 6c, 6d.

When 6e and 6f are configured to be sandwiched, they are bent toward one side in the axial direction on the outer diameter side, and the cross section is shaped like an opening, and assembled by crossing them so that the cylindrical surfaces 8 do not collide with each other. By this, fa%7a, 7b, 7C17d, 7e, 7
At f, 7q, 7h, 71.7j, and 7, the cylindrical surface 8 of 71 can effectively form north and south poles in the rotational direction.

And a plurality of magnetic poles 7a, 7b, 7C17d, 7e17
f, 7g, 7h, 7 i, 7j, 7, 7! When these are fitted onto the shaft 5, a skew can be formed by unevenly distributing them at necessary positions in the circumferential direction.

Such a skew can be formed arbitrarily and easily obtained using a jig.

Also, magnetic poles 7a, 7b, 7G, 7d, 7e, 7f are attached to the shaft 5.
, 7g, 7h, 7:, 7j, 7k, 71 when fitting,
It is also possible to configure the spiral so that a skew is formed.

In any case, magnetic poles 7a, 7b, 7C, 7d, 7e
, 7f, 7g, 7h, 71.7j, 7k, and 71 can be made of a magnetic material such as iron, so that the skew can be easily formed by taking advantage of processing advantages.

"Effects of the Invention" According to the present invention, it is possible to provide a rotor that has sufficient mechanical strength and can easily be configured with a good skew, so that the efficiency of the electric motor can be improved and manufacturing can be facilitated. , it is possible to obtain the effect that a high-performance electric motor can be obtained at a low price.

[Brief explanation of the drawing]

FIGS. 1(a), 1(b), and 1(C) are longitudinal cross-sectional views of essential parts showing a rotor of an electric motor according to an embodiment of the present invention. FIGS. 2(a), 2(b), and 2(C) are longitudinal sectional views of main parts showing the structure of a conventional electric motor. 5... Axis, 6a, 6b, 6c, 6d, 6e, 6f-
...Ring magnet, 7a, 7b, 7G, 7d, 7
e, 7f, 70.7h, 7i, 7j, 7k, 71...
Magnetic pole, 8...Cylindrical surface.

Claims (1)

[Claims] An electric motor comprising a ring magnet magnetized in the axial direction on a shaft, a plurality of magnetic poles that sandwich the ring magnet, and a skew is formed by unevenly distributing the outer periphery of the plurality of magnetic poles in the rotation direction.