JP2001359270A - Stator core structure for cylindrical linear motor - Google Patents

Abstract

(57) [Problem] To provide a cylindrical stator having a simple structure by arranging a large number of stator plates radially via projections. SOLUTION: The stator core structure for a cylindrical linear motor according to the present invention is arranged such that a short side (11) of a stator plate (1, 1A) is disposed along a radial direction and a groove (1) is formed along a long side (12). 3) is formed, and a stator winding (4) is provided in each groove (3).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stator core structure for a cylindrical linear motor, and more particularly to a novel stator core structure for easily obtaining a cylindrical stator by arranging a long stator plate substantially in a radial direction. Regarding improvements.

[0002]

2. Description of the Related Art A conventional stator core structure for a cylindrical linear motor of this type has been used, for example, in FIG.
As shown in FIG. 1, a stator block 2 having a required width is formed by laminating in a lateral direction stator plates 1 formed in an axially long shape. A plurality of grooves 3 are formed in the stator block 2 at predetermined intervals along the longitudinal direction, and the grooves 3 of the stator block 2 are fitted into a plurality of stator windings 4 formed in a ring shape. By mounting the n stator blocks 2 along the outer periphery of the stator windings 4, the stator blocks 2 and the stator windings 4 form a cylindrical stator 10.

[0003]

The conventional stator core structure for a cylindrical linear motor has the following problems because it has been configured as described above. That is, since each stator block is attached to the stator winding, the outer shape of the cylindrical stator is polygonal, and the case provided on the outer periphery of the cylindrical stator is also polygonal, so that the manufacture is not easy. Further, in order to make the inner and outer circumferences of the cylindrical stator circular, each stator block must be reduced in size and the number thereof must be increased, which makes the manufacture extremely difficult.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and in particular, a tubular stator can be easily obtained by disposing a longitudinally-shaped stator plate substantially in a radial direction. An object of the present invention is to provide a stator core structure for a cylindrical linear motor.

[0005]

SUMMARY OF THE INVENTION A stator core structure for a cylindrical linear motor according to the present invention comprises a plurality of stator plates arranged in a cylindrical shape to form a cylindrical stator. In the iron core structure,
The short sides of the stator plate are disposed substantially in the radial direction, the long sides thereof are disposed in the axial direction, grooves are formed at predetermined intervals along the long side, and adjacent to each other. Each of the stator plates has a configuration in which projections are provided at the same or different positions along the longitudinal direction of the long side, and between the respective stator plates is a configuration in which resin is filled. The projection is located near an outer end of the short side.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a stator core structure for a cylindrical linear motor according to the present invention will be described below with reference to the drawings. Note that the same or equivalent parts as those in the conventional example will be described using the same reference numerals. In FIG. 1, a reference numeral 1 denotes a stator plate, and projections 13 are formed at predetermined intervals in a longitudinal direction of a long side 12 formed orthogonal to the short side 11 of the stator plate 1. I have. The projections 13 are formed on only one surface of the stator plate 1, but may be formed on both surfaces.

A projection 13 having the same shape as that described above is also formed on a stator plate 1A provided adjacent to the stator plate 1, and the position of each projection 13 on each of the stator plates 1 and 1A is Are formed at positions different from each other along the longitudinal direction of the
Is located near the outer end 11A in the longitudinal direction.
In addition, the position of the protrusion 13 of each stator plate 1, 1A can be the same.

The two types of stator plates 1 and 1A configured as described above are arranged in a ring shape as shown in FIG. That is, a plurality of grooves 3 are formed at predetermined intervals along the longitudinal direction of the long side 12 on the inner end side of each of the stator plates 1 and 1A. 1A are formed at the same position.

Therefore, when assembling the cylindrical stator 10, first, annular stator windings 4 are fitted into the respective grooves 3 of the stator plate 1, and the stator plate 1A is positioned adjacent to the stator plate 1. Then, each groove 3 is fitted to each stator winding 4. In this state, the protrusion 1 of the stator plate 1 is
3 is in contact with the back surface of the adjacent stator plate 1A, and as shown in FIG.
Is opened by the thickness of the projection 13, and the stator plates 1 and 1A are fitted adjacent to each other and fitted to the stator winding 4 as shown in FIG. The long sides of the short sides 11 of the plates 1, 1A are arranged in a ring shape substantially along the radial direction.

Each of the stator plates 1, 1A is formed by the projections 13.
A resin 20 is filled in the gap formed therebetween, and the stator plates 1 and 1A are fixed so as to be integrated with each other. A tubular cover (not shown) is provided on the outer periphery of the tubular stator 10 formed in a ring shape.

[0011]

The stator core structure for a cylindrical linear motor according to the present invention is constructed as described above, so that the following effects can be obtained. That is, since the magnetic flux of the linear motor using the cylindrical stator passes in the axial direction, iron loss generated when the moving element is moved at high speed can be reduced. In addition, by filling the resin into the gap generated between the stator plates due to the presence of the protrusion, heat generated from the stator windings can be conducted to the case side, so that the heat radiation efficiency is improved and the size can be reduced. Further, by changing the height and position of the projection and the thickness of the stator plate, a cylindrical stator having a large diameter to a small diameter can be manufactured.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a pair of stator plates having a stator core structure for a cylindrical linear motor according to the present invention.

FIG. 2 is an enlarged side view of the stator plate of FIG. 1;

FIG. 3 is a configuration diagram of a tubular stator according to the present invention.

FIG. 4 is a perspective view of FIG. 3;

FIG. 5 is a perspective view of a conventional configuration.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 1A Stator plate 11 Short side 11A Outer end 12 Long side 13 Projection 3 Groove 10 Cylindrical stator 20 Resin

Claims (3)

[Claims] 1. A stator core structure for a cylindrical linear motor, wherein a plurality of stator plates (1, 1A) are arranged in a cylindrical shape to form a cylindrical stator (10). , 1A) are disposed substantially along the radial direction, and their long sides (12) are disposed along the axial direction, at predetermined intervals along the long side (12). A groove (3) is formed, and each stator plate (1, 1A) adjacent to each other is provided with a projection (13) at the same or different position along the longitudinal direction of the long side (12). Features a stator core structure for cylindrical linear motors. 2. A resin between the stator plates (1, 1A).
2. The stator core structure for a cylindrical linear motor according to claim 1, wherein (20) is filled. 3. The protrusion (13) is provided at an outer end (1) of the short side (11).
3. The stator core structure for a cylindrical linear motor according to claim 1, wherein the stator core structure is located near 1A).